Fema VNM111 pressure switch

Honeywell VNM111 negative pressure switches measure pressure differences relative to atmospheric pressure. All specified switching pressure ranges and scale divisions should be interpreted as the difference between the atmospheric pressure and the set switching pressure. The “zero” point on the device’s scale represents the current atmospheric pressure.

Fema VNM111 differential pressure switch technical data:

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