AST Macro Sensors - A Division of Howard A. Schaevitz Technologies Inc. - LVDT  Based Position Sensors and Support Electronics - Pennsauken, NJ, Phone: 856-662-8000, email: lvdts@macrosensors.com
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GHSAR 750 Spring Loaded AC-LVDT Position Sensors

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GHSAR 750 Series Spring-Loaded AC-LVDT Position Sensors
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Description

The Macro Sensors GHSAR 750 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 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 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 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 GHSAR 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 GHSAR 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.

All GHSAR 750 Series LVDTs will operate properly with any conventional differential input LVDT signal conditioners, but operation with ratiometric LVDT signal conditioning is not recommended. Macro Sensors offers a full line of LVDT signal conditioners that will deliver optimum performance from any GHSAR 750 Series LVDT. Details can be found in series 9000 technical bulletins.

Features

Ranges of ±0.050 inch to ±2.00 inches

Radial connector, mating plug included

Repeatability of 0.000025 inch

Non-linearity less than ±0.25% of FRO

Coil environmentally sealed to IEC IP-68

Through-bore design

Applications

Industrial gaging systems

Electronic dial indicators

Fabricated metal products gaging

Materials testing apparatus

Large shaft TIR measurements

GENERAL SPECIFICATIONS

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Input Voltage
3.0 Vrms (nominal)
Input Frequency
2.5 to 3.0 kHz
Linearity Error
<±0.25% of FRO
Repeatability Error
<0.000025 inch (0.6 µm)
Operating Temperature
-65°F to +220°F
Operating Temperature
-55°C to +105°C
Thermal Coefficient of Sensitivity
-0.01%/°F (nominal)
Thermal Coefficient of Sensitivity
-0.02%/°C (nominal)
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UNIT SPECIFICATIONS

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PARAMETER
UNIT OF MEASURE
GHSAR 750-050
GHSAR 750-125
GHSAR 750-250
GHSAR 750-500
GHSAR 750-1000
GHSAR 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
±25.0
 ±50 .0
Sensitivity
mV/V/
.001 Inch
6.1
3.9
2.5
0.65
0.61
0.37
Sensitivity
mV/V/
Millimeter
240
153
98
26
24
14
Primary Impedance
Ohms
325
735
1400
1200
1250
2150
Pretravel
Inches
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
Inches
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
4.61
5.26
6.02
10.54
12.81
20.91
Dimension "A"
Millimeter
117
134
153
268
322
531
Dimension "B"
Inches
3.51
4.15
4.91
9.05
10.51
16.35
Dimension "B"
Millimeter
89
105
125
230
267
415
Dimension "C"
Inches
1.97
2.60
3.35
5.88
7.34
10.87
Dimension "C"
Millimeter
50
66
85
149
186
276
Weight
Ounces
2.9
3.4
4.0
6.0
6.3
10.2
Weight
Grams
82
96
113
170
179
290

 

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Mechanical Drawing & Wiring Diagrams

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GHSAR 750 Series Spring-Loaded AC-LVDT Position Sensors - Mechanical Drawing and Wiring Diagrams

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Support Electronics

The following Signal Conditioners are compatible with the GHSAR 750 LVDT:

Model
Power Input
Output
10-30 V DC (24 V DC nominal, 100 mA max.) (10 V DC nominal, 160 mA max.)
0 to ±10 V DC, 5 mA max.
0 to 10 V DC, 5 mA max.
4 to 20 mA sourcing into 550 Ohms (max.) loop resistance

The following Digital Panel Meters are compatible with the GHSAR 750 LVDT:

Model
Power Input
Output
115 VAC to 220 V AC or 24 V DC optional
LED Readout, dual channel, 0 to 10 VDC output, Optional RS-232 or Ethernet
115 V AC to 220 V AC or 24 V DC optional
LED Readout, single channel, 0 to 10 VDC output, Optional RS-232
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Ordering Information

• Order by model number with range
• Find compatible accessories and signal conditioners

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