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SCH-VCM/SCH-VNM Vacuum Switch
Brand: KOBOLD Instruments, Inc
The negative pressure switches detect the pressure difference relative to the atmospheric pressure.
All data on switching pressure ranges and therefore also the scale division the switch units are to be understood at 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. The minus sign by the indicated pressure stand for under-pressure below the respective atmospheric pressure.
1 - 11 of 11 Part Numbers
SCH-VCM 095
- Switching Difference - Non-Adjustable
- Adjustable Range - -0.9 to 0.5 bar
SCH-VCM 101
- Switching Difference - Non-Adjustable
- Adjustable Range - -1 to 0.1 mbar
SCH-VCM 301
- Switching Difference - Non-Adjustable
- Adjustable Range - -250 to 100 mbar
SCH-VCM 4156
- Switching Difference - Non-Adjustable
- Adjustable Range - -15 to 6 mbar
SCH-VCMV 095
- Switching Difference - Adjustable
- Adjustable Range - -0.9 to 0.5 bar
SCH-VCMV 101
- Switching Difference - Adjustable
- Adjustable Range - -1 to 0.1 bar
SCH-VCMV 301
- Switching Difference - Adjustable
- Adjustable Range - -250 to 100 mbar
SCH-VNM 111
- Switching Difference - Non-Adjustable
- Adjustable Range - -1 to 0.1 mbar
SCH-VNM 301
- Switching Difference - Non-Adjustable
- Adjustable Range - -250 to 100 mbar
SCH-VNMV 111
- Switching Difference - Adjustable
- Adjustable Range - -1 to 0.1 bar
SCH-VNMV 301
- Switching Difference - Adjustable
- Adjustable Range - -250 to 100 mbar
1 - 11 of 11 Part Numbers
Specifications
Brand
Ambient Temperature Range
- -25° to 70° C (-13° to 158° F) - Max.
BSP Connection
- External Thread G 1/2” A (Pressure Gauge Connection) According to DIN 16 288
- Internal Thread G 1/4” to ISO 228
Diaphragm Material
- NBR
Element
- 304L Stainless Steel - Sensor Casing
- 316Ti Stainless Steel - Metal Bellows
- 430F Stainless Steel - Sensor Casing
- Cu Zn - Metal Bellow & Sensor Casing
Enclosure / Body Material
- Rugged Housing of Seawater Resistant Aluminum Die Casting GD Al Si 12 - Switching Device
Environmental Protection
- IP54, with Vertical Fitting Position
Mounting
- Vertically Upwards & Horizontal VCM 4156 Vertically Upwards
Process Fitting Details
- Directly in the Pressure Line (Pressure Gauge Connection) or on a Flat Surface with 2 - Off 4 mm Screws
Set Point - Decreasing
- bar: -1 to 0.5
- kPa: -100 to 50
- mbar: -1,000 to 500
- psi: -14.5 to 7.25
Set Point - Increasing
- bar: -1 to 0.5
- kPa: -100 to 50
- mbar: -1,000 to 500
- psi: -14.5 to 7.25
Switch Type
- Single-Pole Change-Over Switch
System Pressure
- bar: 6
- kPa: 600
- mbar: 6,000
- psi: 87
Temperature Range
- 85° C (185° F) - Max.