Dwyer A3030 Photohelic Pressure Switch Gauge

About Dwyer A3030 Photohelic Pressure Switch Gauge

Dwyer A3030 Photohelic Pressure Switch Gauge Range 0-30 Inch w.c.

Dwyer A3030 Photohelic Pressure Switch/Gauge (0-30"w.c.)

Model: A3030

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 A3030 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 A3030 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)

Robust Construction for Reliable Performance

Crafted from high-quality metal alloy, the Dwyer A3030 Photohelic Pressure Switch Gauge is built to withstand demanding environments. The sturdy housing, coupled with a 4-inch glass-protected dial, ensures durability and readability, while multiple finishing options, including matte and polished, provide both functionality and aesthetic appeal.


Versatile Pressure Measurement Applications

Ideal for monitoring steam, oil, or gas pressures in a range of industrial contexts, this gauge suits clean rooms, HVAC systems, and fume exhaust setups. Its accuracy and adaptability make it a dependable choice for manufacturers, exporters, and system integrators looking for reliable pressure management solutions.