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 from common isotopes to calculate activity in Bq and DPM. The detector is internally 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.).
The Ranger EXP is externally 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.).
Operating Range:
- mR/hr - .001 (1µR) to 100
- CPM - 0 to 350,000
- µSv/hr - .01 to 1000
- CPS - 0 to 5000
- Total Counts- 1 to 9,999,000 counts
- Accuracy (Referenced to Cs137)
- Typically ±15% from factory, ±10% with NIST Source Calibration
Energy Sensitivity:
- Detects Alpha down to 2 MeV.
- Detects Beta down to .16 MeV; typical detection efficiency at 1 MeV is approx. 25%.
- Detects Gamma down to 10 KeV through the detector window. 3340 CPM/mR/hr (137Cs).
- Smallest detectable level for 125I is .02 µCi at contact.
Built-In Efficiencies:
- Sulfur (35S)
- Strontium (90Sr/y)
- Cesium (137Cs)
- Phosphorus (32P)
- Carbon (14C)
- Iodine (131I)
- Cobalt (60Co)
- Alpha
Selectable Alert Set Range:
- mR/hr .001 - 50 and CPM 1 - 160,000.
- 70db @ 1m. Pulsating beeper sounds the alert.
- Adjustable alert levels are used for mR/hr / CPM, and µSv/hr / CPS.
- Alarm will sound when in Timer Mode when set alarm threshold is reached.
Anti-Saturation:
- Meter will hold at OVER RANGE in fields as high as 100 times the maximum reading.
Averaging Periods:
- Display updates every 3 seconds.
- At low background levels, the update is the average for the past 30-second time period. The timed period for the average decreases as the radiation level increases.
Additional features:
- Graphic Display with Backlight
- Count Light
- Red LED flashes with each radiation event.
- Internally mounted beeper (can be switched off for silent operation)
- USB for use with Free Observer USB Software for PCs
- Power: Two AA alkaline batteries (included)
- Dimensions: 140 X 68 X 33 mm (5.5 X 2.7 X 1.3 in.)
- Includes:Carrying Case, Xtreme Boot, Stand, Mini-USB Cable, Observer USB Software Download , Certificate of Conformance
- 1 year limited warranty