The PS41 Series of pressure switches uses an internal piston to allow high-proof pressure, while gaining sensitivity and accuracy from a diaphragm media interface, the company says. Repeatability is ± 2 percent of the full set point range of 3 to 100 psi (0.2 to 7 bar), while delivering a 350-psi proof pressure. The pressure switches are available in brass or stainless steel, a choice of six pressure port sizes (NPT, BSP, SAE; beginning at 1/8-inch), three SPST and SPDT switch circuits, and three set point ranges. The diaphragm can be specified in Viton, neoprene, or EPDM material. The operating temperatures for the units are -40 degrees to 180 degrees F.

Gems Sensors, One Cowles Rd., Plainville, CT 06062; 800-378-1600;

eProduct #186