In brief

The 120K series is undoubtedly the family of differential pressure switches that stands out for the choice of sensors and options available in the field of hazardous area applications. The sensors are of the diaphragm and opposing bellows types. The latter also offer the option of having local differential pressure indicator, effectively turning it into two instruments in one.
In order to have high statics, it is necessary to prefer diaphragm sensors, with the possibility of reaching 83 bar and being able to choose from Teflon® ,Viton® and BUNA N in addition to AISI 316 metal parts. There is a choice of models with one or two independent SPDT microswitches and internal or externally protected, double-scale regulation. Microswitches of various characteristics can be supplied, including models with 20A or 30A rating on the contacts. Many certifications, for use in Europe, Eurasian Confederation, South Korea, China, Ukraina, NorthAmerica, Canada, Brazil, India, UAE and all countries that recognize IECEx International certification. SIL approval makes them suitable for use in Safety Instrumented Systems (SIS).