About Dwyer A3300-30MM Photohelic Pressure Switch Gauge
Dwyer A3300-30MM Photohelic Pressure Switch Gauge Range 15-0-15 mm w.c.
Dwyer A3300-30MM Photohelic Pressure Switch/Gauge (15-0-15 mm w.c.)
Model: A3300-30MM
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 A3300-30MM 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 A3300-30MM 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 at 70F (21.1C),3% on -0,4% 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:4 lb (1.81 kg)
Advanced Pressure Measurement and Versatile ApplicationsThe Dwyer A3300-30MM Photohelic Gauge seamlessly integrates pressure monitoring with switch capability, making it particularly valuable in environments requiring precise control. Its wide range of finishes and robust construction ensure reliability and aesthetic adaptability for varying industrial setups. From clean rooms to HVAC and fume exhaust systems, this gauge is built for dependable use in challenging environments where pressure consistency is critical.
Precision Engineering for Reliable ResultsEquipped with an aluminum pointer and a clearly marked 4-inch dial face, the A3300-30MM provides accurate measurements critical for sensitive processes. Its 2% accuracy at standard conditions helps deliver trustworthy performance. This attention to precision makes it suitable across a host of industries handling steam, oil, or gas, enabling users to maintain optimal system operation and safety standards.
FAQ's of Dwyer A3300-30MM Photohelic Pressure Switch Gauge:
Q: How does the Dwyer A3300-30MM Photohelic Pressure Switch Gauge operate in an air conditioning system?
A: The gauge monitors differential pressure and, as needed, activates switch contacts when preset pressure limits are reached, automating the control of air flow and maintaining ideal system conditions.
Q: What are the main benefits of using this pressure gauge in clean rooms?
A: It provides precise monitoring and switching to ensure pressure remains within safe and clean operational parameters, helping maintain contamination-free environments crucial in clean rooms.
Q: When should calibration be verified for optimal accuracy?
A: Calibration should be checked periodically, typically during routine maintenance or when readings appear inconsistent, ensuring the gauge remains within its 2% accuracy specification.
Q: Where is the best place to mount the A3300-30MM Pressure Switch Gauge?
A: Panel mounting is recommended for this model as it provides secure installation, clear visibility, and easy access for monitoring and adjustments in facility control rooms or process panels.
Q: What is the process for setting the pressure range on this gauge?
A: Adjust the set point on the dial face following manufacturer guidance, aligning with the desired switching threshold within the 15-0-15 mm w.c. range for your application's requirements.
Q: Which substances can be measured with the Dwyer A3300-30MM?
A: This model is designed to measure the pressure of air, steam, oil, and gas, making it versatile for a variety of industrial and laboratory uses.
Q: Why is this pressure gauge ideal for exporters or traders in India?
A: Its robust build, multiple finishes, and compliance with industry standards make it suitable for diverse markets, providing reliability and adaptability for international shipments and local installations alike.