The catalog number 836-NX18A is an order reference for a pressure switch component. This product is made by Allen-Bradley/Rockwell Automation in the 836 Pressure Controls series and it is designed for applications like monitoring of low and high pressure, low-pressure alerts, high-pressure alerts, liquid level control, air compressors, and compressed air monitor systems. The 836-NX18A pressure switch operates on an AC power source with a rating of 600 Volts. In addition to that, the unit has a current rating of 5 Amps. The supported actuator types are internal or external bellows. The bellows can be made from copper alloy or stainless-steel that is type 316 steel. The 836 series pressure controls can support adjustable differential pressure in the following ranges: 2 to 95 PSI, 0.2 to 125 PSI, and 0.4 to 80 PSI. The occasional surge pressure of these devices can be up to 650, 850, or 1600 PSI.

The Allen-Bradley/Rockwell Automation 836 Pressure Controls series that the 836-NX18A pressure switch is from offers 2 styles of pressure controls and enclosures that are Type 1, Type 4 & 13, Type 4X, and Type 7 & 9 and 4 & 13. The 836-NX18A pressure switch operates within a temperature range of -30 to 66 degrees Celsius (-22 to 150 degrees Fahrenheit) and it can be stored at temperatures from -30 to 93 degrees Celsius (-22 to 200 degrees Fahrenheit). The unit weighs around 1.36 kilograms or 3 pounds. The 836-NX18A pressure switch and the other pressure devices from the series support the following connections: the seven-sixteenth-inch 20 SAE flare for quarter-inch copper tubing, quarter-inch NPTF internal pipe thread, or three-eighth-inch NPSF internal pipe connections along with quarter-inch NPTF internal pipe thread.