Product News: Sensors Monitors & Transducers

LVDT Linear Position Sensors target power generation markets.

Press Release Summary:

LVDT Linear Position Sensors target power generation markets.

Nov 12, 2012 - UL/ULC listed and ATEX-approved, HLR 750 Series is suitable for gas turbine environments. Sensors are constructed entirely of stainless steel and are hermetically sealed for resistance against environmental elements. With electronics remotely located, AC-operated units can withstand temperature of 300°F on turbine. Available in full-scale measurement ranges from ±1 in. to ±10 in., sensors offer repeatability better than 0.01% of FS and non-linearity of less than 0.25% of full range output.

Macro Sensors - Pennsauken, NJ

Original Press Release

MacroSensors Introduces UL/ULC Listed and ATEX Approved Position Sensors For Worldwide Operation in Power Generation Markets

Press release date: Oct 24, 2012

Pennsauken, NJ, …Macro Sensors, a sensor company specializing in the manufacture of LVDT-based linear displacement sensors and gaging probes, offers the HLR 750 Series of UL/ULC listed and ATEX-approved LVDT Linear Positions Sensors for use in the high temperature and  highly volatile environments of gas turbines. Ideal applications for the HLR series LVDTs include monitoring fuel transfer valves, micro fuel valve openings and hydro turbine servo motor operation. 

In addition to being UL/ULC listed for Class I, Division 2, Groups A, B, C, and D T3C Class I, Zone 2, AEx nC IIC T3Ex nC IIC T3, the highly rugged HLR Series of LVDT Linear Position Sensors are ATEX approved in Zone 1 and Zone 2 classifications, making them appropriate for use in potentially explosive environments such as gas turbines. As gaseous vapors are present in gas turbines, LVDTs installed on turbines must meet intrinsically safe parameters and be approved by these certifying agencies.  

The ability to separate LVDT electronics, which are located in the turbine control system, from the LVDT coils, is one of the main reasons that these sensors survive so well in power plants.   With electronics remotely located, these highly robust AC-operated LVDT Linear Position Sensors can withstand high temperatures of  300°F on the turbine.  For added protection against environmental elements, electronics can be installed in explosion-proof enclosures and connected to LVDTs using a suitable conduit.  Units feature a through-bore design along with lead wires that exit through a radially-mounted ½-14 NPT male threaded conduit for east attachment to an explosion-proof junction box as well as a conduit.

Available in full-scale measurement ranges from ±1 inch to ±10 inches, the highly rugged HLR 750 Series of LVDT Linear Position Sensors are constructed entirely of stainless steel and are hermetically sealed for resistance against environmental elements.  The LVDT Linear Position Sensors offer high resolution, excellent repeatability typically better than 0.01% of full scale and non-linearity of less than 0.25% of full range output.

To complete the measurement system, Macro Sensors supplies LVC Series Support Electronics for the HLR 750 series Position Sensors, which work well with either conventional differential input LVDT signal conditioners or ratiometric signal conditioning circuits. 

For more information on pricing, please contact Macro Sensors at or go to our web site at

About Macro Sensors
Macro Sensors’ extensive line of linear and rotary sensors are used for position measurement and feedback in a variety of industrial applications including factory automation, motion control systems, metal fabricating, automotive assembly as well as power plants, gas/steam turbines.   Incorporated in 1994, the Company offers more than 200 years of cumulative design and manufacturing experience by its key staff in serving its OEM and end-user international customer base.   On June 1, 2005, Macro Sensors was acquired by AST, manufacturer of state-of-the-art (Micro Electro Mechanical Structures) MEMS-based pressure sensors, transducers, and transmitters.   Common applications of AST sensor products are in industrial OEM, hydraulic systems, fuel cells, medical gases, HVAC/R, refrigeration, oil & gas exploration/production, and off-road vehicles. For more information on AST products and technology, visit the AST website at .