GHS-Series LVDT Position Sensor

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Key features

• Ranges of 0.100 inch to 4.00 inches
• Non-linearity less than ±0.10%
• Repeatability OF <0.01%
• 0-10VDC or 4-20mA outputs
• Rugged, stainless steel construction
• Coil environmentally sealed to IEC IP-68

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About the Spring-loaded LVDT DC operated position sensor

The GHS 750 Series spring-loaded LVDTs are designed for a wide range of position measurement and dimensional gaging applications. These rugged, 3/4 inch diameter, hermetically sealed sensors are constructed entirely of stainless steel and are available in ranges of 0.100 inch (2.5 mm) to 4.00 inches (100 mm). The maximum linearity error for a GHS 750 Series sensor is ±0.10% of full range output. Units are supplied with built-in electronics for either DC operation with a pre-calibrated 0-10VDC output (GHSE) or 4-20 mA current loop operation (GHSI).

The sensor consists of a spring loaded shaft running in a precision sleeve bearing and connected to the core of the LVDT. The probe shaft is fully extended by a spring (k=0.23 lbs./in.), exerting a nominal force of 6 to 20 ounces depending upon total range. The hardened tool steel contact tip is an AGD standard number 9 and is fully interchangeable with other 4-48-threaded AGD contact tips. For simplified mounting, GHS sensors have a 1/2-20 UNF 2A thread on the front of the housing and are supplied with two hex nuts.

An air-extend/spring-retract option allows for a wide range of cycled position measurement and automated dimensional gaging applications. The shaft is extended by introduction of a low-pressure (10-40 psi), clean, dry air supply, with a regulated flow, through a barbed fitting on the end of the unit for 1/4 inch I.D. hose. With the release of pressure, an internal spring returns the probe to its retracted position.

Other features GHS-Series

• Axial or radial connectors w/ mating plug included
• Air-extend/spring-retract option

Applications for GHS-Series

• Industrial gaging systems
• Electronic dial indicators
• Fabricated metal products gaging
• Materials testing apparatus
• TIR measurements
• Steam turbine shell expansion
• Safety valve seating verification
• Pinch and gap roller alignment