Dwyer A3000-250CM Photohelic Pressure Switch Gauge Range 0-250 cm w.c.

Product Description

Dwyer A3000-250CM Photohelic Pressure Switch Gauge Range 0-250 cm w.c.

Dwyer Instruments A3000-250CM

Photohelic Pressure Switch/Gage Range 0-250 cm w.c.

Order #: A3000-250CM

Mfg #: A3000-250CM

Photohelic Switch/Gages function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic gage design. The Photohelic switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25" (0-6 mm) w.c. up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar).

Product Highlights

Range: 0-250 cm w.c.

Dwyer A3000-250CM 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)