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Series A3000 Photohelic Pressure Switch-Gage

Series A3000 Photohelic Pressure Switch-Gage
Series A3000 Photohelic Pressure Switch-Gage
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Product Code : Series A3000
Brand Name : DWYER USA
Product Description

Series A3000 Photohelic Pressure Switch-Gage

3-in-1 Indicating Gage, Lo-limit and Hi-limit Control

The SERIES A3000 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. 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 in (0-6 mm) w.c. up to 30 psi (21 bar).

Please see SERIES AT3A3000 for ATEX approved.

DID YOU KNOW that you can add YOUR logo to our Photohelic® Switch/Gage, call customer service for details.

Product Applications

  • Air Conditioning Systems
  • Clean Rooms
  • Fume Exhaust Systems


 A3000-0Pressure switch/gage, range 0-.50" w.c. 
 A3000-00Pressure switch/gage, range 0-.25" w.c. 
 A3001Pressure switch/gage, range 0-1.0" w.c. 
 A3002Pressure switch/gage, range 0-2.0" w.c. 
 A3003Pressure switch/gage, range 0-3.0" w.c. 
 A3004Pressure switch/gage, range 0-4.0" w.c. 
 A3005Pressure switch/gage, range 0-5.0" w.c. 
 A3006Pressure switch/gage, range 0-6.0" w.c. 
 A3008Pressure switch/gage, range 0-8.0" w.c. 
 A3010Pressure switch/gage, range 0-10" w.c. 
 A3015Pressure switch/gage, range 0-15" w.c 
 A3020 Pressure switch/gage, range 0-20" w.c.
  A3025Pressure switch/gage, range 0-25" w.c. 
  A3030Pressure switch/gage, range 0-30" w.c 
  A3040 Pressure switch/gage, range 0-40" w.c.
  A3050Pressure switch/gage, range 0-50" w.c. 
  A3060 Pressure switch/gage, range 0-60" w.c.
  A3080Pressure switch/gage, range 0-80" w.c 
  A3100Pressure switch/gage, range 0-100" w.c 
  A3150Pressure switch/gage, range 0-150" w.c 





Sales Office:-Plot No. X/852, Chand Mohalla, Street No: 11 Gandhi Nagar Industrial Area, Near Ramgareya Gurdwara, Delhi - 110031, India
Mr R. P. Sharma (Proprietor)
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