Pocket Size Exposure & A/B/G Count Ratemeter

The Model 2401-EW instrument is a general purpose, pocket size radiation detection meter that employs an end-window type GM detector. The detector is conveniently packaged inside the instrument, with a protective screen covering located along the middle of the top end of the instrument. The meter presents two scales: CPM for contamination measurements, and mR/hr for exposure rate.

INDICATED USE: alpha, beta, gamma survey
RANGE: 0-200 mR/hr; 0-210,000 cpm
DETECTOR: 1.4 cm (0.57 in.) diameter end-window GM
SENSITIVITY: typically 1050 cpm/mR/hr (¹³⁷Cs gamma)
ENERGY RESPONSE: energy dependent
RESPONSE TIME: typically 11 seconds from 10% to 90% of final reading
METER DIAL: 0-2 mR/hr; 0-2.1 kcpm, BAT OK vMULTIPLIERS: x1, x10, and x100
AUDIO: click-per-event, may be turned off by moving selector to QUIET position
POWER: 9 volt battery
BATTERY LIFE: typically 250 hours with alkaline battery at normal background levels
CONSTRUCTION: drawn and cast aluminum, with membrane panel
SIZE: 4.6 x 8.4 x 13.5 cm (1.8 x 3.3 x 5.3 in.) (H x W x L)
WEIGHT: 0.4 kg (0.9 lb), including battery
ALARM: no

Pocket Size Exposure & A/B/G Count Ratemeter - Model 2401-EW