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 Explosion-proof, UL & CSA Listed for Class I, Groups B, C & D and Class II, Groups E, F & G. The H2 is designed for sequencing two different actions as pressure of a liquid or gas increases or decreases. The patented 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. Dimensional Information
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Wetted Materials: Aluminum chamber with Mylar diaphragm and Buna-N O-ring standard. Brass chamber or 316SS chamber optional. Teflon® diaphragm optional. Viton® or EPDM O-ring optional.
Temperature Limit: 275°F (135°C).
Pressure Limit: 1500 psig (103 bar).
Enclosure Rating: UL listed explosion-proof, Class I, Groups B, C, and D. Class II, Groups E, F, and G. Weatherproof, NEMA 4. CSA optional.
Switch Type: Two SPDT snap switches.
Electrical Rating: 5A @ 125/250VAC, 5A res., 3A ind. @ 30VDC. Gold contacts or 10A switch optional.
Electrical Connections: 18 AWG, 18" (460 mm) long.
Conduit Connection: 3/4" female NPT.
Process Connection: 1/4" female NPT.
Mounting Orientation: Any position.
Set Point Adjustment: Internal nut.
Weight: 2 lb (.9 kg).
Deadband: Approximately 10% of range.
Agency Approvals: CE, UL, CSA.
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