Fema DDCM252 pressure switch

Honeywell Fema DDCM252 differential pressure switch suitable for monitoring and controlling differential pressures, flow monitoring and automatic control of filter systems. A double chamber system with stainless steel bellows or Perbunan diaphragm accurately detects the difference between the two applied pressures. The desired switching pressure is continuously adjustable within the ranges mentioned in the type summary. The settings relate to the lower switching point (with falling differential pressure). The upper switching point (with rising differential pressure) is higher by the amount of the switching differential.

All Honeywell DDCM252 gas pressure switches can also be used in the vacuum range. Every Honeywell DDCM252 pressure switch has two pressure connections with appropriate markings.

Fema DDCM252 gas pressure switch technical data:

• Setting range: 4-25 mbar
• Switching differential: 2 mbar
• Maximum working pressure: 0.5 mbar
• Pressure connection: Internal thread G 1/4
• Switching device: Robust housing (200) made of seawater-resistant diecast aluminium GD Al Si 12
• Degree of protection: IP 54, in vertical position
• Mounting position: vertically upright
• Ambient temperature at switching device –25…+70 °C
• medium temperature: The maximum medium temperature at the pressure sensor must not exceed the permitted ambient temperature at the switching device. Temperatures may reach 85°C for short periods. Higher medium temperatures are possible provided the above limit values for the switching device are ensured by suitable measures (e.g. siphon)
• Mounting: Directly on the pressure line or on a flat surface with two 4 mm Ø screws
• Switching pressure: Adjustable from outside with screwdriver
• Switching differential: Not adjustable