Series A3000 Photohelic Pressure Switch-Gage

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Series A3000 Photohelic Pressure Switch-Gage Specification

Display
Analog and setpoint LEDs

Outer Size
4-1/8 inch (104.8 mm) diameter front flange

Grade
Industrial

Bourdon Tube
Not applicable (uses diaphragm sensor)

Thread
1/8 female NPT high and low pressure connections

Sensor Type
Photohelic differential pressure switch-gage

Seal Material
Silicone

Material
Case: Die-cast aluminum; Window: polycarbonate; Internals: stainless steel, silicone, aluminum

Dial Material
Plastic, printed

Pointer Material
Plastic

Processing Type
Machined, molded

Diameter
104.8 mm (4-1/8 inch)

Glass Size
Full front polycarbonate lens

Mount Type
Panel mount or surface mount options

Scale Range
0-0.25 to 0-30 in. w.c. (6-760 mm) and 0-10 to 0-1500 Pa, depending on model

Accuracy
2% of full scale

Finishing
Black anodized aluminum and polycarbonate lens

Measure Pressure Of
Air and compatible gases

Accessories
Mounting bracket, hardware, installation instructions

Series A3000 Photohelic Pressure Switch-Gage Trade Information

Payment Terms
Cash on Delivery (COD), Cash Advance (CA), Cash Against Delivery (CAD), Cash in Advance (CID), Cheque

Main Export Market(s)
Australia, Central America, South America, Eastern Europe, Western Europe, Middle East, Asia, North America

Main Domestic Market
All India

About Series A3000 Photohelic Pressure Switch-Gage

Series A3000 Photohelic Pressure Switch-Gage

3-in-1 Indicating Gage, Lo-limit and Hi-limit Control

The SERIES A3000 Photohelic® Switch/Gages function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic® gage design. The Photohelic® switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25 in (0-6 mm) w.c. up to 30 psi (21 bar).

Please see SERIES AT3A3000 for ATEX approved.

DID YOU KNOW that you can add YOUR logo to our Photohelic® Switch/Gage, call customer service for details.

Product Applications

Air Conditioning Systems
Clean Rooms
Fume Exhaust Systems

Model	Description
A3000-0	Pressure switch/gage, range 0-.50" w.c.
A3000-00	Pressure switch/gage, range 0-.25" w.c.
A3001	Pressure switch/gage, range 0-1.0" w.c.
A3002	Pressure switch/gage, range 0-2.0" w.c.
A3003	Pressure switch/gage, range 0-3.0" w.c.
A3004	Pressure switch/gage, range 0-4.0" w.c.
A3005	Pressure switch/gage, range 0-5.0" w.c.
A3006	Pressure switch/gage, range 0-6.0" w.c.
A3008	Pressure switch/gage, range 0-8.0" w.c.
A3010	Pressure switch/gage, range 0-10" w.c.
A3015	Pressure switch/gage, range 0-15" w.c
A3020	Pressure switch/gage, range 0-20" w.c.
A3025	Pressure switch/gage, range 0-25" w.c.
A3030	Pressure switch/gage, range 0-30" w.c
A3040	Pressure switch/gage, range 0-40" w.c.
A3050	Pressure switch/gage, range 0-50" w.c.
A3060	Pressure switch/gage, range 0-60" w.c.
A3080	Pressure switch/gage, range 0-80" w.c
A3100	Pressure switch/gage, range 0-100" w.c
A3150	Pressure switch/gage, range 0-150" w.c

Precision and Flexibility for Critical Applications

Engineered for precision, the Series A3000 Photohelic Switch-Gage offers 2% full-scale accuracy. Its analog readout is complemented by bright LED setpoint indicators, enhancing process visibility. External adjustment knobs facilitate easy calibration without dismantling the unit. With compatibility for both 120/240 VAC and 24 VAC/DC operation, the device accommodates various electrical standards. This gage effectively combines measurement and control functions, streamlining installation and maintenance in HVAC and filtration systems.

Robust Design and User-Friendly Installation

Housed in black anodized die-cast aluminum with a polycarbonate lens, the A3000 is built for durability and visibility. The unit mounts readily in vertical, panel, or surface configurations and comes with a complete kit including hardware and instructions. Its double SPDT relays provide fast response and reliable actuation for safety-critical operations. The gage is compatible with air and a wide range of gases, supported by corrosion-resistant, long-lasting components for use in industrial environments.

FAQs of Series A3000 Photohelic Pressure Switch-Gage:

Q: How do I adjust the set points on the Series A3000 Photohelic Pressure Switch-Gage?

A: Set points can be quickly and easily adjusted using the accessible external knobs located on the units front face. These knobs allow precise adjustment without needing to remove the gage from its mounting position.

Q: What mounting options are available for installing the A3000 Photohelic Gage?

A: This gage can be mounted vertically, either panel-mounted or surface-mounted to suit your specific application. Mounting brackets and hardware are included to ensure secure and straightforward installation.

Q: When should the A3000 be used in a pressure monitoring system?

A: Use the Series A3000 when both visual indication and reliable switching of air or compatible gas pressures are crucial. Its ideal for applications requiring control action at user-set pressure points, such as HVAC, filters, or process automation.

Q: Where is the optimal environment for operating this gage?

A: The A3000 performs best in indoor, industrial settings within a 20 to 120F (-6.67 to 48.9C) temperature range. Its NEMA 2 (IP40) enclosure rating is suited for general-purpose environments with minimal moisture or dust exposure.

Q: What is the process for wiring the electrical connections on the A3000?

A: Wiring is straightforward: connect your power source (120/240 VAC or 24 VAC/DC as required) and relay contacts based on the included installation instructions. Double SPDT (Form C) relays allow for HI/LO switching configurations.

Q: How does the instantaneous mechanical response benefit system performance?

A: The mechanical sensing element provides near-instant pressure detection, while relay activation occurs in under 50 ms. This ensures rapid control or alarm response, reducing risks in critical process environments.

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