The Istec SpeedSys T20 is a dual-channel speed monitor and switch designed for comprehensive speed monitoring and protection of rotating equipment, including turbines, compressors, and general automation applications . It converts signals from connected speed sensors into processed outputs, offering advanced monitoring features such as overspeed, underspeed, acceleration protection, reverse rotation detection, creep detection, and standstill monitoring .

The T20 supports both 3-wire voltage sensors (Hall-effect and proximity) and 2-wire voltage sensors (MPU). It features two independent channels, each with a sensor input, and provides a fast relay hardware response time of 8ms. The unit boasts exceptional measurement accuracy of 0.05% over a frequency range of 0.3 Hz to 35 kHz . It includes four high-speed relays (two DPDT and two SPST), two analog outputs (4-20 mA), two frequency outputs, and two digital inputs for flexible control and integration .

Designed for seamless system integration, the T20 communicates via both Modbus TCP and Modbus RTU protocols. It features a redundant power supply for high availability and is housed in a compact DIN-rail mounted module with push-in connectors for efficient wiring and installation. Additional features include a signal filter and line amplifier to ensure signal integrity in challenging environments. The T20 is an ideal solution for both new installations and retrofits, providing robust speed monitoring in a compact form factor .