Patent No. 4,827,095

NOTE: Shown without housing and cover.

POPULAR MODELS

Model Number	Description	Price
H3A-1SL	Differential pressure switch, aluminum pressure chamber, Nitrile diaphragm, adjustable range 10-180" w.c. (2.48-44.78 kPa), SPDT snap switch rated 5A @ 125/250 VAC, 30 VDC, 18 AWG x 18" lead wires.	£ 362.00
H3A-2SL	Differential pressure switch, aluminum pressure chamber, Nitrile diaphragm, adjustable range 0.5-15 psid (0.03-1 bar), SPDT snap switch rated 5A @ 125/250 VAC, 30 VDC, 18 AWG x 18" lead wires.	£ 362.00
H3A-3SL	Differential pressure switch, aluminum pressure chamber, Nitrile diaphragm, adjustable range 5-70 psid (.34-4.8 bar), SPDT snap switch rated 5A @ 125/250 VAC, 30 VDC, 18 AWG x 18" lead wires.	£ 362.00
H3S-1SL	Differential pressure switch, 316SS pressure chamber, fluoroelastomer diaphragm, adjustable range 10-180" w.c. (2.48-44.78 kPa), SPDT snap switch rated 5A @ 125/250 VAC, 30 VDC, 18 AWG x 18" lead wires.	£ 484.00
H3S-2SL	Differential pressure switch, 316SS pressure chamber, fluoroelastomer diaphragm, adjustable range 0.5-15 psid (0.03-1 bar), SPDT snap switch rated 5A @ 125/250 VAC, 30 VDC, 18 AWG x 18" lead wires.	£ 484.00
H3S-3SL	Differential pressure switch, 316SS pressure chamber, fluoroelastomer diaphragm, adjustable range 5-70 psid (.34-4.8 bar), SPDT snap switch rated 5A @ 125/250 VAC, 30 VDC, 18 AWG x 18" lead wires.	£ 484.00

*Prices quoted exclude carriage and VAT which will be added where appropriate in accordance with legislation in force at the date of supply. E&OE. Orders are accepted subject to Dwyer Instruments Ltd Standard Terms and Conditions of Sales and none others whatsoever.

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NOTE: ATEX Certified is an additional charge -- consult factory for pricing.

ACCESSORIES

Model Number	Description	Price
A-610	Pipe mounting kit for 1-1/4" to 2" pipe.	£ 18.10

*Prices quoted exclude carriage and VAT which will be added where appropriate in accordance with legislation in force at the date of supply. E&OE. Orders are accepted subject to Dwyer Instruments Ltd Standard Terms and Conditions of Sales and none others whatsoever.

Click the Model Number of the item to add the item to your shopping cart.

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Model Chart

Example	H3	S	2	S	C	MV	H3S-2SC-MV Differential Pressure Control; 316SS pressure chamber and Fluoroelastomer diaphragm, weatherproof and ATEX, SPDT snap action switch with gold contacts; fixed deadband; automatic reset; adjustable range 0.5-15 psid.
Construction	H3						Series designator, weatherproof and explosion-proof
Pressure Chamber & Diaphragm Material (Wetted)		A S					Aluminum chamber with Nitrile diaphragm 316SS chamber with Fluoroelastomer diaphragm
Adjustable Operating Range			1 2 3 4				Adjustable range 10-180" w.c. (2.48-44.78 kPa) Adjustable range 0.5-15 psid (0.03-1 bar) Adjustable range 5-70 psid (.34-4.8 bar) Adjustable range 10-200 psid (.7-13.8 bar)
Circuit (Switch) Options				S D			SPDT snap action switch rated 5A @ 125/250VAC, 30 VDC DPDT snap action switch rated 5A @ 125/250VAC, 30 VDC
Electrical Connection					L T C		18 AWG x 18 inch lead wires UL, CSA approved internal terminal block ATEX approved internal terminal block
Options						DRAIN MV VIT	Housing with drain - allows condensate to be drained from inside enclosure (meets NEMA 3 instead of 4X) Gold contacts on snap switch for dry circuits rated 1A @ 125VAC, 1A resistive or 0.5A inductive @ 30VDC Fluoroelastomer diaphragm option where not standard