Dwyer A3301 Photohelic Pressure Switch Gauge Range .5-0-.5 Inch w.c.

About Dwyer A3301 Photohelic Pressure Switch Gauge Range .5-0-.5 Inch w.c.

Dwyer A3301 Photohelic Pressure Switch Gauge Range .5-0-.5 Inch w.c.

Dwyer A3301 Photohelic Pressure Switch/Gauge (.5-0-.5 Inch w.c.)

Model: A3301

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic® Switch/Gage set point 

Mechanism. Cover is Clear Polycarbonate Plastic. Gage Pointer and Light Shutter Are Mounted on Helix and Balancing 

Counterweight.

Dwyer A3301

Features

1. Measure 4 to 20 mA Signals Without "Breaking the Loop"
2. Measure mA Signals For PLC and Control System Analog I/O
3. Dual Backlit Display With Both mA Measurement And Percent of 4 to 20 mA Span
4. Measurement Spotlight illuminates hard to see wires in dark enclosures
5. Detachable clamp with extension cable for measurements in tight locations
6. Measure 10 to 50 mA signals in older control systems using the 99.9 mA range
7. Automatically change the 4 to 20 mA output for remote testing
8. Power saving features, auto-off, backlight timeout extend battery life
9. Hold function captures and displays changing measurements

Applications

1. Air Conditioner Systems
2. Clean Rooms
3. Fume Exhaust Systems

Dwyer A3301 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 167°F (75°C) 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 70°F (21.1°C),±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 120°F. (-6.67 to 48.9°C),-20 to 120°F (-28 to 48.9°C) with low temperature option
• Process Connections: ? female NPT
• Dimensions: 4" (101.6 mm) Dial Face,5 x 8¼" (127 x 209.55 MM)
• Weight: 4 lb (1.81 kg)