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Temperature monitoring system in tumblers for tanning

QUALITY CONTROL

REQUIREMENTS

The problem was to constantly monitor the temperature of the liquid inside tumblers during tanning, a chemical and mechanical process whereby leather becomes imputrescible and resistant to several substances.

The continuous rotary motion, the difficult conditions of the environment where monitoring should take place, and the need of frequent temperature measurements required applying a measuring device inside the tumbler, capable of wireless transmission to the outside without being powered by a fixed network or batteries.

SOLUTION

To meet this need, TERTIUM Technology developed a solution with the GreenSensing  platform based on ZPW (Zero Power Wireless) technology. To monitor the liquid’s temperature effectively, a Greensensing PT100 a transponder that reads PT100 temperature probes was placed on each tumbler.

This device has no on-board batteries and is activated only when stimulated by the reader. Its function is to log data from the temperature probe (placed through a hole in the tumbler) and transmit them by radio to the reader continuously as long as it is powered. The GreenSensing reader is placed near the tumblers’ structure to read data every time the transponder approaches it (approximately 5 cm when the transponder is closest). Each log is then transmitted by the reader by serial interface to the machinery’s control unit.

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