.پرشر سوئیچ گیج اختلاف فشار Dwyer آمریکا مدل 43015

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).