Dwyer A3000-20CM Photohelic Pressure Switch Gauge Range 0-20 cm w.c.

About Dwyer A3000-20CM Photohelic Pressure Switch Gauge Range 0-20 cm w.c.

Dwyer A3000-20CM Photohelic Pressure Switch Gauge Range 0-20 cm w.c.

Photohelic Pressure Switch/Gage Range 0-20 cm w.c.

Order : A3000-20CM

Mfg : A3000-20CM

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).

Availability:  Item ships in about Ships in 4-6 weeks

Product Highlights

Range:  0-20 cm w.c.

Gage Specifications 

Service: Air and non-combustible, compatible gases

Range:  0-200 cm w.c.

Accuracy: 2% of FS at 70F (21.1C)

Pressure Limits: -20" Hg. to 25 psig (-0.677 to 1.72 bar)

Temperature Limits: 20 to 120F. (-6.67 to 48.9C)

Process Connections: 1/8" female NPT 

Size: 4" (101.6 mm) dial face, 5" (127 mm) O.D. x 8-1/4" (209.55 mm) 

Weight: 4 lb (1.81 kg)

Switch Specifications

Switch Type: Each setpoint has 2 Form C relays (DPDT)

Repeatability: 1% of FS

Electrical Rating: 10A  28 VDC, 10A  120, 240 VAC

Electrical Connections: Screw terminals. Use 167F (75C) copper conductors only

Power Requirements: 120 VAC, 60 Hz

Mounting Orientation: Diaphragm in vertical position

Set Point Adjustment: Adjustable knobs on face

Agency Approvals: CE, CSA, UL