F12131220434 is a Tecsis pressure switch used in many industrial applications. It is a highly accurate, adjustable, direct-acting pressure switch with a nominal rating of 1.6 to 16 bar, and a differential increment of 0.2 to 1.6 bar. It features an adjustable diaphragm-type sensing element and a hermetically sealed aluminum case with an age-resistant, dust-proof seal. It is also equipped with two normally open/closed SPDT contacts for control. This pressure switch is designed for use in steam and water systems, as well as for environmental appliances, pumps, compressors, and other industrial processes.