ACE AI-RHTx-D  Duct Mounting Temperature Humidity Transmitter  Duct Mounting Humidity Temperature Transmitter. Duct Mounted Humidity & Temperature Combination transmitters are highly accurate & stable sensors with a dual output of 4-20 mA. The capacitive basic sensor is not affected by condensation & gives top-of-the-line long-term stability   Features • No affect of condensation on output & stability using polymer capacitive sensor • Temperature compensated output • Dual Output of 4-20mA , 1 each for temperature & humidity