Pressure gauges suit gaseous and liquid media and will not corrode copper alloys. They are rated for pressures to 160 psi at temperatures from -40° to 150° F. They have an accuracy of 2.5% and come in sizes of 1 1 ⁄4 , 1 1 ⁄2 , 2, 2 1 ⁄2 , 3, 4, 5, and 6 in. for NPT, PT, and BSP connections of 1 ⁄4 , 3 ⁄8 , 1 ⁄2 , and 3 ⁄4 in.

Sang-A Pneumatic Corp., (310) 212-5568, www.spctrade.com