Ludlum Model 44-40 Lead Shielded pancake style GM ProbeLudlum Model 44 40 Specifications INDICATED USE: alpha, beta, gamma survey; sample counting DETECTOR: pancake type, halogen quenched GM WINDOW: 1. 7 + 0. 3 mg cm mica with stainless steel protective screen WINDOW AREA: 15. 51 cm (2. 4 in) active, 12. 26 cm (1. 9 in) open EFFICIENCY (4): 5% for 14C; 22% for 90Sr 90Y; 19% for 99Tc; 32% for 32P; 15% for 239Pu SENSITIVITY (137Cs gamma): 3300 cpm mR hr ENERGY RESPONSE: energy dependent, see curve below

Reconfiguration to non-latching can be accommodated via a minor internal change

Adapter Module Contains calibration data and high voltage settings for a specified probe

error proof scale

(Actual unit in photo gallery)

The instrument will take a background count and subtract it from the current count

Barcode 17053810 (41")

Stable Base Plate

Beta - Typically 400 cpm or less (10 micriR/hr field)

6 m (12 ft

csv format for easy use with no proprietary software requirements

● Active/Open Area (cm2): 15/12

Pro for $399 to digitize your surveys and turn your meter into a digital scaler/ratemeter/cloud connected datalogger