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ENVIRONMENTAL Radiation DOSIMETER [ Type : ER 709 ] Print
Technical Data

Environmental Radiation Dosimeter Type ER 709 manufactured by NUCLEONIX SYSTEMS is exclusively designed to serve as a low level survey meter. It is an ideal choice for Environmental radiation monitoring and also for Geological prospecting for radioactive minerals. This unit employs microcontroller based design and has number of unique features. User can store upto 1000 readings and can recall back for visual indication on a dot matrix LCD display. This unit has preset alarm facility which can be set throughout the range of the instrument. This unit also has a built-in RS 232 port through which the stored data can be down loaded into PC. It is designed using a highly sensitive G.M. Detector and operates on 7.5V DC, dry cells.


  • Conforms to ANSI N42.17A performance specifications for Health Physics instrumentation (portable) & compliant.
  • Microcontroller based design.
  • Detects both Gamma & X-radiation.
  • Measures doserate in µR/h / µSv/h and countrate in CPS/CPM.
  • Accuracy +/-10% with Cs-137.
  • User can store upto 1000 readings
  • RTC time stamp for each reading.
  • Works on 7.5V DC, dry cells (5.x1.5V).
Radiation detected
Halogen quenched G.M. Detector GM132
Measurement Unit
µR/h or mSv/h
Measuring Ranges

Dose rate : 0 to 10,000 mR/hr or 0 to 100.00 msv/h.
Count rate : 0-99999 cps or 0-99999 cpm.

Display Indication
16 x 2 LCD dotmatrix display for showing doserate/countrate apart from textual screens during configuration.
Time Constant (TC)
User has choice of three time constants LO (25 sec), MED (50 sec), HI (75 sec)
+/-10% with Cs-137
Resolution (Senstivity)
1 mR/hr or 0.01 mSv/h
Preset Alarm Range
0-10000 µR/h (or) 0-100.00µSv/h (or) 0-99999cps (or) 0-99999 cpm
Built-in piezo buzzer generates beeps for every detected pulse and alarm o/p for preset alarms.
Data Storage
Can store upto 1000 readings. Stored data can be recalled on to display or transmitted to PC through serial port under program control.
Real time stamp recorded along with each reading.
User Interface
i) Power ON/OFF switch
ii) START, STOP, PROG, REC, INC, DEC command buttons for setting of parameters & operation of the instrument.
Serial Port / Data Communication
Built-in serial port facilitates data down loading into PC. Data Communication Software with connecting cable can be provided at extra cost as an additional option.
Fault Diagnostics
Low battery indication is provided on the display.
7.5 Volts, DC, size AA, MN1500 LR6 (5 X 1.5 Volts), Alkaline cells.
Type test compliance
a) Conforms to ANSI N42.17A performance specifications for Health Physics instrumentation (portable)
b) compliant
106W x 196L x 85Ht in mm (approx).
Plot No.162 A & B, Phase-II, IDA, Cherlapally, Hyderabad-500051 India Phone:+91-40-32918055, 32914548 Fax : 040 - 27262146
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