The Istec SpeedSys T30 is a triple-channel speed monitor and switch designed for the highest reliability in speed monitoring of critical rotating machinery such as gas, steam, and hydro turbines . As part of the SpeedSys tachometer series, it provides comprehensive monitoring functions including overspeed, underspeed, acceleration, creep, standstill, and reverse rotation detection, along with dynamic sensor diagnostics .

The T30 features three fully independent channels, each with its own sensor input for Hall-effect, proximity, or MPU sensors. It offers an exceptional measurement accuracy of 0.05% across a frequency range of 0.3 Hz to 35 kHz and a fast relay hardware response time of 8ms . The unit is equipped with six high-speed relays (three DPDT and three SPST) for flexible alarm and control configurations. It also provides three analog outputs (4-20 mA), three frequency outputs, and three digital inputs .

Designed for maximum availability, the T30 features a triple redundant power supply and comprehensive communication capabilities via Modbus TCP. It can also function as an extension module for the SIL-rated SpeedSys 200/300 overspeed protection systems, adding additional relays, monitoring features, and enhanced Modbus connectivity. The DIN-rail mounted module includes signal filters and line amplifiers to maintain signal integrity, making it a robust and versatile solution for the most demanding speed monitoring applications .