Description
The United Electric J21K-254 Differential Pressure Switch is used for HVAC systems with a pressure range of 0-90 PSI and a switch type of single pole double throw. It is an indoor unit that is housed in a NEMA 1 enclosure and is suitable for measuring air and fluid differential pressure in HVAC systems. It is used in air handlers, chillers, filters, and pumps to switch electrical circuits when certain pressure levels are attained to ensure proper system operation and avoid equipment failure. It has the advantage of improving the operation safety, promoting the efficient utilization of energy, and preventive control on the system, which makes it a useful product for the commercial and industrial HVAC systems.
