描述
The SW series differential/pressure/vacuum switches have been designed for most industrial pressure measurement where-considering the quality performance, reliability and low cost.
The separated diaphragm design and connection can be used for gas and liquid applications. The material is available in brass, SS316, PP, PVC, PVDF for different media.
The precision snap-acting switches provide a narrow dead band and repeatability. A convenient, externally accessible adjust-ment screw is multi-turn to provide easy set point adjustability.
Typical Application
- Pressure differential between bottom and top of pressurized tank for liquid level measurement.
- Differential pressure on venture, orifice or other primary flow elements for flow rate measure-ment.
- Pump monitoring for hydronic heating and cooling systems in buildings.
- Improve efficiency by alerting operator of prob-lem conditions for heat exchangers.
- Valve backflow prevention to ensure the safety of public water supply.
- Filter/Strainer monitoring in water purification systems.
Specifications
PERFORMANCE
Set Point Repeatability: <±1.0% F.S
Typical Dead: < 2.0% F.S.
Thermal Effect: ± 0.1% F.S for 10 OC
ENVIRONMENTAL
Max Operating Temperature: -85 °C at 7 Bar
Ambient Temperature Range: 0…..+70 °C
Storage Temperature Range: -25…..+85 °C
Weatherproof Rating(Enclosure): IP65 for Cable Gland, M12 , DIN43650
PHYSICAL DATA
Material: Brass, 316SS, PP, PVC or PVDF
Connection: 1/8”PT-F, G1/8, 1/8”NPT, G1/4 or 1/4″NPT-F
Fitting: Brass Tongren 1/4” Tube, 316SS 1/4″ Tube, Plastic Push in 1/4″ Tube, PFA/PTFE/PVDF Thread Flare 1/4” Tube
Diaphragm Seal: Buna N, Vition, FFKM, Silicone, EPDM, CR
Mounting: Surface mount Surface mount with two screws through the holes
Electrical Connector: Cable Gland, DIN 43650A, M12 or Terminal Block
Max Working Pressure: 7 Bar
Proof Pressure: 10 Bar
Note:The wetted parts including fitting, diaphragm and sealing gasket will be contacted with the media direct-ly. Before installation, please check the wetted parts selected for compatibility to the process media.
ELECTRICAL DATA Voltage Output
Switch Output: SPDT precision snap action micro-switch, SPST(NO)/SPST(NC) is available on request
Rating: Rated to 5A at 125 VAC and 250 VAC, 1A/3A/10A rating is avaialble on request
Contact Resistance(Max): D.C. 30V 1A 30mOhms
Insulationon Resistance(Min): D.C. 500V 100MOhms
Withstand Voltage: A.C. 500V 1 minute