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Technical Data

Digital Contamination Monitor (Micro) Type CM 710P designed, manufactured and supplied by Nucleonix Systems is a state-of-art, microcontroller based unit which essentially serves as a low level alarming survey meter cum Beta contamination monitor. Unit can measure Alpha, Beta, Gamma & X-rays. Alpha & beta is measured in CPS or CPM & gamma & X-Rays are measured in dose mode. Unit is calibrated using a standard CS - 137 calibration device.
It measures contamination in CPS or CPM mode and low level gamma dose rate in mR/hr / µSv/h
It has lot of unique features which include user interface, through a set of four command buttons & the visual indication to the user is on 16x2 LCD dotmatrix display module. This unit has preset alarm facility which can be set throughout the range of the instrument. Unit can store upto 1000 readings and stored data can be downloaded into PC using data communication software, through built-in RS232 serial port.


  • Conforms to ANSI N42.17A performance specifications for Health Physics instrumentation (portable) & compliant.
  • Microcontroller based design.
  • Compact, Elegant and light weight.
  • External probe with cover for Beta / Gamma selection.
  • Measures dose rate in mR/hr / µSv/h & countrate in cps / cpm.
  • Calibration Accuracy +/-10% with Cs-137.
  • Unit works on 6V, dry cells (4x1.5V).
  • RTC for time stamp of each reading.

Digital Contamination Monitor


Type : Pancake GM detector
Dimension : 50mm dia
Sensitivity (Approx) : 60 cps/mR/h

Detector Probe
This consists of Pancake GM detector housed inside a cylindrical housing with handle. Probe is fixed into a side clamp on one side of the instrument. This housing is provided with cap for Beta/Gamma selection.
Radiation detected

Alpha, Beta, Gamma, X-rays

Measurement Unit
mR/h / mSv/h / cps / cpm
Measuring ranges
(a) Dose rate : 0 - 500 mR/h (or) 0 - 5000 mSv/h
(b) Count rate : 0 - 99999 cps (or) 0 - 99999 cpm
Display Resolution
0.01 mR/hr or 0.1 mSv/h
Preset alarm range
0 - 500 mR/h (or) 0 - 5000 mSv/h (or) 0 - 99999 cps (or) 0 - 99999 cpm.
Over range
Senses over range & shows on display.
Built-in piezo buzzer provides beeps for every detected pulse and alarm o/p for preset alarms.
Time Constant (TC)
User has a choice of three TC’s LO (2 sec), MED (4 sec) & HI (8 sec).
+/- 10% with Cs-137.
Display Indication
16x2 backlit LCD display for showing doserate/countrate apart from textual screens during configuration.
Data Storage
Can store upto 1000 readings. Stored data can be recalled back on to display or transmitted to PC through serial port.
Serial port / data communication
Built-in serial port facilitates data downloaing into PC. Data communication software with connecting cable can be provided at extra cost .
User Interface
START, STOP, PROG, STORE,INC & DEC are the six control buttons provided on the instrument. The above buttons allow the user to program and operate the instruments in appropriate manner.
Real time stamp recorded with each reading.
Fault Diagnostics
Low battery indication is provided on the display.
6 Volts, DC, size AA, MN1500 LR6 (4 X 1.5 Volts), Alkaline cells.
  • Serves as a low level contamination measuring unit to check for α & β contamination in CPS,CPM modes, in Nuclear & Radio logical facilities ,Radiotherapy & Nuclear medical depts., PET-CT centres,medicine cyclotrons etc. It can also measure low level gamma dose rates at these facilities

  • Contamination of hands, clothing, work areas, flooring, surface contamination of source housings ,surface, ports of therapy machines, industrial sources etc can be measured.

  • Facilities counting of wipe test ‘smears' of (1 3/4 “ ) dia cloth discs.
  • Type test compliance
    a) Conforms to ANSI N42.17A performance specifications for Health Physics instrumentation (portable)
    b) compliant
    106W x 196L x 100Ht in mm (Approx.)
    Plot No.162 A & B, Phase-II, IDA, Cherlapally, Hyderabad-500051 India Phone: +91-7207034546, +91-7331104481, 7331104482, Fax : 040 - 29706486.
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