The Johnson Controls humidity transmitter is based on a new ''state of the art'' humidity sensing element. It measures humidity over the entire range of 0 to 100% RH (non condensing) and has a wide operating temperature range. Its fast response, reliable long-term performance makes this transmitter well suited for refrigeration and HVAC installations. This range also includes models with an integrated temperature sensing element. It is recommended to use the humidity transmitter with Johnson Controls controllers such as the TC/SC/DC/DX-9100 series and System 27 Nova / MS series or with other systems having compatible
input and output voltages.The basic principle of this new humidity transmitter is a polymer capacitance type element in which capacitance changes proportionally to a change in humidity. This well proven technology is now combined with the signal processing electronics onto a single chip.The sensing element incorporates a protective coating which resists the effects of surface contamination.