The Ranger is equipped with a halogen-quenched Geiger-Müller tube with a thin mica window (45 mm diameter) for excellent sensitivity. It measures dose rate, count rate, and accumulated counts, with user-selectable alarm thresholds and an adjustable timer.
Measurement units include µSv/h, mR/h, CPM, CPS, and total counts, covering wide ranges up to 1000 µSv/h and 350,000 CPM. Built-in efficiencies for common isotopes (Cs-137, Co-60, Sr-90, P-32, I-131, C-14, S-35, etc.) allow direct activity calculations in Bq and DPM.
The instrument features a large backlit LCD, audible beeper, count light, memory functions, and averaging modes. Connectivity is ensured through USB and optional Bluetooth BLE, supported by the free Observer software suite. Optional accessories include a wipe test plate and rugged protective boot.
Specifications
- Detector: halogen-quenched GM tube, mica window 1.4–2.0 mg/cm², diameter 45 mm
- Measurement ranges: 0.001–100 mR/h; 0–350,000 CPM; 0.01–1000 µSv/h; 0–5000 CPS; 1–9,999,000 total counts
- Sensitivity: 3340 CPM/mR/h (Cs-137); alpha > 2 MeV; beta > 0.16 MeV; gamma > 10 keV
- Accuracy: ±15% (factory), ±10% with NIST calibration
- Anti-saturation: maintains full scale in fields up to 100× maximum reading
- Alarms: user-selectable thresholds, 70 dB beeper, silent mode option
- Display: graphic LCD with backlight, count light (red LED)
- Outputs: USB; optional Bluetooth BLE (RadResponder ready)
- Size: 140 × 68 × 33 mm
- Power supply: 2 × AA alkaline batteries
- Battery life: approx. 1000 h typical
- Operating temperature: –10 °C to +50 °CWeight: ≈ 300 g with batteries
- Included: carrying case, rugged boot, detector cover, stand, USB cable, software download, certificate of conformance
- Options: wipe test plate, swipes, NIST calibration, Bluetooth module
Models
- 010233 - Radiation Alert Ranger - Digital Survey Meter
