Dwyer A3330 Photohelic Pressure Switch Gauge

About Dwyer A3330 Photohelic Pressure Switch Gauge

Dwyer A3330 Photohelic Pressure Switch Gauge Range 15-0-15 Inch w.c.

Dwyer A3330 Photohelic Pressure Switch/Gauge (15-0-15 Inch w.c.)

Model: A3330

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 A3330

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 A3330 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 48.9C),-20 to 120°F(-28 to 48.9C) 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)