Check the listing for details. Eberline HP-210T Tungsten Shielded GM Probe. Condition: Used. Listed at 385.00 USD. HP-210T Tungsten Shielded GM Pancake type probeEfficiencyBeta: With Screen: 22% 13cCs, 16% 60Co, 32% 90Sr/90Y, 15% 99Tc, 6% 14Cs; Without Screen: 33% 13cCs, 22% 60Co, 37% 90Sr/90Y, 20% 99Tc, 9% 14CsWindow Size1.75 in.Weight (English)1.5 lb.Weight (Metric)0.7kgDescriptionTungsten shieldSensitivityAlpha: 3MeV at windowTemperature (English) Operating-22° to +167°FTemperature (Metric) Operating-30° to +75°CThickness (Metric) Window1.4 to 2.0mg/cm²Power Supply900 ± 50VItem DescriptionTungsten shield; BNC connector Add a Counts.Pro for $499 to turn your current meter into a digital scaler/ratemeter/cloud connected datalogger that records your entire survey for complete and easy archival and documentation. See Ebay Item 401468071255 for details. For internal use: 5 Multiple barcodes Shelf 8B