Dwyer A3300-250PA Photohelic Pressure Switch Gauge Range 125-0-125 Pa.

About Dwyer A3300-250PA Photohelic Pressure Switch Gauge Range 125-0-125 Pa.

Dwyer A3300-250PA Photohelic Pressure Switch Gauge Range 125-0-125 Pa.

Dwyer A3300-250PA Photohelic Pressure Switch/Gauge (125-0-125 Pa.)

Model: A3300-250PA

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 A3300-250PA 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 A3300-250PA 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)