Detector Type: Geiger-Mueller (GM) tube.
Detection Area: 50 cm².
Radiation Types Detected: Alpha particles, Beta particles, X-rays, and Gamma rays.
Sensitivity: High sensitivity for detecting low levels of radiation.
Response Time: Fast response time, usually in the range of milliseconds.
Temperature Range: Operates effectively within a wide temperature range, often from -20°C to +50°C.

Similar probe to the Ludlum 44-94
One tube was replaced with a LND 7311 at the time of this picture.
Tested and working.

Internal Use:
Barcode: 9021979
3C