DG 6T-21N

$124.00 / EA
  • Switch Type: Automatic - Switches With Falling & Rising Pressure
  • WC: 0.2-2.4
  • mbar: 0.5-6
  • NPT Connections (1/4"): 1
  • Pilot Lamp/LED: Blue 120 V
Pressure Switch for gas

The gas pressure switch DG monitors extremely low pressure differentials and triggers switch-on, switch-off or switch-over operations if a set switching point is reached. The switching point can be adjusted using a hand wheel.

It monitors positive and negative gas pressures on various industrial gas and air appliances, such as boiler fan monitoring and differential pressure monitoring in firing, ventilation and air-conditioning systems.

Pressure switches with manual reset lock off after switching. Pressure switches (DG..T) with UL, FM approval are fitted with a nozzle to limit the flow rate (Vent limiter).

  • Certifications & Ratings
  • Product Type Code


  • FM
  • UL
  • cUL


  • Ambient temperature: -40°F to 140°F (-40°C to 60°C)
  • Enclosure: IP 65
  • NEMA 4
  • Hydrogen ready
DG Pressure Switch for Gas
6 Adjusting range 0.2–2.4 “WC (0.5-6 mbar)
10 Adjusting range 0.4–4 “WC (1-10 mbar)
50 Adjusting range 1–20 “WC (2.5-50 mbar)
150 Adjusting range 12–60 “WC (30-150 mbar)
500 Adjusting range 40–200 “WC (100-500 mbar)
Switch Type
H Switches and locks off with rising pressure
N Switches and locks off with falling pressure
F Switches with falling positive pressure
S Switches with rising and falling positive pressure;
for O2, NH3 and air; without approval
T T-product
Contact Type
G Gold-plated contacts
Connection Type
-2 Electrical connection via screw terminals, 1/2" NPT Conduit, NEMA 4 (IP 65)
-4 Electrical connection via screw terminals, cable gland, NEMA 4 (IP 65)
-9 Electrical connection via 4-pin plug, with socket, NEMA 4 (IP 65)
NPT connection
1 NPT connection 1x 1/4"
2 NPT connection 2x 1/4"
Indicator Light
N Blue pilot lamp for 120 V AC
T2 Red/green pilot LED for 110 to 230 V AC
K2 Red/green pilot LED for 24 V DC/AC