Halogen-quenched GM tube with thin mica end window. Mica window density 1.5-2.0 mg/cm2. Effective window diameter is .360 inch. Side wall is .012 inch thick.
mR/hr - .001 (1μR) to 200 mR/hr
μSv/hr - .01 to 2000
CPM - 0 to 214,000
CPS - 0 to 3575
Total/ Timer - 1 to 9,999,000 counts
Typically ±15% of reading. ±10% typical (NIST)
Internally mounted beeper (can be switched off for silent operation)
Red LED fashes with each count.
USB for Observer USB Software Family
1070 CPM/mR/hr referenced to Cs137
Detects alpha down to 2.5 MeV; typicaldetection efficiency at 3.6 MeV is greater than 80%.
Detects beta at 50 keV with typical35% detection efficiency.
Detects beta at 150 keV with typical 75% detection efficiency.
Detects gamma and x-rays down to 10 keV typical through the window, 40 keV minimum through the case.
Backlit Graphic LCD
Sounds with each count (can be switched off for silent operation)
Readout will hold at full scale in radiation fields as high as 100 times the maximum reading.
Power Requirements 2 AA alkaline batteries
Carrying Case, Xtreme Boot, Stand, Mini-USB Cable, Observer USB Software Download, Certificate of Conformance
1 year limited warranty
The Ranger EXP offers maximum performance in a lightweight, rugged solution for using your survey meter in the field. The Ranger EXP is designed specifically for individuals operating in tough environments. The small, handheld unit offers excellent sensitivity to low levels of alpha, beta, gamma, and x-rays. The digital readout is displayed with a red count light and a beeper sounds with each count detected. Other features include an adjustable timer, selectable alert, and with the free Observer USB Software Family, you can download your collected data, set alarms, and calibrate your meter!
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RDS-31 Multi-purpose Survey Meter is a small hand held, battery operated survey instrument using an energy compensated GM-tube as primary detector. Due to its versatile functions and durability it is suited for a wide range of applications e.g. in civil defense, industrial and laboratory use.
The Ranger offers maximum performance in a lightweight, rugged solution for surveying at the facility or in the field. The Ranger has been designed for industrial environments, but it still has all of the features you've come to love in the lab. The Ranger is a small, handheld, microprocessor-based instrument which offers excellent sensitivity to low levels of alpha, beta, gamma, and x-rays and has built in efficiencies for common isotopes to calculate activity in Bq and DPM. It has a backlit digital display, a red count light, and a beeper that sounds with each count detected. Other features include selectable alert levels, an adjustable timer, and an optional wipe test plate for swipes. Internal memory and the free Observer USB Software that allows you to download your data, set computer alarms, and calibrate your instrument!