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COLUMBUS ELECTRIC Adjustable Set-Point Air Pressure Switch - Adjustable Set-Point Air Pressure Switches
COLUMBUS ELECTRICAdjustable Set-Point Air Pressure Switches

COLUMBUS ELECTRIC Adjustable Set-Point Air Pressure Switch

The COLUMBUS ELECTRIC Air Sensing Switch: Adj (MPN GRH3AD) is an adjustable set-point air pressure switch with auto reset, covering a range of 0.05 in wc to 12 in wc. It features a SPDT switch rated at 24V AC, housed…

SKU 3G-OTH-68777

Brand
COLUMBUS ELECTRIC
Item
Adjustable Set-Point Air Pressure Switch
Part Number
GRH3AD
Category
Adjustable Set-Point Air Pressure Switches
Available to Order
Also known as:GRH3ADCOLUMBUS ELECTRIC
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Technical Specifications

COLUMBUS ELECTRIC
Manufacturer Part Number
GRH3AD
Type
Auto Reset, 0.05 in wc to 12 in wc, Conduit Box, SPDT, Integral Compression
Switch Voltage
24V AC

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COLUMBUS ELECTRIC Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The COLUMBUS ELECTRIC Air Sensing Switch: Adj (MPN GRH3AD) is an adjustable set-point air pressure switch with auto reset, covering a range of 0.05 in wc to 12 in wc. It features a SPDT switch rated at 24V AC, housed in a conduit box with integral compression. This product is designed for sensing air pressure changes in industrial equipment.

Frequently Asked Questions

What is the COLUMBUS ELECTRIC GRH3AD air sensing switch used for?

The COLUMBUS ELECTRIC GRH3AD is an adjustable set-point air pressure switch used to sense air pressure changes in industrial equipment. It is commonly applied in HVAC systems, air-handling units, and process control to monitor or control airflow and pressure differentials.

What are the specifications of the COLUMBUS ELECTRIC GRH3AD?

The GRH3AD is an auto-reset switch with an adjustable set-point range of 0.05 in wc to 12 in wc. It features a SPDT contact rated at 24V AC, housed in a conduit box with integral compression. The manufacturer part number is GRH3AD from COLUMBUS ELECTRIC.

Where to buy the COLUMBUS ELECTRIC GRH3AD worldwide?

3G Electric supplies the COLUMBUS ELECTRIC GRH3AD worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time.

How to install the COLUMBUS ELECTRIC GRH3AD air sensing switch?

Mount the GRH3AD in a dry location using the conduit box. Connect the SPDT contacts to your 24V AC control circuit. Adjust the set-point screw to the desired pressure differential within the 0.05 in wc to 12 in wc range. Ensure the sensing port is clean and free of debris.

Used in

Common applications for COLUMBUS ELECTRIC
Commercial HVAC — Columbus Electric Line Voltage Analog Thermostat (9502DS2T-P) for zone temperature control in office buildings.
Industrial heating — Columbus Electric Hazardous Location Line Volt Mechanical Tstat (HLT-1) for temperature regulation in paint booths or chemical storage areas.
Residential ventilation — Columbus Electric Attic Fan Thermostat (2E340) to activate attic exhaust fans in warm climates.
Gas heating systems — Columbus Electric Gas Wall and Ceiling Heater Thermostat (P322016) for space heating in warehouses or workshops.
Portable cooling equipment — Columbus Electric Portable Cooling Thermostat (KTO-121B) for temperature control in temporary cooling units.
HVAC air handling — Columbus Electric Adjustable Set-Point Air Pressure Switch (GRH3AD) for filter monitoring or fan proving in duct systems.
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COLUMBUS ELECTRIC Products

3G Electric supplies COLUMBUS ELECTRIC adjustable set-point air pressure switches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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