Shaft Encoder – Stevens Water

The Shaft Encoder by Stevens Water (PAT – Position Analog Transmitter) is a precision monitoring device designed for accurate water level measurement and shaft position encoding in wells, rivers, reservoirs, canals, and hydrological monitoring stations. It converts the mechanical movement of a float pulley or shaft into electrical output signals, allowing seamless integration with data loggers, telemetry systems, and chart recorders for continuous monitoring. It is commonly installed in gage houses over float wells and works efficiently with Stevens Type A and Type F chart recorders. Built with an incremental optical encoder, the system generates a reliable quadrature output signal with high precision and long-term stability. Its weather-resistant enclosure, low-power design, and rugged field construction make it ideal for remote installations and long-term unattended monitoring in harsh outdoor environments. The encoder input shaft supports standard Stevens float pulleys for beaded float lines or perforated tape systems.