Fema VNM111-513 pressure switch

Fema VNM111-513 pressure switches detect the pressure difference relative to the atmospheric pressure. All data on switching pressure ranges and therefore the scale divisions on the switch units are to be understood as the difference in pressure between the atmospheric pressure at any one time and the set switching pressure. The “zero” reference point on the scale of the unit corresponds to the atmospheric pressure at the time.

Honeywell VNM111-513 pressure switch technical data:

• Setting range: -1-0.1 bar
• Switching differential: 50 mbar
• Maximum working pressure: 6 bar