ECL Model EC 6 "Bismo-Count" GM Detector (ca. 1955-1960)

ECL Model EC 6 "Bismo-Count" GM Detector (ca. 1955-1960)

The Model EC 6 "Bismo-Count" survey meter was built by Electronic Counter Laboratories Inc. at 418 South Pecan St., Los Angeles, California. It was primarily intended for uranium prospecting.

ECL Model EC 6 "Bismo-Count" GM Detector (ca. 1955-1960)

The fact that it is called the Bismo-Count indicates that it used a Victoreen bismuth 6306 GM tube. Alas, the tube is missing in this example. Even though the 6306 was more sensitive than Victoreen's 1B85 (used in ECL's Electro-Count), the range of the Electro-Count and the Bismo-Count are the same. They also employ the same count rate to exposure rate calibration (400 cpm = 0.1 mR/hr).

Detector: GM tube

Range: 0-0.2, 0-2.0 and 0-20.0 mR/hr

Audio: Speaker

Size: 4.5" x 9.5" x 5"

Batteries: One 22.5 volt (e.g., Eveready 412) two 45 volt (e.g., Eveready 455) and four 1.5 volt D cells

Price: $159.50

Kindly donated by Chuck Abraham.


Electronic Counter Laboratories Inc. Operation Manual. No date.