Dwyer Instruments Series H2 Part Numbering Designation
Series H2 | Dual-Action Explosion-Proof Pressure Switches have a design that is weatherproof and can be mounted in any position and i
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Mechanical HVAC or process equipment Chemical, petroleum, food and drug processing industries
Process and Industrial applications
Explosion-Proof, UL & CSA Listed for Class I, Groups B, C & D and Class II, Groups E, F & G.
The Series H2 Dual-Action Explosion-Proof Pressure Switch is designed for sequencing two
different actions as pressure of a liquid or gas increases or decreases. The design consists of
two concentric pistons operated by a single diaphragm with one pressure chamber. Each piston
actuates a separate switch independent of the other. The switches may be adjusted to operate
together, at opposite ends of the range or at two intermediate set points. The threaded top is
removed to field adjust or service switches without disturbing electrical or pressure connections.
The Duotect® switch is explosion-proof and weatherproof. It can be mounted in any position and
is not affected by vibration.
Product Applications
Model Chart
EXAMPLE H2 S 1 CSA Series H2S-1-CSA Dual-Action Explosion-Proof Pressure Switch,stainless steelhousing, low range 3-40 psi, high range 5-75 psi, with CSA approval.
SERIES H2 Dual-Action Explosion-Proof Pressure Switch
HOUSING S Stainless Steel
RANGE 1
1S
2
2S
3
3S
Low Range 3-40 psi, High Range 5-75 psi
3-75 psi
Low Range 25-250 psi, High Range 30-400 psi
25-400 psi
Low Range 100-1000 psi, High Range 150-1500 psi
100-1500 psi
OPTIONS CSA
MV
PRESET
ST
EPDM
CSA Approval
Gold Contact Switch
Preset
Stainless Steel Tag
Ethylene Propylene O-rings
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Series H2 Dual-Action Explosion-proof Pressure
Switches
Explosion-proof and Weatherproof Enclosure
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