Dwyer ACT-DA04 is a pneumatic and electric actuator designed for hazardous locations. It can operate in temperatures ranging from -40 to 140°F and is available in power requirements of 110 VAC, 220 VAC, 24 VAC, or 24 VDC. With a NEMA 7 enclosure rating, it has 1/2" female NPT electrical connections and is made of powder-coated aluminum. The DA series is double-acting, while the SR series is spring return. It features a position indicator, two limit switches, and NAMUR standard accessory mounting. The maximum supply pressure is 120 psi and the supply pressure ranges from 40 to 115 psi for DA and 80 psi for SR. It has a modulating input of 4 to 20 mA.