A/1K-3W-O-4X - 1000 Ohms @ 32 degrees F ( platinum RTD sensing element) with a 0.00385 temperature coefficient. NEMA 4X rated enclosure with outside sensor probe.  Sensor Specs: 10K Ohms @ 77 Deg F (25 Deg C) Type II Thermistor

A/1K-3W-O-BB - 1000 Ohms @ 32 degrees F (platinum RTD sensing element) with a 0.00385 temperature coefficient in a three wire configuration. NEMA 3R (Bell Box) rated enclosure with outside sensor probe.  

A/1K-3W-O-EH - 1000 Ohms @ 32 degrees F ( platinum RTD sensing element) with a 0.00385 temperature coefficient. The standard outside air configuration is based on a European style enclosure that locks out moisture with a gasketed cover and watertight fitting. They are designed to be mounted flush to an exterior wall.

A/1K-3W-PBS - ACI's Low-Profile "Button" Sensor is designed to be aesthetically pleasing for higher profile applications. It's small size and appearance make it a perfect choice for applications where temperature sensors should blend into the background. Options include bras stainless stee or plastic for installation flexibility. Low profile blends into environment aesthetically. Available in Plastic Brass and Stainless Steel. Mounting Accessories include Etched Teflon lead wire Paintable

A/1K-3W-PM - The Pipe Mount probe is specially designed to fit pipe contours of 1? diameter or less.  The unique shape of the probe allows for a strap to securely install the sensor to against a pipe.  In addition the convex contour aids in the temperature transfer allowing for a more accurate signal.