If you need a simple way to monitor the temperature inside the case, three cheong instrument ST132 - 0600 thermocouple temperature transmitter compact structure, low price, provide 4 - loop power supply 20 ma output.
diameter of only 1 small disc type unit. 75 inches, can easily extend to - 40 to 80 & deg; C input. Only need to install the transmitter in the panel, and then sub input terminals can be in the absence of sensors measuring temperature environment. Then will be 4 - 20 ma output connected to the PLC, DCS, controller or recorder. You now have a low cost of chamber temperature sensor, including 4 - 20 ma output - with container 40 to 80 & deg; C is proportional to the. Don't need a thermocouple or other sensors.
this method USES ST132 transmitter inside the cold junction compensation sensor as temperature sensor. ST132 accuracy and stability, the most important is that the cost is low! Dc signal, far to the control room instrumentation for indicating, recording, adjusting. Composed of a variety of detection and control system. Widely used in industrial process control field.
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