GHR-750-A LVDT AC Position Sensor Spring Loaded

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• Spring loaded AC LVDT sensor with Radial connector
• 1/2"-20 mounting thread, 0.75" OD stainless steel housing
• Stroke lengths from ±0.050 to ± 2.0 inches
• Non-linearity better than ±0.25% of FS
• Sealed to IP68

The HGSI GHR-750-A Series of 3/4 inch diameter spring-loaded AC-LVDTs are designed for a wide range of position measurement and dimensional gaging applications. These rugged hermetically sealed sensors are constructed entirely of stainless steel and intended for general industrial use. The coil windings are sealed against hostile environments to IEC standard IP-68. Electrical termination is through a radially mounted sealed connector, which results in a much reduced installed length. The through-bore design allows for air purging of the sensor’s bearings to remove potential contaminants.

The sensor consists of a spring loaded shaft running in a precision sleeve bearing and connected to the core of an LVDT. The use of a precision sleeve bearing results in measurement repeatability of 0.000025 inches (0.6 µm) or better. The output from the LVDT can be connected to any standard LVDT signal conditioner and then passed to a gaging column display, digital readout, or computer based data acquisition system.

The GHR-750-A Series probe shaft is fully extended by a spring exerting a nominal force of 6 to 20 ounces depending upon total range. The contact tip supplied is an AGD standard number 9 made from chrome plated hardened tool steel. It is fully interchangeable with other AGD contact tips.

Available in ranges of ±0.050 inch (±1.25 mm) to ±2.00 inches (±50.0 mm), the maximum linearity error for a GHR-750-A Series sensor is ±0.25% of full range output using a statistically best-fit straight line derived by the least squares method.

For simplified mounting the GHR-750-A has a 1/2-20 UNF 2A thread on the front of the housing, permitting the user to install the LVDT in a mating threaded part or by using the two hex nuts furnished with the sensor. This results in a ready-to-use package for position measurements and longer range gaging applications.

Part Numbers




Technical Specifications

Input Voltage:

3 Vrms (nominal)

Input Frequency:

2.5 to 3.0 kHz

Linearity Error:

<±0.25% of FRO


<0.000025 inch (0.6 µm)

Operating Temperature:

-55°C to +105°C (65°F to +220°F)

Thermal Coefficient of Sensitivity:

-0.02%/°C (nominal) / -0.01%/°F (nominal)




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