E-140
Survey Meter
Manufactured By: Eberline Instrument Corporation
Santa Fe, New Mexico
Indicates 0 - 50,000 CPM over three scales for beta.
This model also has a manually adjustable response time.
Uses (2) "D" size 1½ Volt Batteries and changeable probes with a BNC Connector.
Headphones also utilize a BNC connector.
Dimensions: 8" Long x 4¾" Wide (with speaker) x 7¼" Tall (with probe)
This unit is complete and working, although it is in rough shape.
Serial Number: 651
Shown with a Victoreen model 489-35 end window probe.
Close-up of Meter Face and External Speaker
Meter indicates in Counts Per Minute only.
Speaker has it's own on/off switch.
Inside View : Aluminum Case Bottom and Battery Holder
Speaker wire plugs into the circuit board above the batteries.
Inside Views: Left & Right Sides
Calibration Pots for the three scales.
x1 Scale on Left / x10 Scale in Middle / x100 Scale on Right