Explosion-Proof Differential Pressure Switches- Series H3
Compact, low cost, and weatherproof. Setpoints from 10" w.c. to 200 PSID – rated 1500 PSI.
Unique Patented Design assures exceptional sensitivity to pressures down to 10 in. w.c. even at rated pressures up to 1500 psig (103 bar). Direct action of range spring on diaphragm plate minimizes friction while providing great repeatability. Housing is NEMA 4, IP 56 with hazardous location ratings of Cl I, Groups B, C & D; Cl II, Groups E, F & G or CENELEC EExd IIC T6.
PHYSICAL DATA
| Maximum Temperature: | 220°F (104.4°C) |
|---|---|
| Maximum Pressure: | 1500 psig (103 bar) |
| Pressure Connection: | 1/8" NPT female |
| Wiring Connections: | 18 AWG x 18" (45.7 cm) leads. Internal terminal blocks optional. |
| Conduit Connection: | 3/4" NPT |
| Electrical Ratings: | SPDT or optional DPDT contacts rated 5A @ 125/250 VAC, 5A @ 30 VDC. MV (gold contacts) option for dry circuits rated 1A @ 125 VAC, 1A resistive or 0.5A inductive @ 30 VDC. |
| Set Point Adjustment: | Screw type, field adjustable over entire operating range. |
| Housing: | Aluminum |
| Body: | Aluminum or 316 stainless steel |
| Diaphragm: | Nitrile or Viton |
| Weight: | 4 lbs., 2 oz. (1.87 kg) |
FACTORY STOCKED MODELS
| Model No. | Body | Diaphragm | Range |
|---|---|---|---|
| H3A-1 SL H3A-2SL H3A-3SL H3A-4SL H3S-1 SL H3S-2SL H3S-3SL H3S-4SL |
Aluminum Aluminum Aluminum Aluminum 316 SS 316 SS 316 SS 316 SS |
Nitrile Nitrile Nitrile Nitrile Viton Viton Viton Viton |
10-180 in. w.c. 0.5-15 psid 5-70 psid 10-200 psid 10-180 in. w.c. 0.5-15 psid 5-70 psid 10-200 psid |