Sears Tower Model 6154 Pocket GM Meter (ca. 1955-1960)

This GM survey meter was manufactured for the Sears Roebuck Company by El-Tronics Inc. of Philadelphia.  A very similar instrument was sold under the El-Tronics name as the Model PR-1. The latter was described in a 1955 El-Tronics advertisement as follows: "Pocket Size Geiger Counter . . .Smallest, lowest priced Geiger Counter! Fits in pocket or clips to belt Radiation signals heard through earphone! Gold anodized aluminum case. Penlight battery. Model PR-1 - $21.95."

The photo to the right shows the original box that the instrument came in.

Detector: GM tube

Size:  ca. 4" x  2 1/4"  x  1 1/8"

Output:  headphone

Batteries: one 1 1/2 volt  AA battery

References  

Advertisement for El-Tronics PR-1. Saturday Evening Post. July 16,1955. Page 87.

Museum Directory               Survey Instruments

Last updated: 05/10/11
Copyright 1999, Oak Ridge Associated Universities