Description： 2 WIRES HUMIDITY TRANSMITTER Model : TR-RH2W * Range : 10 %RH to 95 %RH. * Output : 4 to 20 mA DC. 5.6 mA = 10 %RH, 12 mA = 50 %RH 16 mA = 75 %RH, 19 mA = 95 %RH * 2 wires, both for signal and power supply. * Precision capacitance type humidity sensor. * External zero and span adjustment. * Allow high cable load resistance, transmitter can install far away from the controller/incator. * Protection for the reverse wires connecting. * TR-RH2W can cooperate the "4-20 mA Controller/Alarm/Indicator" CT-2012, then become a humidity controller and the indicating system. The user can control and monitor the humidity value from far away.