Type series DNMFEMA菲玛压力开关DNM025 All parts of the DNM series of Fema pressure switches which come into contact with the medium are made of stainless steel. The pressure sensor is welded without added material. Range of Switching Max. Materials Type adjustment difference allowable (Mean value) pressure Switching difference not adjustable 1 – 10 bar 0.15 bar 16 bar 1.4104 + Ex-DNM 10 16 – 63 bar 1.0 bar 130 bar 1.4571 Ex-DNM 63 -version · Degree of protection EEx de IIC T6 DNM 025 Ex-DNM 10 Range of Switching Max. Materials Type adjustment difference allowable (Mean value) pressure Switching difference not adjustable 0.04 – 0.25 bar 0.03 bar 6 bar 1.4104 + DNM 025 1.4571 Pressure switches with sensor system in stainless steel version Application Fema pressure switches to control a minimum pressure value by switching on/off a supply pump. Level control in a cooling sy