Pressure Switch DG 500HT
- For monitoring positive air and gas pressures, negative or differential air pressures
- Adjusting Range: 40 - 200 ″WC (100 - 500 mbar)
- Locks off with Rising Pressure
- Accurate, repeatable switching action with low hysteresis
- Choice of mounting positions
- One normally open and one normally closed contact in each switch
- Automatic and manual reset models available
- Compact construction, easy installation
- Special models available for oxygen service and low voltage operation
- FM and UL approved
Learn More:
Documentation Accessories Applications Specifications
Price:
Accessories
| Model and Description | Price | Cart |
| DG/DL ACC 03 Pilot lamp set 110/120 V AC red |
Contact Us | Not available for online purchase. |
| DG/DL ACC 04 Pilot lamp set 110/120 V AC blue |
Contact Us | Not available for online purchase. |
| DG/DL ACC 05 LED set 24 V DC/AC red/green |
Contact Us | Not available for online purchase. |
| DG ACC 06 Connecting set DG..U, DG..T |
Contact Us | Not available for online purchase. |
| DG/DL ACC 08 U-angle bracket DG, DL |
Contact Us | Not available for online purchase. |
| DG/DL ACC 09 Replacement pressure switch cover (standard, no reset) |
Contact Us | Not available for online purchase. |
Applications
 |
For the control of the minimum gas inlet pressure. |
 |
Negative pressure cut-out for gas (and air) and for low voltages with close position indicator. |
 |
Electrical safety shut-off valve (SAV) with closed position indication of devices connected downstream. |
 |
Differential pressure switch for monitoring of air filters. |
Specifications
| Electrical | |
| Supply voltage: | 30 - 240 Vac; 50/60 Hz (Special "G" models available for voltages below 30 Vac) |
| Switch contact rating: | 5 A resistive
or 0.5 A inductive (cos φ = 0.6) For "G" models, 0.1 A resistive or 0.05 A inductive (cos φ = 0.6) |
| Short-circuit protection: | use 8 A quick-acting fuse |
| Screw terminals: | Maximum wire gauge of 14 - 18 AWG wire |
| pressure switches | |
| ½″ NPT conduit connection. ¼″ NPT female connections (2) for pressure (high differential) side of switch. ⅛″ NPT female connection for suction (low differential) side of switch. 11/32″ (9 mm) diameter test hose fitting on pressure (high differential) side of switch. |
|
| Adjusting Range | |
| DG 6T: | 0.2 - 2.4 ″WC (0.6 - 6 mbar) |
| DG 10T: | 0.4 - 4 ″WC (1 - 10 mbar) |
| DG 50T: | 1 - 20 ″WC (2.5 - 50 mbar) |
| DG 150T: | 12 - 60 ″WC (30 - 150 mbar) |
| DG 500T: | 40 - 200 ″WC (100 - 500 mbar) |
| DG 10HT and DG 10NT: | 0.4 - 4 ″WC (1 - 10 mbar) |
| DG 50HT and DG 50NT: | 1 - 20 ″WC (2.5 - 50 mbar) |
| DG 150HT and DG 150NT: | 12 - 60 ″WC (30 - 150 mbar) |
| DG 500HT and DG 500NT: | 40 - 200 ″WC (100 - 500 mbar) |
| Hysteresis, max | |
| DG 6T: | 0.12 ″WC (0.3 mbar) |
| DG 10T: | 0.16 ″WC (0.4 mbar) |
| DG 50T: | 0.60 ″WC (1.5 mbar) |
| DG 150T: | 1.60 ″WC (4.0 mbar) |
| DG 500T: | 4.00 ″WC (10.0 mbar) |
| Differential between switching pressure and reset | |
| DG 10HT and DG 10NT: | 0.2 - 0.4 ″WC (0.4 - 1 mbar) |
| DG 50HT and DG 50NT: | 0.2 - 0.8 ″WC (0.4 - 2 mbar) |
| DG 150HT and DG 150NT: | 0.2 - 1.6 ″WC (0.4 - 4 mbar) |
| DG 500HT and DG 500NT: | 1.6 - 4.0 ″WC (4.0 - 10 mbar) |
| Operating limits | |
| Ambient and gas temperature range: |
-40° F to 140° F (-40° C to 60° C) |
| Maximum storage temperature: | 158° F (70° C) |
| Maximum surge pressure: | 30 psig (2 bar) for a duration < 15 minutes |
| Dimensions and Weights | |
| Weight: | DG 6 to DG 50 models: 0.6 lbs (0.3kg) DG 150 and DG 500 models: 0.7 lbs (0.33kg) |
| Dimensions: | 3 inches × 3 inches × 2.76 inches |
| Construction Materials | |
| FMDG pressure switch covers: | High quality injection-molded plastic. |
| Switch housings: | Glass fiber-reinforced plastic and pressure die-cast aluminum alloy. |
| Diaphragms: | Nitrile rubber |
| Enclosure: | NEMA 3 (IP 54) |
