4-20 mA LVDT Position Sensor Spring Loaded GHSI-750 Series

 The Macro Sensors GHSI 750 Series of 3/4 inch diameter spring-loaded, loop-powered LVDTs are designed for a wide range of position monitoring, feedback, 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. The input/output connections are made through a sealed axial connector, and a mating connector plug is supplied with each unit.

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 0.0001 inches (2.5 ìm) or better. The 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 black oxide hardened tool steel. It is fully interchangeable with other 4-48-threaded AGD contact tips.

GHSI 750 Series transmitters offer the frictionless operation, high resolution, excellent repeatability, and low hysteresis associated with LVDT technology, along with the convenience and simplicity of 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 ranges of 0.100 inch (2.5 mm) to 4.00 inches (100 mm), the maximum linearity error for a GHSI 750 Series sensor is ±0.10% of full range output using a statistically best-fit straight line derived by the least squares method.

GENERAL SPECIFICATIONS Loop Supply Voltage 10V to 28V DC Loop Resistance (Min.) 50 Ohms Output Current 4 to 20 mA, 2-wire loop Output Noise & Ripple </= 10µArms Frequency Response (-3dB) 50 Hz (nominal) Linearity Error </= ±0.10% of FRO Repeatability Error <0.0001 inch (2.5µm) Operating Temperature -20°F to +175°F Operating Temperature -30°C to +80°C Thermal Coefficient of Scale Factor -0.015%/°F (nominal) Thermal Coefficient of Scale Factor -0.027%/°C (nominal)
UNIT SPECIFICATIONS PARAMETER UNIT OF MEASURE GHSI 750-100 GHSI 750-250 GHSI 750-500 GHSI 750-1000 GHSI 750-2000 GHSI 750-4000 Nominal Range Inches 0.10 0.25 0.50 1.00 2.00 4.00 Nominal Range Millimeter 2.5 6.3 12.5 25 50 100 Scale Factor mA/Inch 160 64 32 16 8 4 Scale Factor mA/Millimeter 6.4 2.6 1.28 0.64 0.32 0.16 Pretravel Inch 0.12 0.13 0.10 0.10 0.05 0.02 Pretravel Millimeter 3.0 3.3 2.5 2.5 1.3 0.5 Overtravel Inch 0.12 0.13 0.10 0.10 0.05 0.02 Overtravel Millimeter 3.0 3.3 2.5 2.5 1.3 0.5 Dimension "A" Inches 5.46 6.10 6.86 11.36 13.82 21.75 Dimension "A" Millimeter 139 155 174 289 351 553 Dimension "B" Inches 4.36 4.99 5.75 9.87 11.40 17.19 Dimension "B" Millimeter 111 127 146 251 291 437 Dimension "C" Inches 2.82 3.44 4.20 6.70 8.20 11.71 Dimension "C" Millimeter 72 87 107 170 208 297 Weight Ounces 3.1 3.6 4.3 6.4 6.7 10.5 Weight Grams 85 102 170 180 185 296

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