RS485 4-20mA Digital Temperature Transmitters HVAC Description KTH500 temperature Transmitter Air Duct Mounted 4-20 mA Output Digital Temperature Transmitter IP65 KTH500 uses a new generation of digital sensors, with a temperature accuracy of 0.3C, harsh environment testing, aging testing and accuracy calibration before shipment to make the detection data more accurate and stable. KTH500 temperature transmitters can be used to measure temperature in various HVAC applications