LVDT Radial Connector Bipolar DC-Powered

The Macro Sensors GHSDR 750 Series of 3/4 inch diameter spring-loaded DC-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 mating connector plug is supplied with a unit. 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 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.

Built-in electronics result in position sensors that operate from a DC input and generate a precalibrated DC output. The output from the GHSDR 750 Series are designed to operate in conjunction with many PLCs, digital indicators, A/D converters, computer-based data processors, and QC data collection systems.

Available in ranges of ±0.050 inch (±1.25 mm) to ±2.00 inches (±50.0 mm), the maximum linearity error for a GHSDR 750 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 GHSDR 750 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.

General Specifications

Input Power	±15 V DC, ± 25 mA
Full Scale Output	0 to ±10 V DC
Linearity Error	<±0.25% of FRO
Repeatability Error	<0.000025% inch (0.6 µm)
Operating Temperature	0°F to +160°F
Operating Temperature	-20°C to +70°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	GHSDR 750-050	GHSDR 750-125	GHSDR 750-250	GHSDR 750-500	GHSDR 750-1000	GHSDR 750-2000
Nominal Range	Inches	±0.050	±0.125	±0.25	±0.50	±1.00	±2.00
Nominal Range	Millimeter	±1.25	±3.0	±6.3	±12.5	±25	±50
Scale Factor	V/Inch	200	80	40	20	10	5
Scale Factor	V/Millimeter	8.0	3.3	1.6	0.8	0.4	0.2
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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