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TESTED Ludlum Model 25 Personal Radiation Monitor PRM Dose Rate Meter:
$149.00
Unit powers on and shows readings consistent with manufacturer parameters when checked against a known source.
Not calibrated and not certified. Buyer is responsible for calibration if needed.Check source is not included — photos with a Cs-137 disk are for demonstration only.Manufacturer specs (Model 25)
- Display range: 0.01 mR/h to 999 R/h
- Typical calibrated range: 2 mR/h to 999 R/h
- Accumulated dose: 0 to 999 R
- Detector: internal energy-compensated GM, HV ~550 V
- Energy range: ~60 keV–2 MeV (energy dependence typically within 15% of true value, 60 keV–3 MeV)
- Accuracy / linearity: within 10% of true value in calibrated range
- Gamma response: typically ~18 cpm per mR/h
- Display: 3½-digit backlit LCD (rate, accumulated dose, time remaining)
- Alarms: adjustable rate and dose alerts/alarms, detector-fail, low battery
- Power: 2 lithium coin cells; typical life ~6000 hours
- Temp: −40 to 65 °C (−40 to 150 °F)
- Construction: gasketed water-resistant plastic case
