Dwyer A3020 Photohelic Pressure Switch Gauge Range 0-20 Inch w.c.

About Dwyer A3020 Photohelic Pressure Switch Gauge Range 0-20 Inch w.c.

Dwyer A3020 Photohelic Pressure Switch Gauge Range 0-20 Inch w.c.

Dwyer A3020 Photohelic Pressure Switch/Gauge (0-20"w.c.)

Model: A3020

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 A3020 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 A3020 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)