Dwyer A3020 Photohelic Pressure Switch Gauge

Product Description

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 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)