Internal Halogen-quenched, uncompensated GM tube with thin mica window, 1.4-2.0 mg/cm2 areal density. Effective diameter of window is 45 mm (1.77 in.). Radiation symbol on front label marks the center of the detector.
Display will update every 3 seconds. At low background levels, the update is the moving average for the past 30-second time period. The timed period for the moving average decreases as the radiation level increases.
mR/hr - .001 (1µR) to 100 CPM - 0 to 350,000
µSv/hr - .01 to 1000 CPS - 0 to 5000 Total/Timer - 1 to 9,999,000 counts
(Referenced to Cs137) Typically ±15% from factory, ±10% with NIST Source Calibration
140 X 68 X 33 mm (5.5 X 2.7 X 1.3 in.)
3340 CPM/mR/hr referenced to Cs137
Detects Alpha down to 2MeV.
Detects Beta down to .16 MeV; typical detection efficiency at 1 MeV isapprox. 25%.
Detects Gamma down to 10 KeV through the end window. Smallest detectable level for I125 is .02 µCi at contact.
5 Sulfur (S35), 90 Strontium (Sr/y90), 137 Cesium
(Cs137), 32 Phosphorus (P32), 14 Carbon (C14),
131 Iodine (I131), 60 Cobalt (Co60), and Alpha
Backlit Graphic LCD with Backlight
Red LED fashes with each radiation event.
mR/hr .001 - 50 and CPM 1 - 160,000. 70db @ 1m.
Internally mounted beeper (can be switched off for silent operation)
USB for use with Observer USB Software Family
Meter will hold at full scale in fields as high as 100 times the maximum reading.
Two AA alkaline batteries
Carrying Case, Xtreme Boot, Stand, Mini-USB Cable, Observer USB Software Download , Certificate of Conformance
Wipe Test Plate, Swipes, NIST Calibration
1 year limited
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!
The Monitor 200 measures alpha, beta, gamma, and x-rays. Its digital display shows readings in your choice of CPM, CPS, μSv/ hr, mR/hr, or in accumulated counts. It has a digital display, a red count light, and a beeper that sounds with each count detected. Other features include an adjustable timer, and selectable alert. With the free Observer USB Software Family, you can set computer alarms, calibrate your instrument, and download your collected data from the internal memory for easy reporting!
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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.