Dwyer PTGD-SC04A is a high-accuracy piston-type gauge designed for measuring differential pressure. It can handle temperatures of up to 176°F (80°C) with an accuracy of ±2% FS. It is suitable for use with compatible gases and liquids and can be mounted in any position. The wetted materials include aluminum or 316 SS for the gauge body, piston, and spring; Buna-N or PTFE for the seals; and Nylon 6 30% glass filled for the dial case. The pressure limit is 3000 psi (206 bar) for the aluminum body and 6000 psi (413 bar) for the SS body. The gauge comes with 1/4" female NPT end connections standard, with the option for 1/4" female NPT back or bottom connections and 1/4" BSP. It is available in two sizes: 2.5" (63 mm) or 4.5" (115 mm). The window is made of acrylic for easy viewing.