Vintage Electronic Development Pocket Probe Analog Pyrometer

Description

Electronic Development Laboratories Pocket Probe. Brand new it sells for 5.00.
https://www.edl-inc.com/analogpocketprobe
This pocket probe appears to be in excellent condition. I do not know if it works or not.
EDL's Pocket-Probe Analog Pyrometers were developed in the 1960's. These long-time trusted pyrometers are dependable, compact, and portable temperature measuring instruments for industrial and laboratory use. EDL engineered an exclusive bi-metal and thermistor compensation network to automatically adjust for changes in room temperatures. This innovation distinguished the Pocket-Probe as the industry standard.
Pocket-Probe Analog pyrometers require no batteries for operation, thus eliminating potential sparks. This feature makes these instruments ideal for explosion hazard areas where fumes and gases may pose a potential safety issue. Unlike digital displays, you can visually track readings as they increase or decrease. Analog meters are not affected by RF noise and other electrical interference making these instruments immune to any adverse effects to readability and accuracy.