Pressure

H3 Series



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H3 Series

Differential Pressure Switches H3 Series

Differential Pressure Switches

 

The Dwyer H3 Series adjustable differential pressure switches actuate one or two single pole, double throw (SPDT) snap switches in response to increasing or decreasing pressure of compatible gases or liquids. Four field adjustable operating ranges are available allowing set-points up to 200 psid. All models are suitable for hazardous locations and also include weatherproof housings as detailed in the chart below. Read and understand instructions completely before proceeding with installation or operation.


Products

(Wholesale customers, log in for your special pricing)

QtyModelDescriptionIn StockList PriceInternet Price
H3A-1DC DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,545.30772.65
H3A-1DC-DRAIN DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,666.50833.25
H3A-1DC-MV DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,605.90802.95
H3A-1DC-VIT DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,555.40777.70
H3A-1DL DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,545.30772.65
H3A-1DL-DRAIN DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,666.50833.25
H3A-1DL-MV DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,605.90802.95
H3A-1DL-VIT DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,555.40777.70
H3A-1DT DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,666.50833.25
H3A-1DT-DRAIN DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,787.70893.85
H3A-1DT-MV DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,727.10863.55
H3A-1DT-VIT DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,676.60838.30
H3A-1SC DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,454.40727.20
H3A-1SC-DRAIN DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,575.60787.80
H3A-1SC-MV DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,484.70742.35
H3A-1SC-VIT DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,464.50732.25
H3A-1SL DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,454.40727.20
H3A-1SL-DRAIN DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,575.60787.80
H3A-1SL-MV DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,484.70742.35
H3A-1SL-VIT DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,464.50732.25
H3A-1ST DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,575.60787.80
H3A-1ST-DRAIN DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,696.80848.40
H3A-1ST-MV DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,605.90802.95
H3A-1ST-VIT DIFF PRESS SW, ADJUST, 10.00-180.00" WCINFO1,585.70792.85
H3A-2DC DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,545.30772.65
H3A-2DC-DRAIN DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,666.50833.25
H3A-2DC-MV DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,605.90802.95
H3A-2DC-VIT DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,555.40777.70
H3A-2DL DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,545.30772.65
H3A-2DL-DRAIN DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,666.50833.25
H3A-2DL-MV DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,605.90802.95
H3A-2DL-VIT DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,555.40777.70
H3A-2DT DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,666.50833.25
H3A-2DT-DRAIN DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,787.70893.85
H3A-2DT-MV DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,727.10863.55
H3A-2DT-VIT DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,676.60838.30
H3A-2SC DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,454.40727.20
H3A-2SC-DRAIN DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,575.60787.80
H3A-2SC-MV DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,484.70742.35
H3A-2SC-VIT DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,464.50732.25
H3A-2SL DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,454.40727.20
H3A-2SL-DRAIN DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,575.60787.80
H3A-2SL-MV DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,484.70742.35
H3A-2SL-VIT DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,464.50732.25
H3A-2ST DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,575.60787.80
H3A-2ST-DRAIN DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,696.80848.40
H3A-2ST-MV DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,605.90802.95
H3A-2ST-VIT DIFF PRESS SW, ADJUST, 0.5-15 PSIDINFO1,585.70792.85
H3A-3DC DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,545.30772.65
H3A-3DC-DRAIN DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,666.50833.25
H3A-3DC-MV DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,605.90802.95
H3A-3DC-VIT DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,555.40777.70
H3A-3DL DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,545.30772.65
H3A-3DL-DRAIN DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,666.50833.25
H3A-3DL-MV DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,605.90802.95
H3A-3DL-VIT DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,555.40777.70
H3A-3DT DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,666.50833.25
H3A-3DT-DRAIN DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,787.70893.85
H3A-3DT-MV DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,727.10863.55
H3A-3DT-VIT DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,676.60838.30
H3A-3SC DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,454.40727.20
H3A-3SC-DRAIN DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,575.60787.80
H3A-3SC-MV DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,484.70742.35
H3A-3SC-VIT DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,464.50732.25
H3A-3SL DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,454.40727.20
H3A-3SL-DRAIN DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,575.60787.80
H3A-3SL-MV DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,484.70742.35
H3A-3SL-VIT DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,464.50732.25
H3A-3ST DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,575.60787.80
H3A-3ST-DRAIN DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,696.80848.40
H3A-3ST-MV DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,605.90802.95
H3A-3ST-VIT DIFF PRESS SW, ADJUST, 5-70 PSIDINFO1,585.70792.85
H3A-4DC DIFF PRESS SW, ADJUST, 0-200 PSIDINFO1,545.30772.65
H3A-4DC-DRAIN DIFF PRESS SW, ADJUST, 0-200 PSIDINFO1,666.50833.25
H3A-4DC-MV DIFF PRESS SW, ADJUST, 0-200 PSIDINFO1,605.90802.95
H3A-4DC-VIT DIFF PRESS SW, ADJUST, 0-200 PSIDINFO1,555.40777.70
H3A-4DL DIFF PRESS SW, ADJUST, 0-200 PSIDINFO1,545.30772.65
H3A-4DL-DRAIN XPRF DPRES, ALUM 10-200PSID DPDT ENCL DRAIN NEMA3INFO1,666.50833.25
H3A-4DL-MV XPRF DPRES, ALUM 10-200PSID DPDT GOLD CNTCT SWTCHINFO1,605.90802.95
H3A-4DL-VIT XPRF DPRES, ALUM 10-200PSID DPDT FLUOR DIAP ORINGSINFO1,555.40777.70
H3A-4DT XPRF DPRES, ALUM 10-200PSID DPDT TERM BLK UL/CSAINFO1,666.50833.25
H3A-4DT-DRAIN XPRF DPRES, ALUM 10-200PSID DPDT ENCL DRAIN NEMA3INFO1,787.70893.85
H3A-4DT-MV XPRF DPRES, ALUM 10-200PSID DPDT GOLD CNTCT SWTCHINFO1,727.10863.55
H3A-4DT-VIT XPRF DPRES, ALUM 10-200PSID DPDT FLUOR DIAP ORINGSINFO1,676.60838.30
H3A-4SC XPRF DPRES, ALUM, 10-200PSID, SPDT, TERM BLK ATEXINFO1,454.40727.20
H3A-4SC-DRAIN XPRF DPRES, ALUM 10-200PSID SPDT ENCL DRAIN NEMA3INFO1,575.60787.80
H3A-4SC-MV XPRF DPRES, ALUM 10-200PSID SPDT GOLD CNTCT SWTCHINFO1,484.70742.35
H3A-4SC-VIT XPRF DPRES, ALUM 10-200PSID SPDT FLUOR DIAP ORINGSINFO1,464.50732.25
H3A-4SL XPRF DPRES, ALUM, 10-200PSID, SPDT, WIRE LEADSINFO1,454.40727.20
H3A-4SL-DRAIN XPRF DPRES, ALUM 10-200PSID SPDT ENCL DRAIN NEMA3INFO1,575.60787.80
H3A-4SL-MV XPRF DPRES, ALUM 10-200PSID SPDT GOLD CNTCT SWTCHINFO1,484.70742.35
H3A-4SL-VIT XPRF DPRES, ALUM 10-200PSID SPDT FLUOR DIAP ORINGSINFO1,464.50732.25
H3A-4ST XPRF DPRES, ALUM 10-200PSID SPDT TERM BLK UL/CSAINFO1,575.60787.80
H3A-4ST-DRAIN XPRF DPRES, ALUM 10-200PSID SPDT ENCL DRAIN NEMA3INFO1,696.80848.40
H3A-4ST-MV XPRF DPRES, ALUM 10-200PSID SPDT GOLD CNTCT SWTCHINFO1,605.90802.95
H3A-4ST-VIT XPRF DPRES, ALUM 10-200PSID SPDT FLUOR DIAP ORINGSINFO1,585.70792.85
H3S-1DC XPRF DPRES, SS, 10-180IN WC, DPDT, TERM BLK ATEXINFO2,030.101,015.05
H3S-1DC-DRAIN XPRF DPRES, SS, 10-180IN WC DPDT ENCL DRAIN NEMA3INFO2,151.301,075.65
H3S-1DC-MV XPRF DPRES, SS, 10-180IN WC DPDT GOLD CNTCT SWTCHINFO2,090.701,045.35
H3S-1DL XPRF DPRES, SS, 10-180IN WC, DPDT, WIRE LEADSINFO2,030.101,015.05
H3S-1DL-DRAIN XPRF DPRES, SS, 10-180IN WC DPDT ENCL DRAIN NEMA3INFO2,151.301,075.65
H3S-1DL-MV XPRF DPRES, SS, 10-180IN WC DPDT GOLD CNTCT SWTCHINFO2,090.701,045.35
H3S-1DT XPRF DPRES, SS, 10-180IN WC, DPDT, TERM BLK UL/CSAINFO2,151.301,075.65
H3S-1DT-DRAIN XPRF DPRES, SS, 10-180IN WC DPDT ENCL DRAIN NEMA3INFO2,272.501,136.25
H3S-1DT-MV XPRF DPRES, SS, 10-180IN WC DPDT GOLD CNTCT SWTCHINFO2,211.901,105.95
H3S-1SC XPRF DPRES, SS, 10-180IN WC, SPDT, TERM BLK ATEXINFO1,939.20969.60
H3S-1SC-DRAIN XPRF DPRES, SS, 10-180IN WC SPDT ENCL DRAIN NEMA3INFO2,060.401,030.20
H3S-1SC-MV XPRF DPRES, SS, 10-180IN WC SPDT GOLD CNTCT SWTCHINFO1,969.50984.75
H3S-1SL XPRF DPRES, SS, 10-180IN WC, SPDT, WIRE LEADSINFO1,939.20969.60
H3S-1SL-DRAIN XPRF DPRES, SS, 10-180IN WC SPDT ENCL DRAIN NEMA3INFO2,060.401,030.20
H3S-1SL-MV XPRF DPRES, SS, 10-180IN WC SPDT GOLD CNTCT SWTCHINFO1,969.50984.75
H3S-1ST XPRF DPRES, SS, 10-180IN WC, SPDT, TERM BLK UL/CSAIn Stock2,060.401,030.20
H3S-1ST-DRAIN XPRF DPRES, SS, 10-180IN WC SPDT ENCL DRAIN NEMA3INFO2,181.601,090.80
H3S-1ST-MV XPRF DPRES, SS, 10-180IN WC SPDT GOLD CNTCT SWTCHINFO2,090.701,045.35
H3S-2DC XPRF DPRES, SS, 0.5-15PSID, DPDT, TERM BLK ATEXINFO2,030.101,015.05
H3S-2DC-DRAIN XPRF DPRES, SS, 0.5-15PSID DPDT ENCL DRAIN NEMA3INFO2,151.301,075.65
H3S-2DC-MV XPRF DPRES, SS, 0.5-15PSID, DPDT, GOLD CNTCT SWTCHINFO2,090.701,045.35
H3S-2DL XPRF DPRES, SS, 0.5-15PSID, DPDT, WIRE LEADSINFO2,030.101,015.05
H3S-2DL-DRAIN XPRF DPRES, SS, 0.5-15PSID DPDT ENCL DRAIN NEMA3INFO2,151.301,075.65
H3S-2DL-MV XPRF DPRES, SS, 0.5-15PSID, DPDT, GOLD CNTCT SWTCHINFO2,090.701,045.35
H3S-2DT XPRF DPRES, SS, 0.5-15PSID, DPDT, TERM BLK UL/CSAINFO2,151.301,075.65
H3S-2DT-DRAIN XPRF DPRES, SS, 0.5-15PSID DPDT ENCL DRAIN NEMA3INFO2,272.501,136.25
H3S-2DT-MV XPRF DPRES, SS, 0.5-15PSID, DPDT, GOLD CNTCT SWTCHINFO2,211.901,105.95
H3S-2SC XPRF DPRES, SS, 0.5-15PSID, SPDT, TERM BLK ATEXINFO1,939.20969.60
H3S-2SC-DRAIN XPRF DPRES, SS, 0.5-15PSID SPDT ENCL DRAIN NEMA3INFO2,060.401,030.20
H3S-2SC-MV XPRF DPRES, SS, 0.5-15PSID, SPDT, GOLD CNTCT SWTCHINFO1,969.50984.75
H3S-2SL XPRF DPRES, SS, 0.5-15PSID, SPDT, WIRE LEADSINFO1,939.20969.60
H3S-2SL-DRAIN XPRF DPRES, SS, 0.5-15PSID SPDT ENCL DRAIN NEMA3INFO2,060.401,030.20
H3S-2SL-MV XPRF DPRES, SS, 0.5-15PSID, SPDT, GOLD CNTCT SWTCHINFO1,969.50984.75
H3S-2ST XPRF DPRES, SS, 0.5-15PSID, SPDT, TERM BLK UL/CSAINFO2,060.401,030.20
H3S-2ST-DRAIN XPRF DPRES, SS, 0.5-15PSID SPDT ENCL DRAIN NEMA3INFO2,181.601,090.80
H3S-2ST-MV XPRF DPRES, SS, 0.5-15PSID, SPDT, GOLD CNTCT SWTCHINFO2,090.701,045.35
H3S-3DC XPRF DPRES, SS, 5-70PSID, DPDT, TERM BLK ATEXINFO2,030.101,015.05
H3S-3DC-DRAIN XPRF DPRES, SS, 5-70PSID, DPDT, ENCL W/DRAIN NEMA3INFO2,151.301,075.65
H3S-3DC-MV XPRF DPRES, SS, 5-70PSID, DPDT, GOLD CNTCT SWTCHINFO2,090.701,045.35
H3S-3DL XPRF DPRES, SS, 5-70PSID, DPDT, WIRE LEADSINFO2,030.101,015.05
H3S-3DL-DRAIN XPRF DPRES, SS, 5-70PSID, DPDT, ENCL W/DRAIN NEMA3INFO2,151.301,075.65
H3S-3DL-MV XPRF DPRES, SS, 5-70PSID, DPDT, GOLD CNTCT SWTCHINFO2,090.701,045.35
H3S-3DT XPRF DPRES, SS, 5-70PSID, DPDT, TERM BLK UL/CSAINFO2,151.301,075.65
H3S-3DT-DRAIN XPRF DPRES, SS, 5-70PSID, DPDT, ENCL W/DRAIN NEMA3INFO2,272.501,136.25
H3S-3DT-MV XPRF DPRES, SS, 5-70PSID, DPDT, GOLD CNTCT SWTCHINFO2,211.901,105.95
H3S-3SC XPRF DPRES, SS, 5-70PSID, SPDT, TERM BLK ATEXINFO1,939.20969.60
H3S-3SC-DRAIN XPRF DPRES, SS, 5-70PSID, SPDT, ENCL W/DRAIN NEMA3INFO2,060.401,030.20
H3S-3SC-MV XPRF DPRES, SS, 5-70PSID, SPDT, GOLD CNTCT SWTCHINFO1,969.50984.75
H3S-3SL XPRF DPRES, SS, 5-70PSID, SPDT, WIRE LEADSINFO1,939.20969.60
H3S-3SL-DRAIN XPRF DPRES, SS, 5-70PSID, SPDT, ENCL W/DRAIN NEMA3INFO2,060.401,030.20
H3S-3SL-MV XPRF DPRES, SS, 5-70PSID, SPDT, GOLD CNTCT SWTCHINFO1,969.50984.75
H3S-3ST XPRF DPRES, SS, 5-70PSID, SPDT, TERM BLK UL/CSAINFO2,060.401,030.20
H3S-3ST-DRAIN XPRF DPRES, SS, 5-70PSID, SPDT, ENCL W/DRAIN NEMA3INFO2,181.601,090.80
H3S-3ST-MV XPRF DPRES, SS, 5-70PSID, SPDT, GOLD CNTCT SWTCHINFO2,090.701,045.35
H3S-4DC XPRF DPRES, SS, 10-200PSID, DPDT, TERM BLK ATEXINFO2,030.101,015.05
H3S-4DC-DRAIN XPRF DPRES, SS, 10-200PSID DPDT ENCL DRAIN NEMA3INFO2,151.301,075.65
H3S-4DC-MV XPRF DPRES, SS, 10-200PSID, DPDT, GOLD CNTCT SWTCHINFO2,090.701,045.35
H3S-4DL XPRF DPRES, SS, 10-200PSID, DPDT, WIRE LEADSINFO2,030.101,015.05
H3S-4DL-DRAIN XPRF DPRES, SS, 10-200PSID DPDT ENCL DRAIN NEMA3INFO2,151.301,075.65
H3S-4DL-MV XPRF DPRES, SS, 10-200PSID, DPDT, GOLD CNTCT SWTCHINFO2,090.701,045.35
H3S-4DT XPRF DPRES, SS, 10-200PSID, DPDT, TERM BLK UL/CSAINFO2,151.301,075.65
H3S-4DT-DRAIN XPRF DPRES, SS, 10-200PSID DPDT ENCL DRAIN NEMA3INFO2,272.501,136.25
H3S-4DT-MV XPRF DPRES, SS, 10-200PSID, DPDT, GOLD CNTCT SWTCHINFO2,211.901,105.95
H3S-4SC XPRF DPRES, SS, 10-200PSID, SPDT, TERM BLK ATEXINFO1,939.20969.60
H3S-4SC-DRAIN XPRF DPRES, SS, 10-200PSID SPDT ENCL DRAIN NEMA3INFO2,060.401,030.20
H3S-4SC-MV XPRF DPRES, SS, 10-200PSID, SPDT, GOLD CNTCT SWTCHINFO1,969.50984.75
H3S-4SL XPRF DPRES, SS, 10-200PSID, SPDT, WIRE LEADSINFO1,939.20969.60
H3S-4SL-DRAIN XPRF DPRES, SS, 10-200PSID SPDT ENCL DRAIN NEMA3INFO2,060.401,030.20
H3S-4SL-MV XPRF DPRES, SS, 10-200PSID, SPDT, GOLD CNTCT SWTCHINFO1,969.50984.75
H3S-4ST XPRF DPRES, SS, 10-200PSID, SPDT, TERM BLK UL/CSAINFO2,060.401,030.20
H3S-4ST-DRAIN XPRF DPRES, SS, 10-200PSID SPDT ENCL DRAIN NEMA3INFO2,181.601,090.80
H3S-4ST-MV XPRF DPRES, SS, 10-200PSID, SPDT, GOLD CNTCT SWTCHINFO2,090.701,045.35

Accessories

No accessories found
Features
  • One or two single pole
  • Set-points up to 200 psid
  • Suitable for hazardous locations
  • Weatherproof housings
Specifications

Wetted Materials :See pressure chamber and diaphragm material in model chart

Temperature Limit :-4 to 220℉ (-20 to 104℃), ATEX: -20 to 90℃ (-4 to 194℉)

Pressure Limit :1500 psig (103 bar)

Enclosure Rating :See ratings chart

Switch Type :SPDT or DPDT snap switch

Electrical Rating :5A @ 125/250 VAC (V~), 30 VDC (V ). MV option: 1A @ 125 VAC (V~); 1A res., .5A ind. @ 30 VDC (V )

Electrical Connections :See model chart

Conduit Connection :3/4″ female NPT

Process Connection :1/8″ female NPT

Mounting Orientation :Vertical

Set Point Adjustment :Internal screw

Weight :4 lb, 2 oz (2 kg)

Deadband :Approximately 5% of range

Certifications