ACI Series Sensors are designed specifically for HVAC system temperature control. The strap-on sensors come in thermistor and RTD sensor curves compatible with most BAS systems available today. Strap-on sensors come with a handy box and stainless steel strap for 5" (12.7 cm) pipes. The ACI Strap-On Sensor mounts directly to a 2" to 5" (5.1 to 12.7 cm) pipe. Clean off any insulation or rust to promote solid contact of the copper plate to the pipe. Wrap and tighten the strap around the pipe and compress the foam fully for a firm mount. Faster response can be achieved by using TCC- 12 thermal conductive compound.