Astra Automatyka > Produkty > Sensors and transducers > Pressure > Negative pressure switches (vacuum switches) VCM and VNM HONEYWELL / FEMA
Negative pressure switches (vacuum switches) VCM and VNM HONEYWELL / FEMA

FEMA / Honeywell negative pressure switches VCM and VNM detect the pressure difference relative to atmospheric pressure. They are created to monitor vacuum of non-aggressive liquids and gaseous media....

FEMA / Honeywell negative pressure switches VCM and VNM detect the pressure difference relative to atmospheric pressure. They are created to monitor vacuum of non-aggressive liquids and gaseous media.


Product comparison
Type Setting range Switching differential Max. pressure
VCM095 -0.9 …+0.5 bar 50 mbar 3 bar
VCM095-206 -0.9 …+0.5 bar 50 mbar 3 bar
VCM095-213 -0.9 …+0.5 bar 50 mbar 3 bar
VCM095-301 -0.9 …+0.5 bar 50 mbar 3 bar
VCM095-303 -0.9 …+0.5 bar 50 mbar 3 bar
VCM095-513 -0.9 …+0.5 bar 50 mbar 3 bar
VCM101 -1 … +0.1 bar 45 bar 3 bar
VCM101-205 -1 … +0.1 bar 45 bar 3 bar
VCM101-206 -1 … +0.1 bar 45 bar 3 bar
VCM101-211 -1 … +0.1 bar 45 bar 3 bar
VCM101-213 -1 … +0.1 bar 45 bar 3 bar
VCM101-301 -1 … +0.1 bar 45 bar 3 bar
VCM101-303 -1 … +0.1 bar 45 bar 3 bar
VCM101-351 -1 … +0.1 bar 45 bar 3 bar
VCM101-363 -1 … +0.1 bar 45 bar 3 bar
VCM101-513 -1 … +0.1 bar 45 bar 3 bar
VCM301 -250 … +100 mbar 45 bar 3 bar
VCM301-206 -250 … +100 mbar 45 bar 3 bar
VCM301-213 -250 … +100 mbar 45 bar 3 bar
VCM301-305 -250 … +100 mbar 45 bar 3 bar
VCM301-306 -250 … +100 mbar 45 bar 3 bar
VCM301-313 -250 … +100 mbar 45 bar 3 bar
VCM301-351 -250 … +100 mbar 45 bar 3 bar
VCM301-513 -250 … +100 mbar 45 bar 3 bar
VCM4156 -15 … +6 mbar 2 mbar 1 bar
VCM4156-205 -15 … +6 mbar 2 mbar 1 bar
VCM4156-206 -15 … +6 mbar 2 mbar 1 bar
VCM4156-213 -15 … +6 mbar 2 mbar 1 bar
VCM4156-301 -15 … +6 mbar 2 mbar 1 bar
VCM4156-351 -15 … +6 mbar 2 mbar 1 bar
VCM4156-363 -15 … +6 mbar 2 mbar 1 bar
VCM4156-513 -15 … +6 mbar 2 mbar 1 bar
VCM4156-576 -15 … +6 mbar 2 mbar 1 bar
VCMV095 -0.9 …+0.5 bar 90-400 mbar 3 bar
VCMV101 -1 … +0.1 bar 80-350 mbar 3 bar
VCMV301 -250 … +100 mbar 30-200 mbar 1.5 bar
VNM111 -1 … +0.1 bar 50 bar 6 bar
VNM111-213 -1 … +0.1 bar 50 bar 6 bar
VNM111-313 -1 … +0.1 bar 50 bar 6 bar
VNM111-351 -1 … +0.1 bar 50 bar 6 bar
VNM111-513 -1 … +0.1 bar 50 bar 6 bar
VNM301 -250 … +100 mbar 45 bar 3 bar
VNM301-206 -250 … +100 mbar 45 bar 3 bar
VNM301-211 -250 … +100 mbar 45 bar 3 bar
VNM301-213 -250 … +100 mbar 45 bar 3 bar
VNM301-303 -250 … +100 mbar 45 bar 3 bar
VNM301-513 -250 … +100 mbar 45 bar 3 bar
VNMV111 -1 … +0.1 bar 50 bar 6 bar
VNMV301 -250 … +100 mbar 45 bar 3 bar
Add the type numbers below to the listed type numbers for extra functionality as described
-301: terminal connection housing, IP65
-307: two microswitches, switching in parallel or in succession, fixed switching interval, terminal connection case (with the exception of VCM4156), IP65
-217: two microswitches, 1 plug, switching in succession, adjustable switching interval (with the exception of VCM4156)
-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.
Negative pressure switches (vacuum switches) VCM and VNM HONEYWELL / FEMA

All data relating to the switching pressure ranges and thus also the scale divisions on the switching devices are to be understood as the difference in pressure between the relevant atmospheric pressure and the set switching pressure. The “zero” reference point on the scale of the unit corresponds to the relevant atmospheric pressure.

Parameter Value
Kind of pressure vacuum, relative
Pressure connection internal thread G¼, external thread G½
Electrical connection Plug DIN EN 175301
Plug DIN EN 175301 IP54
Housing material rugged housing of seawater resistant aluminium die casting GD Al Si 12.
Media temp. -25 ... 70°C
Media temp. limit temperatures up to 85°C 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 ... 70°C
Ambient temp. limit at temperatures below 0°C, ensure that no water condensation can arise in the sensor and in the switching device
Switch function/capacity SPDT Microswitch 250 VAC; 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
• 307: two microswitches, switching in parallel or in fixed switching interval, terminal connection case (with the exception of VCM4156), IP65
• 217: two microswitches, 1 plug, switching in succession,
adjustable switching interval (with the exception of VCM4156)
• -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
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