Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
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

<p>The COLUMBUS ELECTRIC GRH3AD is an adjustable set-point air pressure switch designed for precise monitoring and control in HVAC and industrial applications. With an auto reset function and a wide adjustment range…

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
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

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

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

<p>The COLUMBUS ELECTRIC GRH3AD is an adjustable set-point air pressure switch designed for precise monitoring and control in HVAC and industrial applications. With an auto reset function and a wide adjustment range of 0.05 to 12 inches of water column, it offers flexibility for various pressure thresholds. This SPDT switch operates on 24V AC and comes in a robust conduit box with integral compression fittings, ensuring reliable performance in demanding environments.</p><p>Ideal for building automation, cleanrooms, and process control, this switch is a dependable choice for procurement professionals. As a Singapore-based supplier, 3G Electric provides competitive SGD quotes on request, handles GST for local buyers, and offers fast delivery across Singapore and Southeast Asia, with worldwide shipping available.</p>

Frequently Asked Questions

What is the adjustable range and reset type of the GRH3AD?

The GRH3AD has an adjustable set-point range of 0.05 to 12 inches of water column (in wc) and features auto reset, meaning it automatically resets after the pressure returns to the set point.

What are the electrical specifications and enclosure type?

The switch is SPDT (single-pole double-throw) and rated for 24V AC. It comes in a conduit box with integral compression fittings, suitable for wiring in industrial environments.

Used in

Common applications for COLUMBUS ELECTRIC
Industrial burner control — Columbus Electric hazardous-location thermostats (HLT-1) for temperature regulation in explosive environments
HVAC system pressure monitoring — Columbus Electric adjustable air pressure switches (GRH3AD) for duct static pressure sensing
Gas wall heater temperature regulation — Columbus Electric gas heater thermostat (P322016) for 50° to 90°F control in residential heating
Attic ventilation management — Columbus Electric attic fan thermostat (1A22-7) for cool-only operation from 80° to 130°F
Portable cooling equipment — Columbus Electric nonprogrammable thermostat (KTO-121B) for SPST close-on-rise switching in temporary cooling units
Commercial building line-voltage control — Columbus Electric analog thermostat (9502DS2T-P) for 24 to 277V AC heating or cooling in plastic/steel enclosures
Not sure this is the right part? Photo-identify it

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

More from COLUMBUS ELECTRIC

View all COLUMBUS ELECTRIC parts

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first