July 17, 2017…H.G. Schaevitz Alliance Sensors Group released its LA-27-A series LVDT linear position sensors designed to handle the environment found around power generation turbines. Available in ranges from 3 inches (75 mm) to 15 inches (375 mm), the LA-27-A is designed for valve position feedback in steam and hydro power plants, as well as use in heavy duty applications like factory automation, civil engineering, and fluid power systems. It can operate in hostile factory environments such as lubricant and chemical mists, airborne grit and dust, and survive industrial wash downs.
Mated with ASG's model S1A DIN-rail-mountable LVDT signal conditioner, an LA-27-A LVDT becomes a solution for heavy duty position sensing applications.
LA-27-A Features:
- Stock ranges from 3 inches to 15 inches (75 mm to 375 mm)
- Core enclosed in 3/8 inch (9.5 mm) diameter extension rod with 5/16-24 or 8 mm male threaded end
- 1.050 inch (26.7 mm) diameter heavy wall aluminum housing (stainless steel available)
- Two double-contact shaft seals keep out contaminants
- Heavy duty connector or cable termination
- Continuous operation to 250 °F (120 C)
- Environmentally sealed to IEC IP-68
The LVRTs and LVDTs used on steam control and transfer valves, for example, a GE 119C9638, 119C9639, and 196C8768, or a Westinghouse 738J204, can all be replaced with this much heavier duty sensor. A really common problem with current GE and Westinghouse models is that the core vibrates and breaks off from its extension rod. The core of an LA-27-A is totally enclosed in an extension rod assembly from which it can never break loose, while offering a male thread for mechanical connection. An LA-27-A series LVDT can be installed with ASG-provided mounting clamps that can be fastened using the same holes as utilized for the GE steam turbine LVRTs.
