Dwyer DFMT-40A is a Digital Paddlewheel Flow Transmitter designed for compatible clean liquids. It has a temperature range of -4 to 194°F (-20 to 90°C), with an accuracy of ±1.5% FS. The transmitter requires 12 to 24 VDC power and has an IP65 rated ABS plastic housing. It features an analog output of 4 to 20 mA and a NPN square wave pulse output with adjustable frequency and pulse width. The LCD display measures 2.38 x 1.25" and the wetted materials include PVDF, ceramic, and fluoroelastomer. The pressure limit is 145 psi (1.0 MPa) and it can display a maximum totalizing value of 9,999,999,999.