https://www.rshudgins.com/Product/s/lYAazZ/TT820D-Thermocouple-Temperature-Transmitter
Intempco TT820D Thermocouple Temperature Transmit
Intempco TT820D Programmable Thermocouple Temperature Transmitter with 4-20 mA Output
intempcothermocoupletemperaturetransmit