A/CP-S-4X - The polycarbonate NEMA 4X strap on configuration has a sensor potted to the back side of a copper plate and a foam pad creates compression when the strap worm drives are tightened. The final result is a good thermal transfer with pipes that range from 2 to 5" in diameter.  Sensor spec: 10K Ohms @ 77 Deg F (25 Deg C) Type II Thermistor. ACI Strap on temperature sensors are designed for HVAC or Building Automation Systems.  Specific applications include: chiller hot water system tank and boilers.

A/CP-S-GD - The galvanized metal strap on configuration has a sensor potted to the back side of a copper plate and a foam pad creates compression when the strap worm drive is tightened. The final result is a good thermal transfer with pipes that range from 2 to 5" in diameter.  Sensor specs: 10K Ohms @ 77 Deg F (25 Deg C) Type II Thermistor. ACI Strap on temperature sensors are designed for HVAC or Building Automation Systems.  Specific applications include: chiller hot water system tank and boilers.

A/CP-S-PB - Strap on sensor plastic enclosur 10K Ohms @ 77 Deg F (25 Deg C) Type II Thermistor. The plastic enclosure strap on configuration has a sensor potted to the back side of a copper plate and a foam pad creates compression when the strap worm drive is tightened. The final result is a good thermal transfer with pipes that range from 2 to 5" in diameter. Extra straps can be purchased for $1 and will be listed as an additional part number (2-5" HOSE CLAMP).  Please note that the plastic enclosure is rated to 140 degrees F. For higher temperature application the -GD enclosure option is recommended. ACI Strap on temperature sensors are designed for HVAC or Building Automation Systems.  Specific applications include: chiller hot water system tank and boilers.