Fema Differential pressure switch for liquid, gas (DDCM) For flow monitoring and differential pressure control of steam, gas, hot/cold water and automatic checking of filter plant. Kind of pressure: differential pressure, relative Pressure connection: internal thread G1/4 Electrical connection: Plug DIN EN 175301 Protection class: IP54 Housing material: rugged housing of seawater resistant aluminium die casting GD Al Si 12 Media temp.: -25...70C Media temp. limit: temperatures up to 85 oC are allowable for short periods. Higher temperatures are possible, provided that the limit is safeguarded by suitable measures (e.g. water tube trap, see Accessories for Pressure Switches / Transmitters) Ambient temperature: -25...70C Ambient temp. limit: at temperatures below 0 oC, ensure that no water condensation can arise in the sensor and in the switching device Switch function/capacity: SPDT Microswitch; capacity 5 A inductive, 8 A resistive Optional functions: add the type numbers below to the listed type numbers for extra functionality as described -301: terminal connection housing, IP65 -205: maximum limiter with reclosing lock-out, interlocking with increasing pressure -206: Minimum limiter with reclosing lock-out, interlocking with falling pressure -307: two microswitches, switching in parallel or in succession, fixed switching interval, terminal connection case, IP65 (with the exception of DDCM252, 662, 1602, 6002) -217: two microswitches, 1 plug, switching in succession, adjustable switching interval (with the exception of DDCM252, 662, 1602, 6002) -213: gold-plated contacts, switching capacity: max. 24 Vdc, 100 mA, min. 5 Vdc, 2 mA. And others not available with adjustable switching difference. -351: protection class IP65 and switching housing with surface protection (chemical version) -513: gold-plated contacts, switching differential permanent, IP65, switching capacity: max. 24 Vdc, 100 mA, min. 5 Vdc, 2 mA; suitable isolating switching amplifier necessary, degree of protection Ex-i Certificates: SIL2 according IEC 61508-2