LED Lamp Indicators for QPx32 Series Pressure Switches, please see link below:

Siemens Lamp Indicator for QPx32 Series Pressure Switches

Pressure Switches for Gas and Air

QPx series gas pressure switches detect high or low gas pressure
conditions when used with natural gas, propane, butane, hydrogen,
biogas, or air.

• Maximum operating pressure of 15 psig (1 bar) for all models when vented.
• Ventless operation to 7 psig (500 mbar)
• cULus and FM approved for natural gas, propane, butane, or air
• Plastic used in switch body carries UL V0 flammability rating
• Compatible with hydrogen or hydrogen and natural gas mixtures
• Automatic reset and manual reset models available
• NEMA 4 rating for outdoor applications
• Temperature rating -40F to 140F (-40C to 60C)
• Mounts 1/2 flexible conduit fittings without adapters
• Built-in side test connection for manometer / pressure gauge
• Extra low pressure ranges 0.2 -2, and 0.8 4.

Resources

• QP Series Pressure Switch Technical Literature
• QP Series Pressure Switch Cross Reference Chart