It is a surface sensor whose contact surface is formed in the form of a paddle.
This allows a good contact also e.g. on a curved cavity wall.
Normally the temperature sensor is a K-type (NiCr-Ni) probe with a temperature range between -50 °C and +400 °C.
It should be noted that a contact measurement always influences the measurement result and hence is less accurate.
The mold wall temperature can only be measured at one-point in order to obtain useful information.
It is important that the duration of the measuring is sufficiently long.

Paddle Thermometer in Plastic Industry

Measuring Technology: K-type paddle probe with miniature thermocouple plug.

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This glossary of plastic industry is provided by PLEXPERT Canada Inc.