Description
The A3000 Series Photohelic® pressure/gauge switches function as versatile, highly repeatable pressure switches combined with a precision gauge using the proven Magnehelic® gauge design. The Photohelic® pressure/gauge switches measure and control positive, negative, or differential pressures of air and compatible gases. Standard models are rated for a pressure of 25 psig (1.7 bar), with options up to 35 psig (2.4 bar) or 80 psig (5.5 bar). Two DPDT phototransistor relays are included for high and low limit control. The easy-to-adjust setpoint indicators are controlled by knobs on the gauge face. The dead zone for each setpoint is the width of a needle, less than 1% of full scale. Setpoints can be locked to provide a variable dead zone, ideal for controlling fans, dampers, and other devices. The pressure gauge reading is continuous and unaffected by the pressure switch operation, even in the event of a power outage. Choose from full-scale pressure ranges from 0 to 0.25 inches (0 to 6 mm) of water column, up to 30 psi (21 bar).
Product Applications
- Air Conditioning Systems
- Cleanrooms
- Fume Extraction Systems
