The ACI Transmitter Copper Averaging Series features a two-wire, 4 mA to 20 mA loop powered output signal with an optional 3-Wire voltage output signal available

The Copper Averaging sensors are designed to be installed in medium to large ducts or air handling units where moisture, UV Light Air Treatment equipment, critical temperature control, higher corrosion resistance and faster response times when compared to similar Aluminum sensing elements

Copper has also been proven to provide an anti-bacterial effect on molds, fungus and other bacteria typically found in ducts

All transmitters include Zero and Span adjustments for field calibration and are calibrated using NIST Certified Calibration equipment

ACI recommends the use of an 1.02 mm (18 AWG) to 0.65 mm (22 AWG) shielded cable for all temperature transmitter installations to reduce the possibility of noise being introduced onto the signal lines

The 1k Ω Rigid Averaging sensor assemblies include a continuous sensing element the covers the entire length of the 2.44 m (8 ft) to 30.48 m (100 ft) sensing elements and are manufactured using Etched Teflon lead wires to differentiate between the different sensor types

All units are hermetically sealed using our epoxy material to eliminate the effects of moisture on the sensors

All Copper Averaging transmitters include a foam pad to properly seal the duct and limit vibration once installed

Optional NEMA/IP rated weather proof enclosures are available as specified on the back of the product data sheet

For best accuracy, ACI recommends the use of the A/TTM Series Matched transmitters with a 3 or 5 Point NIST Calibration Certificate, since they include a second calibration process in which the RTD and transmitter are calibrated together as a system.