About Dwyer A3203 Photohelic Pressure Switch Gauge
Dwyer A3203 Photohelic Pressure Switch Gauge Range 0-3 psi
Dwyer A3203 Photohelic Pressure Switch/Gauge (0-3 psi)
Model: A3203
Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Cover is clear poly carbonate plastic. Gage pointer and light shutter are mounted on helix and balancing counterweight.
Dwyer A3203 Offers
Features
- Measure 4 to 20 mA signals without "breaking the loop"
- Measure mA signals for PLC and control system analog I/O
- Dual backlit display with both mA measurement and percent of 4 to 20 mA span
- Measurement Spotlight illuminates hard to see wires in dark enclosures
- Detachable clamp with extension cable for measurements in tight locations
- Measure 10 to 50 mA signals in older control systems using the 99.9 mA range
- Automatically change the 4 to 20 mA output for remote testing
- Power saving features, auto-off, backlight timeout extend battery life
- Hold function captures and displays changing measurements
Applications
- Air Conditioner Systems
- Clean Rooms
- Fume Exhaust Systems
- Dwyer A3203 Specifications
Switch Specifications
- Switch Type:Each set point has 2 Form C relays (DPDT)
- Repeatability:1% of FS
- Electrical Rating:10 A at 28 VDC,10 A at 120,240 VAC
- Electrical Connections:Screw terminals. Use 167F (75C) copper conductors only
- Power Requirements:120 VAC,50/60 Hz,240 VAC and 24 VAC power optional
- Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations
- Set Point Adjustment:Adjustable knobs on face
- Agency Approvals:CE, CSA, UL
Gauge Specifications
- Service:Air and non-combustible, compatible gases
- Accuracy: 2% of FS at70F (21.1C)3% on -04% on -00 models
- Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar),MP option;35 psig (2.41 bar),HP option; 80 psig (5.52 bar)
- Temperature Limits:20 to 120F.(-6.67 to 48.9C),-20 to 120F (-28 to 48.9C) with low temperature option
- Process Connections:female NPT
- Dimensions:4"(101.6 mm) dial face,5 x 8" (127 x 209.55 mm)
- Weight:4lb(1.81 kg)
Durable Construction for Industrial SettingsFabricated from strong metal alloys and a clear glass dial, the Dwyer A3203 is built to withstand demanding environments. Multiple finishing options such as matte, polished, galvanized, and antique provide resistance to corrosion and wear, making it a reliable choice for long-term use in various industrial applications.
Precise Pressure Monitoring and ControlThis gauge ensures accurate measurements (2% FS at 70F) with a broad 0-3 psi range, making it suitable for a wide array of processes involving steam, oil, gas, and water. Its dual pressure switch and indicating pointer feature allow for efficient system management and safety monitoring.
Flexible Usage in Critical ApplicationsWith a user-friendly panel mount design and a compact 4" dial face, the Dwyer A3203 integrates easily into air conditioning systems, clean rooms, and fume exhaust systems. Its robust construction and customizable finishes support diverse operational requirements in exporter, manufacturer, supplier, and trader environments.
FAQ's of Dwyer A3203 Photohelic Pressure Switch Gauge:
Q: How does the Dwyer A3203 Photohelic Pressure Switch Gauge operate?
A: The Dwyer A3203 functions by sensing pressure changes and displaying values on its 4" dial. It combines photohelic switching technology with a pointer gauge, allowing users to monitor and control system pressure with precision. When pressure exceeds set limits, its internal switches can trigger alarms or other automated responses.
Q: What materials are used in the construction of this gauge?
A: The gauge features a strong metal alloy body, a durable glass dial face, and a pointer crafted from aluminum. This ensures both accuracy and long-lasting performance in challenging environments.
Q: Where can the Dwyer A3203 be installed?
A: Its panel-mount design makes it ideal for installation in air conditioning systems, clean rooms, and fume exhaust systems, as well as other industrial setups requiring pressure monitoring for steam, oil, gas, or water.
Q: What process conditions is this gauge suitable for?
A: With a scale range of 0-3 psi and an accuracy of 2% FS at 70F, the Dwyer A3203 is engineered for standard pressure monitoring and control processes involving air, steam, oil, gas, or water. Matte, polished, galvanized, and antique finishes allow it to perform reliably under various environmental conditions.
Q: What are the key benefits of using this pressure switch gauge?
A: Users benefit from its precise accuracy, dual function as a gauge and switch, high durability, versatile mounting, and suitability for a wide range of industrial applications. These features help ensure smooth and safe operation of critical systems.
Q: When should I consider using this gauge in my system?
A: Consider the Dwyer A3203 whenever accurate and reliable low-pressure monitoring is crucial-especially in HVAC systems, clean rooms, or exhaust systems where both visual feedback and switching capability are needed.
Q: How does the Dwyer A3203 ensure measurement reliability?
A: Its precision mechanism, quality materials, and protective finishes help maintain consistent accuracy (within 2% FS at standard temperature), ensuring dependable pressure measurements even in demanding environments.