VCM VNM Negative Pressure Switches(Vacuum Switches)
Honeywell FEMA VCM/VNM Vacuum Switches – falling-pressure calibration, fixed (VCM) or adjustable (VCMV) differential.
Description
The Honeywell (FEMA) VCM/VNM Negative Pressure Switches (Vacuum Switches) detect pressure difference relative to atmospheric pressure – the “zero” scale reference point corresponds to current atmospheric pressure, with vacuum readings as a negative differential. Calibrated for falling pressure, so the adjustable switching pressure on the scale corresponds to the switching point as pressure falls; reset point is higher by the switching differential. Robust seawater-resistant die-cast aluminium (GD AlSi 12) housing. Standard VCM types have a fixed (non-adjustable) switching differential; VCMV variants offer an adjustable switching differential. Unlike the explosion-proof Ex-VCM/Ex-VNM series, this standard range isn’t ATEX/IECEx rated. Jaideo Automation supplies Honeywell building automation products across India – contact us with your project requirements for a quotation.
Brand
Honeywell
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