Products people just won't stop using


The HA100 is an electro-hydraulic proportional actuator with an internal mechanical position feedback that was originally designed in the late 90s.

request info Download


The HCX21 is a single stage, electric current-to-hydraulic pressure (I/H) converter that was originally designed in 1984

request info Download


The M305 is a general-purpose, jumper-configurable analog servo controller. It was actively promoted in the 80s and early 90s to provide closed-loop control of hydraulic actuator systems. Used in hundreds of diverse applications ranging from geothermal steam turbine steam valve servo control to ship-board gas turbine fuel valve actuator control. It was the predecessor to the M306 (also discontinued.)

We have a direct replacement for the M305, the DSC100.

request info Download


The M306 product release was an update to the M305,  a general-purpose,  jumper-configurable analog servo-controller used in closed-loop control of hydraulic actuator systems.

We have a direct replacement for the M306, the DSC100.

request info Download


The TS110 is an analog self-powered single loop controller that has been sold and supported since 1990. It was designed to be used as a replacement for mechanical-hydraulic controllers found on general purpose steam turbines. It’s been used to control turbines in applications ranging from cane crushing drives in remote sugar refining mills to auxiliary pumps in petroleum refining facilities.

We have a direct replacement for the TS110, the TS300.

request info Download


The TS310 is the most popular digital controller Tri-Sen has made. The 310 was first released in 1984 as a user configurable turbine controller for pretty much anything that had to drive something else, including steam turbines, gas turbines, diesel or gas engines, driving generators, pumps, compressors, expanders and even hydro turbines. Functionality includes speed control, start-up control, process control, extraction/admission control, nozzle valves, generator control and overspeed trip.

We have a direct replacement for a TS310 controlling a single-valve steam turbine, the 310SV .

As a replacement for a TS310 used to control a multi-valve steam turbine (typically a "critical" steam turbine), we use a modern, redundant PLC platform.

request info Download


The TS410 was Tri-Sen’s second digital turbine control system specifically designed for turbine control in critical applications (the first was the TS500, oddly enough). The TS410 was released in the mid-1980s and continued to be sold through the 90s. As an alternative to repair, we can provide an economical, direct-replacement PLC solution. Send us your 410 configuration and we’ll have a system ready to install in 12 weeks.

request info Download


The TS160 is a “stand-alone” multi-loop microprocessor-based controller designed to control compressor surge and performance for motor or turbine-driven centrifugal and axial compressors in process applications, including refineries, petrochemicals, paper manufacturing, and gas transmission pipelines. If form factor isn’t an issue, we have some great replacement ideas, including integration of the surge and performance controls into your DCS.

request info Download

Contact Us