Accurately and economically sense and record surface temperatures. Each recorder contains sealed temperature-sensitive chemical indicators which turn permanently and irreversibly from silver to black at the calibrated temperature. Response time is less than 1 second with an accuracy of ±1% or 2% depending on the temperature rating.

The miniature size, weight and thickness (nominal 0.01″) of the labels allow installation in areas and on parts which are not practical for other instruments.

Models from 100ºF to 500ºF (38ºC to 260ºC) are available.