Dwyer Instruments A3002 Pressure Switch/Gage
The Dwyer Instruments A3002 Pressure Switch/Gage is a high-precision, 3-in-1 instrument designed for the simultaneous measurement and dual-limit control of differential pressure, positive pressure, or negative pressure. Engineered with the field-proven Magnehelic gage movement, the A3002 provides a 0-2.0" w.c. range with ±2% full-scale accuracy. This Photohelic pressure switch utilizes phototransistor-actuated DPDT relays, ensuring chatter-free operation and high repeatability in critical HVACR applications. The 4-inch dial face features easily adjustable front-mounted setpoint knobs, allowing technicians to define high and low limits with a deadband of less than 1%. Designed for air and non-combustible gases, the unit includes 1/8" FNPT connections and a clear polycarbonate cover to protect the optical limit switches. Whether you are managing clean room environments, fume exhaust systems, or differential pressure control in air handlers, the A3002 delivers industrial-grade reliability without the complexity of separate gauges and switches.
Key Benefits- Versatile 3-in-1 Design: Combines a continuous-reading pressure gauge with two independent DPDT relay switches to reduce installation time and hardware costs.
- Optical Switching Technology: Employs phototransistor-actuated limit switches and a helix-driven light shutter to eliminate mechanical wear and ensure precise setpoint accuracy.
- Continuous Monitoring: The pressure gauge remains fully functional and provides accurate readings even during a total loss of electrical power to the switching circuit.
- High Current Rating: Features dual Form C relays rated for 10A at 120/240 VAC, making it compatible with a wide range of fan, damper, and alarm start-stop circuits.
- Rugged Construction: Built with a self-extinguishing polycarbonate terminal board and glass epoxy circuit boards for long-term performance in demanding mechanical rooms.
Can I use the A3002 for liquid pressure applications?
No, this model is specifically designed for air and non-combustible, compatible gases. For liquid media, a different Series of Dwyer differential pressure switches would be required.
Does the unit require a specific mounting orientation?
Yes, the A3002 is factory calibrated for a vertical diaphragm position. Mounting it at other angles may affect the zero balance and overall accuracy of the 0-2.0" w.c. scale.
How do I adjust the high and low setpoints?
The setpoints are adjusted via the external knobs located on the front of the dial. These allow you to instantly change the low-limit and hi-limit control points without opening the enclosure.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Dwyer Instruments A3002 Pressure Switch/Gage
The Dwyer Instruments A3002 Pressure Switch/Gage is a high-precision, 3-in-1 instrument designed for the simultaneous measurement and dual-limit control of differential pressure, positive pressure, or negative pressure. Engineered with the field-proven Magnehelic gage movement, the A3002 provides a 0-2.0" w.c. range with ±2% full-scale accuracy. This Photohelic pressure switch utilizes phototransistor-actuated DPDT relays, ensuring chatter-free operation and high repeatability in critical HVACR applications. The 4-inch dial face features easily adjustable front-mounted setpoint knobs, allowing technicians to define high and low limits with a deadband of less than 1%. Designed for air and non-combustible gases, the unit includes 1/8" FNPT connections and a clear polycarbonate cover to protect the optical limit switches. Whether you are managing clean room environments, fume exhaust systems, or differential pressure control in air handlers, the A3002 delivers industrial-grade reliability without the complexity of separate gauges and switches.
Key Benefits- Versatile 3-in-1 Design: Combines a continuous-reading pressure gauge with two independent DPDT relay switches to reduce installation time and hardware costs.
- Optical Switching Technology: Employs phototransistor-actuated limit switches and a helix-driven light shutter to eliminate mechanical wear and ensure precise setpoint accuracy.
- Continuous Monitoring: The pressure gauge remains fully functional and provides accurate readings even during a total loss of electrical power to the switching circuit.
- High Current Rating: Features dual Form C relays rated for 10A at 120/240 VAC, making it compatible with a wide range of fan, damper, and alarm start-stop circuits.
- Rugged Construction: Built with a self-extinguishing polycarbonate terminal board and glass epoxy circuit boards for long-term performance in demanding mechanical rooms.
Can I use the A3002 for liquid pressure applications?
No, this model is specifically designed for air and non-combustible, compatible gases. For liquid media, a different Series of Dwyer differential pressure switches would be required.
Does the unit require a specific mounting orientation?
Yes, the A3002 is factory calibrated for a vertical diaphragm position. Mounting it at other angles may affect the zero balance and overall accuracy of the 0-2.0" w.c. scale.
How do I adjust the high and low setpoints?
The setpoints are adjusted via the external knobs located on the front of the dial. These allow you to instantly change the low-limit and hi-limit control points without opening the enclosure.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Dwyer Instruments A3002 Pressure Switch/Gage is a high-precision, 3-in-1 instrument designed for the simultaneous measurement and dual-limit control of differential pressure, positive pressure, or negative pressure. Engineered with the field-proven Magnehelic gage movement, the A3002 provides a 0-2.0" w.c. range with ±2% full-scale accuracy. This Photohelic pressure switch utilizes phototransistor-actuated DPDT relays, ensuring chatter-free operation and high repeatability in critical HVACR applications. The 4-inch dial face features easily adjustable front-mounted setpoint knobs, allowing technicians to define high and low limits with a deadband of less than 1%. Designed for air and non-combustible gases, the unit includes 1/8" FNPT connections and a clear polycarbonate cover to protect the optical limit switches. Whether you are managing clean room environments, fume exhaust systems, or differential pressure control in air handlers, the A3002 delivers industrial-grade reliability without the complexity of separate gauges and switches.
Key Benefits- Versatile 3-in-1 Design: Combines a continuous-reading pressure gauge with two independent DPDT relay switches to reduce installation time and hardware costs.
- Optical Switching Technology: Employs phototransistor-actuated limit switches and a helix-driven light shutter to eliminate mechanical wear and ensure precise setpoint accuracy.
- Continuous Monitoring: The pressure gauge remains fully functional and provides accurate readings even during a total loss of electrical power to the switching circuit.
- High Current Rating: Features dual Form C relays rated for 10A at 120/240 VAC, making it compatible with a wide range of fan, damper, and alarm start-stop circuits.
- Rugged Construction: Built with a self-extinguishing polycarbonate terminal board and glass epoxy circuit boards for long-term performance in demanding mechanical rooms.
Can I use the A3002 for liquid pressure applications?
No, this model is specifically designed for air and non-combustible, compatible gases. For liquid media, a different Series of Dwyer differential pressure switches would be required.
Does the unit require a specific mounting orientation?
Yes, the A3002 is factory calibrated for a vertical diaphragm position. Mounting it at other angles may affect the zero balance and overall accuracy of the 0-2.0" w.c. scale.
How do I adjust the high and low setpoints?
The setpoints are adjusted via the external knobs located on the front of the dial. These allow you to instantly change the low-limit and hi-limit control points without opening the enclosure.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
