Large Area Tritium Detector - Model 44-110
CE Seal
Specifications

INDICATED USE: tritium surface survey/windowless beta survey is designed to be placed on a flat surface and then purged with P-10 gas for 20 seconds before counting
DETECTOR: windowless gas flow proportional
RECOMMENDED COUNTING GAS: P-10 (10% methane, 90% argon)
GAS PURGE TIME: approximately 20 seconds
WINDOW: windowless
WINDOW AREA: 126 cm² (19.5 in²) active; 100 cm² (15.5 in²) open
EFFICIENCY (4π): 25% for ³H
BACKGROUND: typically 400 cpm
SUGGESTED INSTRUMENTS: Models 12, 2000, 2200, 2221, 2350-1, 177-61
OPERATING VOLTAGE: typically 1700 volts
COUNTER THRESHOLD SETTING: typically 4.0 mV
SIZE: 12.4 x 11.7 x 22.9 cm (4.9 x 4.6 x 9 in.) (H x W x L)
WEIGHT: 0.9 kg (2 lb)