TM-902C this is originally electronic design of Lutron Taiwan, and is available for more than twenty years.
Oldest revision this had adjustable Cold-junction with external pot.
Modernized revision this has automatic Cold-junction compensation.
Thermometer specification:Temperature range: -50ºC to 1300ºC
Resolution: 0.1ºC, 1ºC
Accuracy: 0ºC to 1300ºC (+0.75% +1ºC)
Working temperature: 0ºC to 50ºC
Storage temperature: -30ºC to 60ºC
Power supply: 9V battery (not included)
Weight with battery: 104g
Connection: mini K type (flat pins)
Size: 20x70x105mm
Price point starts from 2.5 Euro, TM-902C + One Thermocouple wire for 250C max (sensor bead type).
(But you may add to it better ones and professionally made probes: Immersion type / surface type etc etc ..)
What kicked my curiosity about this TM-902C / Lutron branded, is the label
at the back.
By 99% this has
identical format with the label of RST FG-100 which this is a soldering tip thermometer.
https://www.ittsb.eu/forum/index.php?topic=1873.0And now they are good chances both to come out from the same factory.
And here comes the NEW question: Made in Taiwan or China?