HOME | INDUSTRIAL | STATIC | PLATING | NUCLEAR | CONTACT US
Nuclear Products
Nuclear Products - Survey Instruments
PCM-3 : Portable Contamination Monitor, with Pancake Type GM Detector for Contamination Measurement
Download Pdf

Portable Contamination Monitor, Model PCM-3, is a micro controller based, portable, light weight, battery operated instrument for measurement of environmental / field dose rate of gamma ray and x-ray radiation. It is useful for Health Physics applications in Nuclear Power Plants, Nuclear Medical Centres and Radio Isotope laboratories. Model PCM-3 employs external GM detector for direct readout of either dose rate in uR/hr, uSv/Hr, contamination in Bq/gm, Count Rate in CPS or CPM. With Pancake type GM tube, Model PCM-3 is useful for measurement of Contamination in Steel, other metals and alloys.

This pancake type GM tube is supplied externally with 1 meter long cable. Portable Radiation Survey Monitor, Model PCM-3, works on 6V rechargeable Ni-MH batteries. A mains operated charger is also supplied with PCM-3 for keeping the batteries charged. Typical operational battery charge life is 8 to 10 hours of continuous use.

Selection of Material, either Aluminium or Iron or Cast Iron or Copper is provided. In addition to these materials, user can add two more materials (of his choice) of different densities. User can enter material thickness between 0.1 mm to 999.9 mm. Backlit ON/OFF key allows user to turn OFF the backlit to enhance the battery charge. Backlit Time can be set as 1 or 2 or 5 minutes. Two line LCD display is used as interactive Menu for displaying Dose Rate in µR/Hr or Contamination in CPS or in Bq/gm and also to get the type of material and its thickness. Display of battery voltage and HV is also provided. No Pulse Alarm, Low Battery and HV Fail indications are also shown on LCD.

Calibration of PCM-3 is done at factory, using Co-60 radioactive sources supplied by BRIT, Mumbai. A small check source (Co60) can be supplied as an option at extra cost. Dose Rate Alarm setting is also provided to activate an LED indicator when the incident dose rate value exceeds the set alarm value.

Model PCM-3 is supplied with standard accessories like battery charger, operating manual and carrying case.

Specifications :

Detector
GM Tube : Pancake type, externally mounted with 1 meter long interconnecting cable
Radiation Detected : Alpha, Beta (without Shutter), Gamma/X Rays
Contamination Monitor
Measurement Ranges (User Selectable) : Contamination : 0.01 - 100.00 Bq / gm
Dose Rate : 0 - 20,000 uR/Hr, 0-200 uSv/Hr
Count Rate : 0- 10,000 CPS
Accuracy : ± 20% of Range
Energy Range : 100 KeV to 2 MeV
Time Constant : 1 second for CPS and 10 second for Bq/gm or µR/Hr or uSv/Hr
High Voltage : +300 to + 900 Volts at 0.1 mA internally set
Material : Stainless Steel, Aluminum, Copper, Iron and Cast Iron + two user settable materials of known densities (only for Bq/gm scale)
Material Thickness : 0.1 to 999 mm (only for Bq/gm scale)
Menu Display : 16 x 2 Line display for display of reading and parameters
Dose Rate Alarm : Settable in mR/Hr throughout the range
Alarm Indication : Illuminated RED LED, Audio Buzzer
Diagnostic Output : No pulse, Low battery and HV fail Indication
Audio Output : Chirper output proportional to incident dose rate, user selectable ON/OFF
Backlit : User selectable ON or OFF, Backlit time : 1, 2 or 5 minutes (settable)
Battery/ Charger : 4 nos of Ni-MH AA type Duracell (20 Hrs of operational life) with external battery charger
General
Dimensions : 140 W x 110 B x 50 H cm
Weight : Approximately 500 gms
Standard Accessories : Operating Manual, Carrying Case

Top

DMRSM – Micro R Survey Meter (Digital)
Download Pdf
Application Note

Micro R Survey Meter (Digital) Model DMRSM is a portable, Si-Lab micro-controller based, battery operated instrument for measurement of environmental low level gamma radiation dose rate. It employs an internally housed 1”x1” NaI(Tl) detector integrally coupled to a 1” dia PMT offering optimum performance to lower energies.

The unit can measure and display dose rate in the range of 0-500 uR/Hr on a LCD screen on the front panel. Other parameters such as alarm level set by the user, the battery voltage and the HV applied to the detector are displayed on the LCD screen. The front-panel controls include a Potentiometer for setting dose rate alarm level, a power On/Off switch. The alarm is adjustable over the entire scale range.

Model D-MRSM offers display of dose rate either in µSV/Hr or µR/Hr or in CPS. Alarm Level is settable in µSV/Hr or µR/Hr unit.

The mechanical design consists of the cast aluminium instrument housing with its sealed battery compartment and an accompanying metal handle. Thus, it offers an industrial robustness and quality that promotes long-lasting protection and instrument life.

Model DMRSM having very sensitive detector, is useful for Health Physics applications in Radioisotope Laboratories, Nuclear Power Plants and nuclear medical centres. It is also useful for measurement of radioactive contamination in steel, other metals & alloys.

Specifications :

Detector : 1” dia x 1” thick NaI(Tl) detector with 1” dia PMT
Measurement Scales : 0-500 uR/Hr, 0-5.00 uSv/Hr, 0-999 CPS, Manual Scale selection option
Accuracy : ± 10% of Range for Cs-137
Time Constant : 4 Seconds
High Voltage : 0 to + 1000 Volts, internally settable
Display : 16 x 2 Character LCD screen and a red LED for Dose Rate Alarm
Alarm : Audio alarm when count rate exceeds set dose rate level (mR/Hr)
Alarm Indications : Red LED and Audio Buzzer
Indications : Low battery, No Pulse alarm, HV Fail
Enclosure : ABS enclosure
Dimensions : 260 L x 120 B x 136 H mm excluding handle dimensions
Weight : Approximately 2.5 Kgs
Battery : Five nos. of 1.2V Rechargeable Ni-MH batteries (12 Hrs of operational life) with external battery charger.

Top

PRSM-1 : Radiation Survey Meter (Digital)
Download Pdf

Portable Radiation Survey Monitor Model PRSM-1 is a micro-controller based, portable battery operated instrument for measurement of environmental/ field dose rate of Gamma and X-ray radiations. It is useful for Health Physics applications in Radioisotope Laboratories, Nuclear Power Plants and nuclear medical centres.

MModel PRSM-1 employs either an internal or external GM detector for direct readout of either dose rate or counts for selected time interval. The GM Tube is selected considering the intended use of survey meter. PRSM-1, is powered by 4 nos of Ni-MH type rechargeable batteries. It is equipped with Audio Chirper and can be turned ON / OFF as per users choice. 16 X 2 Char LCD provides interactive Menu and Dose Rate Display / Counts.

Specifications :

Detector Probe : Halogen quenched GM Tube
Ranges : For Pancake GM Tube - Sensitivity 60 CPS/mR/Hr (upto 100 mR/Hr) For thin Walled GM tube – Sensitivity 18 or 22 CPS /mR/Hr **
Measurement Scale : User selectable: 0 - 200 mR/Hr , 0 - 2000 µSV/Hr , CPS , CPM, Bkg
Accuracy : ± 20% of Range
Energy Range : 100 KeV to 2 MeV
Integration Time (sec) : Settable as 1 Sec, 5 Sec, 10 Sec
High Voltage : +300 to + 900 Volts at 0.1 mA internally settable
Display : 16 x 2 Line display for Dose Rate Indication and HV Indication
Backlit : User selectable ON or OFF
Backlit Time : User selectable 1, 2 or 5 minutes
Chirper : Audio proportional to incident radiation rate. User selectable ON/OFF
Alarm : Audio alarm when count rate exceeds set dose rate level (mR/Hr)
Indications : Low battery, Detector failure audio & display indications
Dimensions : 185 L X 95 B X 40 H mm
Weight : Approximately 500 gms
Battery : 4 nos of Ni-MH AA type Duracell (20 Hrs of operational life) with external battery charger
    ** Sensitivity depends upon selected GM tube   

Top

PCM-2A : Contamination Monitor
Download Pdf

PCM-2A, Contamination monitor is used for measurement of radioactive contamination in Nuclear Power Plants, Nuclear Medicine Centers. This instrument is ideally suitable for scanning material, tools, clothing, personnel etc. It is a mains operated unit & includes nuclear detector (GM tube) assembly probe and processing electronics. Indication of CRM in ranges of 0 to 10, 100 or 1000 CPS is available on 96 mm X 96 mm square, taut band meter. Range Selector switch enables user to select CRM range or HV or Alarm Level in percentage.

Specifications :

Detector Assembly (GM Tube)
Detectors : Thin walled GM Tube / Pancake type Frikser arrangement
(Other GM detectors also can be offered as option)
Housing : Chrome plated brass tube with shield to prevent beta detection
HV supply : 0 to 1000 Volts @ 1 mA internally set at detector operating voltage
CRM and Failure Alarms
Alarms : Beeper and Red Flasher ON when count rate exceeds preset level
Set Point Adjustment : Adjustment over entire range
Reset : Push switch to clear alarm condition
Failure Alarm : Red Flasher alarm is continuously ON if no pulse is detected within 60 secs
No Pulse Alarm : Continuous ON Red LED
Count Rate Meter
Linear CRM : Three ranges of 0-10, 100 and 1000 CPS switch selectable
Accuracy : ±5 % of full scale
Display : Taut band 96 x 96 mm square panel meter, 270° deflection pointer movement for indication of CRM, HV and Alarm Level
(Other GM detectors also can be offered as option)
General
Enclosure : Powder coated Aluminium table top box
Dimensions : 300 L X 230 W X 155 H mm
Weight : Approx. 4 Kg
Power : 240 V (± 10%), 50 Hz, single phase mains supply

Top

PAG-4 : Para Area Gamma Monitor - (GM Tube based)
Download Pdf

Para Area Gamma Monitor Model PAG-4 is a micro-controller based; economical, stand-alone, mains operated instrument that uses GM tube as nuclear radiation detector. Necessary electronics & high voltage supply are housed in the equipment. PAG-4 has dose rate range 0 to 100 mR/Hr*. Audio and visual alarms turn ON if the dose rate level exceeds the set value. Alarm relay change over contact is provided for external control or indication. * Other ranges are also available on request

This unit is supplied with an Auto ranging direct reading 3+3 digit 7 segment LED display for dose rate, preset alarm level and information related to instrument status, self test etc.

PAG-4 is ideally useful for health physics applications in radioisotope laboratories, nuclear reactors, nuclear power plants, environmental survey labs, etc.

Alarm Level setting, Dose Rate calibration can be performed by using four keys keypad provided on inside subpanel. Optional key lock feature restricts the editing only to the authorized personnel preventing the other persons from tampering the calibration or changing the Alarm parameters.

Normal operating condition is indicated by illuminated large area Green LED. Red Flashing, large area LED accompanied by audio alarm indicates the dose rate alarm condition. On pressing acknowledge key, the instrument will return to normal condition or may continue to flash alarm condition as the case may be. HV status is indicated on inside subpanel LCD.

Status Indication :

Normal Steady Green LED
Dose rate alarm Flashing Red LED & Audio Alarm
On Acknowledge Steady Red LED if dose rate alarm level persists
No pulse / detector Fail Full Bright RED LED

Options

  • 4 – 20 mA and / or 0 to 5V full-scale output proportional to dose rate
  • RS232 - for Hand held Comfigurator or PC COM port interface with data logging software
  • RS485 – Multi drop serial Communication. The monitor will be able to send the instrument data like Instrument ID, dose rate, alarm level and Indication. Data Acquisition software (optional)

Specifications:

Detector ( GM Tube)
Detector : GM tube suitable for 0 to 100 mR/Hr range
(* other GM detectors suiting user’s work also can be offered)
Radiation Detected : Gamma
Detector Housing : Internally mounted
External detector (Optional) - The GM detector probe will be located external to the monitor with 1 meter interconnecting cable. GM tube will be housed in S.S or Aluminium enclosure
Cable length can be supplied upto 20 meters at extra cost (Optional)
Operating voltage : HV supply is factory set as per GM Tube specifications
Monitor
Design : Micro-controller based
Display : Auto ranging direct reading 6 digit seven segment LED display For dose rate, Alarm Level, status indication
Range : 0.1 mR/Hr to 100 mR/Hr* (* Other ranges are available on request)
Response time : Response time is variable between 20 Secs to 1 Sec depending on dose rate
Accuracy : +/- 15 % through the range
Alarm range : 0.1 mR/Hr to 99.9 mR/Hr
Front panel Keys : 2 keys provided on front panel namely Acknowledge and Reset to reset Alarm and 4 keys pad to set Alarm and calibration factor on inside subpanel.
Indication : Large Area Green LED for Normal Indication , Large Area Red Flashing visual and Audio Alarm for dose rate OR Bright Red visual for No Pulse Alarm / detector Fail Alarm, HV fail LED / HV normal LED indication
Outputs : 2 Change Over potential free relay contacts
Construction : Wall mounting type
Dimension : 285 L x 135 D x 255 H mm
Options : 4 to 20 mA and or 0-5V Full Scale Output, RS-232 / RS-485 with data logging software

Top

PAG-3 – Area Gamma Monitor (EMI/EMC Compliant)
Download Pdf

Area Gamma Monitor, Model PAG3 operates on 230VAC, 50Hz mains supply. Purpose of this instrument is to measure and display the Gamma radiation activity of the surroundings. This instrument has internal GM tube which is capable of measuring gamma activity upto 1000 mR. Instrument has 7 segment LED displays (2” or 50 mm size) for dose rate indication in mR/Hr. For remote monitoring purpose, 4-20 mA output is available. The unit is suitable for continuous operation and useful for Health Physics applications in Radioisotope Laboratories, Nuclear Power Plants and nuclear medical centres.

Specifications:

Detector Probe : Halogen quenched GM Tube selected as per dose rate range needed
Ranges : 0 – 1000 mR/Hr
Accuracy : ± 20% of Range
Energy Range : 100 KeV to 2 MeV
Response Time (sec) : not more than 5 Secs
High Voltage : 0 to + 1200 Volts at 100 uA adjustable through 10 turn heliport with calibrated dial available on sub panel
Controls : Available on sub panel internally mounted & access after opening the hinged front door.
Display : 16 x 2 Line display for Dose Rate Indication available on sub panel
½” or 2” 7 Segment LED for Dose Rate Indication on front panel
Output : 4-20 mA output is provided
Alarm : Alarm adjustable throughout the range through LCD and Keypad
Alarm Indication : Red flasher and buzzer to indicate alarm condition
Indications : Low battery, Detector failure audio & display indications
Power Supply : 230VAC +/- 10%, 50Hz, Power On indication on front panel
Operating Conditions : Temperature - 5o C to 45 o C
Relative Humidity < 50% (50 to 95% Occassional)
EMI /EMC Compliance : IEC 61000-4-3, 61000-4-4, 61000-4-5, 61000-4-6

Top

PSAM-1 – Plastic Scintillator based Area Monitor
Download Pdf

Para Plastic Scintillator Monitor Model PSAM-1 is designed to detect low activity nuclear contamination monitor. It employs two plastic scintillators for detection of gamma activity in the surrounding. Automatic measurement of background activity enables Model PSAM-1 to set lowest possible detection limit. Periodical measurement of background activity automatically sets new level of threshold above which aural and visual alarms are activated.

Model Simple to use, yet powerful enough to detect low level nuclear contamination, enables Model PSAM-1 to be used in applications like Nuclear Contamination in Steel. Model PSAM-1 contains a main readout unit with two plastic scintillator detectors coupled through two composite cables to the main readout unit. The signals generated by the detectors are continuously monitored by the microcontroller based circuitry used in the readout unit. Two 7 segment LED displays on the readout unit indicate the instantaneous values of counts (proportional to the incident nuclear radiation) from the two detectors. Audio and Visual Alarm indicators are turned on as soon as the set alarm limit is crossed by the incident radiation. Setting up of Alarm Level and Detection Time (Integration Time) is done through the keyboard and the 16x2 line LCD display. This LCD is also used for indicating various messages and menus.

Typical Applications

  • Area Monitoring
  • Contamination Measurement in Steel or any material
  • Portal Monitor
  • Gate Monitor

Specifications:

Detector Heads
Detectors : 2 nos of 50 mm dia x 600 mm thick plastic scintillator with PMT
Integral assemblies
Front End Modules : 2 nos of preamp, amplifier, SCA and HV circuit
HV Supply : 2 nos, 0 to 1200V settable as per detector specification
Interface Cables : 2 nos Composite cables max length 5 meter each
Readout Unit
Counters : 2 nos of counters to give 999999 counts display
Displays : a) 2 nos of 7 segment LED displays for counts
b) 16 x 2 characters LCD display for menus and messages
Alarms : Cluster LED Red and Green for indication of Alarm and Normal Piezoelectric buzzer for Alarm Indication
Set Up : Counting Time interval – 0.5, 1.0 and 2 seconds
Alarm Level (sigma value) – 1 to 20
Background : Automatic measurement of background radiation
Supply Voltage : 240V/50 Hz AC mains (±10%)
Enclosure : ABS plastic box with transparent door, wall mounting arrangement

Top

CAM A/B Continuous Air Monitoring System
Download Pdf

Model CAM A/B is a Continuous Air Monitoring system with independent Alpha and Beta Channels. CAM A/ B is designed and manufactured indigenously by Para Electronics Mfg. Division of Electronic Enterprises (I) Pvt. Ltd. for Continuous Monitoring of Alpha and/or Beta activity in the surrounding atmosphere.

Electronic flow measurement enables user to get the activity reading in Bq/M3, Time totalized air flow measurement provides information on the amount of air sampled in the given time. However, CAM system is also available with standard Rotameter type air flow measurement providing only CPM Display. There is no interaction between air flow lines, since independent pumps are used for Alpha and Beta channels.

Connectivity of CAM to network or PC is provided through RS-485 /RS 232. Modbus based Data Transfer software is supplied as an option.

Continuous Air Monitoring System CAM is housed in 19” mechanical trolley with two compartments. These compartments house the main electronic Instrument on the top side. Alpha/Beta detectors, lead shield for Beta channel, Flow measurement, Sample Changing mechanisms and two independent Air Sampling Pumps are housed in the lower compartments.


Standard version of CAM A/B includes

  • Alpha Channel with 2” dia ZnS(Ag) scintillation detector mounted on 2” dia PMT, Air Sampling System with electronic flow meter, Easy-to- Replace Filter Paper Holder Arrangement, 100 LPM independent air sampling pumps.
  • Beta Channel with 20 mm dia End Window GM tube, Air Sampling System with electronic flow meter, Easy-to- Replace Filter Paper Holder Arrangement, 100 LPM separate air sampling pump
  • Common Electronic Microcontroller unit with independent HV supplies, Pulse Processing Circuits, Counters, Flow Measurement and Display of Air Flow, CPM and Bq/M3 for each channel. 6 digit LED display for CPM and 4 x 20 Char LCD for menu, Bq/M3, Flow and other menus
  • Low and High Level Count Rate Alarms, 4-20mA output, Potential Free Relay Contact outputs, Green, Red Tower Lamps with Flasher and Audio Alarms for each channel
  • Calibrate Mode to calibrate the activity in Bq using reference sources, Flow in LPM using standard Flow Meter

Electronic Readout Unit uses 2 LED displays for CPM indication. 4 x 20 Character LCD is used for various menus, Bq/M3 and flow reading. 6 Keys pad enables user to set up the parameters and also calibrate the instrument for Flow and Activity measurement.

Keylock is provided to prevent unauthorized tampering of the set up.

2” dia ZnS(Ag) Scintillator based Alpha Detector is mounted on 2” dia PMT. Voltage Divider and Preamplifier are also housed in the detector assembly. This detector gives better than 25% efficiency.

Beta detection is done by 25mm dia GM tube type 72314 from LND USA. GM tube is covered by 25 mm thick lead shield to reduce the gamma background. Beta efficiency is around 10 ~12%

Electronic Flow sensors are employed for measurement of air flow in LPM. The flow totalizer gives the integrated value of air volume that has passed through the filter paper in the given time. This gives accurate estimates of Bq/M3.

These flow sensors are calibrated against standard turbine type flow meter for the range 20 to 100 LPM

Two independent air sampling pumps with 117 LPM (free air) capacity are used for Alpha and Beta Channels. Use of separate pumps removes any interaction of air flow between Alpha and Beta channels.

Since Air Flow measurement is carried out by electronic flow meter, conventional Rotameters are not required in the air line. Air flow is adjusted by the vent valves provided at the inlet side of the pump(s).

Elegant yet simple, design of CAM enables user to change the filter paper(s) without disturbing the detector mounting arrangement. Air Sampling Pumps are rated for continuous operation. Rotameter flow measurement is also possible as an alternative to electronic flow measurement.

CAM is also available in only Alpha, only Beta or both Alpha and Beta versions.

Specifications:

Parameter CAM A / B
CAM A CAM B
No. of Channels 2” dia ZnS(Ag) Scintillator on 2” dia PMT 20 mm dia End Mica Window GM tube with 25 mm thick lead shield
Filter Paper Arrangement 2” dia filter paper mounting, with easy-to-replace filter holder in sampling system for Alpha Channel 2” dia filter paper mounting, with easy-to-replace filter holder in sampling system for Beta Channel
Flow Measurement Electronic or by Rotameter (0 to 100 LPM Range) Electronic or by Rotameter (0 to 100 LPM Range)
Air Sampling Continuous rated air sampling pump (100 LPM) for Alpha channel Continuous rated air sampling pump (100 LPM) for Beta channel
HV supply 0 to 1000V preset for alpha channel 0 to 1000V preset for beta channel
Display 6 digit LED for CPM
4 x 20 Char large LCD for
Bq/M3,Flow,Alarm Levels
6 digit LED for CPM
4 x 20 Char larg LCD for
Bq/M3,Flow,Alarm Levels
Ranges 50, 500, 5000 or 50000 CPM settable 50, 500, 5000 or 50000 CPM settable
Calibration Air Flow and Counting Efficiency Air Flow and Counting Efficiency
Alarms Green / Red Tower Lamps with audio alarm Green / Red Tower Lamps with audio alarm
Alarm Setting Warning and High CPM Alarm Warning and High CPM Alarm
Low and High for Air Flow Low and High for Air Flow
Outputs Potential free Relay contacts,
4-20mA Output
RS-485(Modbus)/RS-232
Potential free Relay contacts,
4-20mA Output
RS-485(Modbus)/RS-232
Air Flow Pump Independent pump 126 LPM open flow with silencer Independent pump 126 LPM open flow with silencer
Flow Control By Vent Valve with inlet air filter By Vent Valve with inlet air filter
Mechanical Enclosure Powder coated MS Trolley on caster wheels Powder coated MS Trolley on caster wheels
Power 230V / 50 Hz AC Mains 230V / 50 Hz AC Mains

Top

ALCAM – Wall Mountable Continuous Air Monitor (Alpha Monitoring System)
Download Pdf

Wall Mountable Alpha in Air Monitor

Model ALCAM is a Continuous Air Monitoring system developed for alpha counting in air. ALCAM is designed and manufactured indigenously by Para Electronics Mfg. Division of Electronic Enterprises (I) Pvt Ltd for Continuous Monitoring of Alpha activity in the surrounding atmosphere.

Electronic flow measurement enables user to get the activity reading in Bq/M3, Time totalized air flow measurement provides information on the amount of air sampled in the given time. However, CAM system is also available with standard Rotameter type air flow measurement providing only CPM Display.

Model ALCAM provides inlet connection for connecting the air suction vacuum line. However, air sampling pump unit also can be supplied as an optional accessory. It is expected that the flow range should be between 40 to 70 LPM. Rotary vanes based dry pump with open air suction capacity up to 125 LPM is supplied for 24 hours nonstop operation as an optional accessory.

Connectivity of ALCAM to network or PC is provided through RS-485 / Ethernet. Modbus based Data Transfer software is supplied as an option. MODBUS protocol based registers’ output is made available for data transfer.

Wall mountable Continuous Air Monitoring System model ALCAM is supplied in rack. This rack (depth 23 cms) contains the 2” dia ZnS(Ag) Alpha detector on 2” dia PMT, Filter holder assembly, air flow measuring unit and electronic unit for display of Alpha activity.

Specifications:

Parameter ALCAM
No. of Channels Alpha
Detector 2” dia ZnS(Ag) Scintillator on 2” dia PMT
Filter Paper Arrangement 2” dia filter paper mounting, with easy-to-replace filter holder in sampling system for Alpha Channel
Flow Measurement Electronic or by Rotameter (0 to 100 LPM Range)
Air Sampling Continuous rated air sampling pump (100 LPM) for Alpha channel
HV supply 0 to 1000V preset for alpha channel
Display/td> 6 digit LED for CPM
4 x 20 Char large LCD for Bq/M3,Flow,Alarm Levels
Ranges 50, 500, 5000 or 50000 CPM settable
Calibration Air Flow and Counting Efficiency
Alarms Green / Red Cluster LEDs with audio alarm
Alarm Setting Warning and High CPM Alarm
Low and High for Air Flow
Outputs Potential free Relay contacts,
4-20mA Output
RS-485(Modbus) or Ethernet
Air Flow Pump (optional) Independent pump 126 LPM open flow with silencer
Flow Control By Vent Valve with inlet air filter
Mechanical Enclosure Powder coated Wall Mounting Rack ( 60 cm L x 23 cm W x 47 cm )
Power 230V / 50 Hz AC Mains

Top

Laundry Monitor
Download Pdf

Laundry Monitor is developed for manual monitoring of beta/gamma contamination of clothing like lab-coats (aprons), boiler suits, hand gloves or shoe covers used by personnel in radioactive area in nuclear power plants/research labs. Normally these clothing are checked for contamination and segregated into active and non-active lots before sending out of the plant for processing by plant laundry. It is a practice to check inward laundry also to confirm whether the cloths are non-contaminated before use.

Para Electronics has supplied laundry Monitors of different configurations i.e. BOX type or FLAT BED type. Both these configurations use energy compensated GM Tubes. However beta/gamma sensitive tubes also can be supplied.

BOX Type Laundry Monitor

In BOX Type Laundry Monitor the system has Detector Head (measurement zone) adequate for type of laundry to be monitored. The measurement zone is covered by set of thin walled GM Tubes to measure beta/gamma radiations from the laundry. Relevant processing electronics is housed around the measurement zone. Suitable LED indicators are provided around the measurement zone to indicate zonal contamination level or hot spots of the laundry being monitored. Alarms and contamination level is indicated on contamination monitor (main measuring instrument) in CPS value in accordance to the user specifications. The size and shape of the measurement zone, contamination level ranges and background activity subtraction can be suitably modified to any different requirements.

Detector Head

  • 18 energy compensated GM tubes
  • 6 HV supply and front end
  • Electronic circuit PCBs
  • Contamination Monitor with Analog readout
  • 0-500, 5K and 50 K CPS ranges
  • Audio/Visual alarm
  • Beta Gamma sensitive tubes as option
  • Background subtraction ON or OFF
  • Compact, easy to use
  • No Pulse, high counts, count rate alarms
  • Analog 0 to 207 degree meter indication
  • 240V AC mains operation
  • Alarm Settings : 0 to 100% of range

Flat Bed Type Laundry Monitor

FLAT BED type design employs 24 GM Tubes housed in 12 SS trays with lead lining. Each tray has HV supply and counting electronics for two tubes. The output from each tray is sent to the main counter unit which houses 12 independent counters. Background subtraction, No pulse Alarm, MIMIC Display and Audio/Visual Alarms are the standard features for Laundry Monitor. Automatic sensing of the laid cloth is detected by photo sensor and the counting is activated. MIMIC display gives indication of high contamination zones.

Specifications:

  • 24 energy compensated GM tubes housed in 12 SS trays
  • Separate HV supply 6 and front end electronics PCB per tray
  • Micro controller based counter with set up and operate mode
  • >240V AC mains operation
  • Counts from each tray are counted seperately
  • Audio/ Visual alarm
  • Alarm setting : 0 to 100% of range
  • Beta/ Gamma sensitive tubes as option
  • Background subtraction ON or OFF
  • MIMIC display for detection of high contamination zones

Top

Scrap Monitor
Download Pdf

Scrap Monitor Model PSM-1 developed by Para Electronics is to cater the requirement of monitoring scrap for possible gamma contamination. This Monitor employs 6 nos. of energy compensated GM tubes. These thin walled GM tubes will be mounted parallel to the length of the Scrap Monitor. The housing of these GM tubes can be moved vertically for a span of nearly 700 mm. It’s lower most position will be at 40 mm from ground level and the highest position will be at 300 mm .The output of these GM Tubes will be OR tied and will be fed to Scrap Monitor’s display unit. This display unit consists of Count Rate Meter, Audio / Visual settable alarms, facility to subtract background level. Count Rate Metering circuit has 3 Ranges namely, 0 to 500 CPS, 0 to 5000 CPS and 0 to 50000 CPS. The alarm level can be set between 0 to 100% of any range. Analog Meter with 2700 square dial will indicate the CPS level. The integration time can be set to either 1 sec or 5seconds. Alarm levels are indicated on the same meter by setting the band switch to appropriate position.

Contamination Monitor has a facility to subtract the background. It is possible to subtract the background upto 500 CPS. User can select background subtraction by setting background subtraction switch to ON position.

Typical Specifications :

Detector Head
Mechanical Dimensions : Overall Dimensions :
700 W x 500 H x 500 D mm (approx)
Detector Housing with Stainless Steel Bottom :
700 W x 500 H x 100 D mm (approx)
Detector(s) used : Thin walled Halogen quenched GM Tubes with overall length 280 mm and diameter 28 mm
No of GM Tubes : 6
HV Supply modules : One HV supply module per 3 GM tubes
No of HV modules : 2
HV Output : Internally settable up to +900 V
Detector Head Output : OR tied TTL output from all the GM tubes will be fed to the contamination monitor. All outputs will be effectively averaged over the integration time 6 core cable 3 meter long
Display Unit (Contamination Monitor)
Count Rate Ranges : 0 to 500 CPS, 0 to 5000 CPS, 0 to 50000 CPS
Three switch selectable ranges
Input : TTL Input pulses from Detector Head
Alarm Level : Settable Alarm Level between 0 to 100% of selected range
Alarm Level Adjust : Single turn potentiometer screw driver settable mounted on rear panel User can set Alarm Level between 0 to 100% of
selected range
Alarm Indication : Visual - RED flashing LED indicator
Audio – Audio Alarm
External – Relay change over contact
Alarm Acknowledge : Front panel mounted push switch to reset the audio alarm. Visual alarm will switch off when the contamination level goes below the set value
Integration Time : 1 or 10 seconds switch selectable
CRM Indication : 100 mm x 100 mm square, 0 to 2700 Analog Meter
Background Subtraction : 0 to 500 CPS settable by 10 turn helipot with graduated dial
Mechanical
Detector Head
Enclosure : Aluminum Powder Coated Box
Typical Dimensions : 807 W x 850 H x 400 D mm
Trolley Steel Frame with adjustable vertical height for detector head
Vertical Height Adjustment From 40 mm to 300 mm by a bevel gear arrangement
Contamination Monitor
Enclosure Aluminum Powder Coated Box
Dimensions 310 W x 150H x 280 D mm
Power : 240 V (+ 10 %) AC, 50 Hz Mains

Trey Up Position

Trey Down Position

Top

PFT-1 : Foot Monitor
Download Pdf

Foot Monitor Model PFT-1 manufactured by Para Electronics is developed to detect the nuclear contamination on the shoes. This unit is designed around 4 nos of thin walled GM tubes (typ1 719) for detection of beta/gamma contamination on the bottom of the footware. A pulse from each GM tube is counted independently before all the counts are added together to determine if the aggregate counts are below the set level. Counting time, Alarm level are user settable. Audio/Visual alarms are provided when the contamination level crosses the set limit. LCD menu display indicates the status of the contamination and is used for diagnostic purposes also. The detection of person's standing is done by the pulses from GM tubes.

GM tubes, 4 nos used in Model PFT-1 are surrounded by 6 mm thick lead shield. This reduces the background counts. Foot Monitor continuously counts the background counts and stores the latest background. These background counts are subtracted from the actual counts. Net counts are used fro alarm activation.

Typical Specifications :

Detector Assembly
Detectors : 4 nos of thin walled GM tubes type 719 or equivalent
( 2 GM tubes per foot)
Lead Shield : 6 mm thick lead shield on five sides around the GM tubes
S. S. Grill : On the top of the GM tubes
Light Switches : 2 nos to detect the standing of the person on the foot monitor
Counter / Alarm Assembly
Electronics : Micro controller based counter with 16x2 Line character LCD
menu display for counts and other messages
No. of Channels : 2 with separate counters
Timer : Settable between 1 to 99 seconds
Alarms : Audio and Visual
Alarm Setting : Settable upto 9999 counts/measurement
Background Subtraction : Selectable ON or OFF
General
Dimensions : 460 L x 470 W x 150 H mm
Weight : Approximately 25 Kg
Power : 240 V (+ 10 %) AC, 50 Hz (Single Phase)

Top

PAM-1 : Alpha Particulate Monitor
Download Pdf

Alpha Particulate Monitor Model PAM-1 developed by Para Electronics consists of following subsystems

  • Detector, Preamplifier, Filter Paper Holder
  • Instrument for data collection
  • Panel PC for display, operation control, data storage and communication
  • Vacuum pump
  • UPS

Complete system is assembled on a trolley. System consists of a detector, preamplifier with filter paper holder. Detector is Ion Implanted Silicon Detector.Pre-Amplifier is directly mounted on the detector.Active area of the detector faces the filter paper.Filter paper is kept inside the filter paper holder

Preamplifier requires +12V and -12V supply. Detector bias voltage is around 30 volts. Multicore cable with one coaxial is used to carry the necessary voltage and the preamplifier output between the preamplifier and the instrument. 6 pin allied connector is used at the instrument end. Cable is directly soldered to PCB at the preamplifier end.

Power supply for the instrument consists of +5V SMPS for digital circuits. For +12 and -12V, linear supply is used. Inside the instrument, there is a power supply card and the MCA card. Necessary bias for the detector is generated on the power supply card.
Preamplifier output first goes to spectroscopy amplifier. Rise time of the amplifier output is 1.2 uS. Amplifier output is then given to 10 bit Wilkinson type ADC. Necessary signals for control of ADC are generated by the main controller C8051F340. This controller also handles the USB communication with the panel PC. Spectrum collected by 1K channel MCA is first stored in the internal memory of the PC. Then after every second, the spectrum is transferred to software package which runs on the panel PC. The spectrum collected by the MCA is displayed on the PC screen. Many other features like data storage are available in the package.

Mains supply is routed through the spike guard. Vacuum pump is connected on the mains line whereas the instrument and the panel PC are connected to the UPS as shown the block diagram. UPS capacity is 500 VA. This gives backup time of at least 1 hour in case of power failure.

Vacuum pump capacity is 100 LPM. Normal suction rate through filter paper is 40 LPM. This generates back pressure on the pump and results in pump failure. Bypass valve is connected on the suction line of the pump as shown in the diagram to avoid the back pressure on the vacuum pump.

Specifications :
Air Monitor Detection Unit

1K MCA based Unit for detection of Alpha particles
Supply : 230V, 50 Hz Mains
Radiation Detection : 4.2 MeV to 8 MeV
System Resolution : 300 KeV
Display : In CPM and Bq/m3
Pre Amplifier
Detector Type : Ion Implanted Silicon Detector
Resolution : 20 KeV in Vacuum
Active Area : 450 mm2
Bias Voltage : +30 Volts
Pre Amplifier
Type : Low Noise Charge Sensitive Preamplifier
Output : 100 mV for 5.16 MeV
Gain : 600 mV/pC
Pulse Polarity : Positive
Interconnecting cable length between preamplifier and amplifier - 3 meters
Amplifier
Input : 0 to +500 mV
Output : 0 to + 5 Volts
Shaping : 1 uS, Near Gaussian shape
Gain : Variable through internal trimpot
HV
Range : 100 V
ADC
ADC Type : 10 Bit Wilkinson Type
ADC Range : 5 Volts
No. of Channels : 1024Secs
Display & Storage System / Panel PC
Industrial Panel PC or Laptop with Windows XP (License version) operating system for display of MCA spectrum, data analysis
and spectrum storage. PC will have RS232/RS485 or Ethernet port for data communication.
12” LCD Monitor for display.
Display Resolution At least 1024 x 760 pixels
Alarms
Warning Alarm Level & Final Alarm Levels settable in terms of Bq/m3.
Flow Meter
Digital Flow meter for flow rate measurement.
Range 0 to 100 LPM
Others
Temp. Range : 0 to 55O C
Air Sampling Unit
SS Air Sampling head capable of holding filter paper of 37 mm dia. Collection efficiency >95%.
Flow range 10 to 100 LPM
Filter Paper Millipore type. Wire mesh for supporting filter paper.
Vacuum Pump - Oil less, Capacity 100 LPM with 12.7mm dia inlet and outlet ports
Digital Flowmeter, range 0 to 100LPM for flow rate measurement.
Bypass valve for bypassing excess flow.
Suitable Trolley will be provided for entire system with grills for ventilation.

Top

Copyright © 2011 Electronic Enterprises (India) Private Limited