Macro Sensors LVDTs: GHSIR-750-A Air-Extend/Spring-Retract AC-LVDT Position Sensors

Description

The Macro Sensors GHSIR 750-A Series of 3/4 inch diameter air-extend/spring-retract, loop powered LVDTs are designed for a wide range of cycled position monitoring, feedback, and automated dimensional gaging applications where it is necessary or desirable to move the probe out of the way between readings. 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. The input/output connections are made through a radially mounted sealed connector, which results in a much reduced installed length. A mating connector plug is supplied with each unit.

The sensor consists of an air-extend/spring-retract shaft running in a precision sleeve bearing and connected to the core of an LVDT. The shaft is extended by introduction of a low-pressure (10-30 psi), clean, dry air supply, with a regulated flow, through a 1/4 inch barbed fitting on the end of the unit. With the release of pressure, an internal spring returns the probe to its normal position. The use of a precision sleeve bearing results in measurement repeatability of 0.0001 inches (2.5 ìm) or better. The contact tip supplied is an AGD standard number 9 made from black oxide hardened tool steel. It is fully interchangeable with other 4-48-threaded AGD contact tips. The combination of air actuation and a through-bore design allows for repeated purging of the sensor's bearings to remove potential contaminants.

GHSIR 750-A Series transmitters offer the frictionless operation, high resolution, excellent repeatability, and low hysteresis associated with LVDT technology, along with the convenience and simplicity of a precalibrated 4-20 mA current loop operation. The unit can be operated either as 2-
wire loop-powered or 3-wire sourcing externally powered. The built-in electronics operate over a wide range of loop supply voltages and resistances, and are designed to operate with many PLCs, digital indicators, A/D converters, computer-based data processors, and QC data collection systems.

Available in measurement ranges of 0.100 inch (2.5 mm) to 4.00 inches (100 mm), the maximum linearity error for a GHSIR 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 GHSIR 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.

For additional information and important installation considerations, we strongly urge you to visit www.macrosensors.com/lvdt_macro_sensors/
lvdt_products/air_extend/


click the image for an enlarged view General Specifications Unit Specifications Mechanical Drawing & Wiring Diagram Ordering Information Tech Bulletin	Description The Macro Sensors GHSIR 750-A Series of 3/4 inch diameter air-extend/spring-retract, loop powered LVDTs are designed for a wide range of cycled position monitoring, feedback, and automated dimensional gaging applications where it is necessary or desirable to move the probe out of the way between readings. 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. The input/output connections are made through a radially mounted sealed connector, which results in a much reduced installed length. A mating connector plug is supplied with each unit. The sensor consists of an air-extend/spring-retract shaft running in a precision sleeve bearing and connected to the core of an LVDT. The shaft is extended by introduction of a low-pressure (10-30 psi), clean, dry air supply, with a regulated flow, through a 1/4 inch barbed fitting on the end of the unit. With the release of pressure, an internal spring returns the probe to its normal position. The use of a precision sleeve bearing results in measurement repeatability of 0.0001 inches (2.5 ìm) or better. The contact tip supplied is an AGD standard number 9 made from black oxide hardened tool steel. It is fully interchangeable with other 4-48-threaded AGD contact tips. The combination of air actuation and a through-bore design allows for repeated purging of the sensor's bearings to remove potential contaminants. GHSIR 750-A Series transmitters offer the frictionless operation, high resolution, excellent repeatability, and low hysteresis associated with LVDT technology, along with the convenience and simplicity of a precalibrated 4-20 mA current loop operation. The unit can be operated either as 2- wire loop-powered or 3-wire sourcing externally powered. The built-in electronics operate over a wide range of loop supply voltages and resistances, and are designed to operate with many PLCs, digital indicators, A/D converters, computer-based data processors, and QC data collection systems. Available in measurement ranges of 0.100 inch (2.5 mm) to 4.00 inches (100 mm), the maximum linearity error for a GHSIR 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 GHSIR 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. For additional information and important installation considerations, we strongly urge you to visit www.macrosensors.com/lvdt_macro_sensors/ lvdt_products/air_extend/	Features Low pressure air-extend / spring-retract plunger Full ranges of 0.100 inch to 4.00 inches 4 to 20 mA input/output Non-linearity of ±0.10% of FRO or better Repeatability of 0.0001 inch Through-bore design with radial connector; mating plug included Coil environmentally sealed to IEC IP-68 Applications Industrial gaging systems Steam turbine shell expansion Safety valve seating verification Materials testing apparatus Pinch and gap roller alignment