The Series 604A Differential Pressure Transmitter offers very low ranges down to 0-0.4" w.c. (25 Pa) yet withstands continuous pressure to 30 psig (2 bar). The tough filled Nylon housing features simple surface mounting arrangement and barbed connections. The units are compact and lightweight yet provide overall accuracy of ±2%. Output signal is 4-20 mA. Zero and span adjustments plus terminal block connections are easily accessible but protected in auxiliary housing.