Thermo Electric MiniMite Pyrometer or null indicator for DHT tube amplifier.

VINTAGE THERMO ELECTRIC MINIMITE POTENTIOMETER PYROMETER INDICATING 80200

Vintage Pocket Probe Pyrometer LTI Corp Model NMP*USA Made Temp Range

Advance Trades School Analog Pyrometer Temperature Tester Leather Case

Vintage Pocket-Probe® Analog Pyrometer With Two Coil Surface Sensor [A1B1]

Alnor Al Temp II 7960F Digital Pyrometer Thermometer w/ New Battery Lead TESTED

EDL Pyrometer Pocket-Probe Model IP-A80 Temperature Range 0-600°F w/Metal Case

Vintage Alnor Portable Pyrometer