Autonomous, wireless temperature-related information transmitter for use in supply device of processing plant in industry, has thermal actuator exhibiting thermal expansion coefficient larger than that of thermoelectric transducer

摘要

The transmitter has an electronic component (11) to power a thermoelectric transducer, where the transmitter is partly extended into a process vessel (20) containing process fluid (21) whose temperature is to be measured. The transducer is fixed on a side of the vessel under force of a spring parallel to a thermal actuator arranged in a heat carrier (31). The temperature of the carrier is spanned within acceptable operating temperature range of the transducer by the actuator, where the actuator has a thermal expansion coefficient larger than that of the transducer.