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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AC Operated HSA-750 Series Hermetically Sealed LVDT Position Sensors

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HSA 750 Hermetically Sealed AC-LVDT Position Sensors
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Description

Macro Sensors’ HSA 750 Series of 3/4 inch (19 mm) diameter AC-operated LVDTs is designed for a wide range of position measurement applications. These are rugged hermetically sealed sensors, constructed entirely of stainless steel, and intended for general industrial use. The coil windings are sealed against hostile environments to IEC standard IP-68 and electrical termination is through a sealed axial connector. The mating connector plug is supplied with the unit.

Available in ranges of ±0.050 inch (±1.25 mm) to ±10.0 inches (±250 mm), HSA 750 Series sensors feature the high resolution, excellent repeatability, and low hysteresis associated with LVDT technology, as well as the highest sensitivity consistent with good linearity. The maximum linearity error for any of these sensors is ±0.25% of full range output using a statistically best-fit straight line derived by the least squares method.

Macro Sensors offers several standard options that permit a user to customize HSA 750 LVDTs, including Teflon® bore liners and metric threaded cores, as well as smaller diameter and low mass cores. In addition, Macro Sensors can provide a range of mounting accessories and core extension rods. On special order, the HSA 750 Series can be constructed for resistance to mild nuclear radiation, as well as for immersion in pressurized fluids and to withstand higher operating temperatures.

All HSA 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 HSA 750 Series LVDT. Details can be found in series 9000 technical bulletins.

Features

Ranges of ±0.050 inch to ±10.0 inches

In-line connector, mating plug included

Environmentally sealed to IEC IP-68

Non-linearity less than ±0.25% of FRO

Applications

Machine tool positioners

Materials testing extensometers

Hydraulic cylinder position

Valve position sensing

Automatic assembly equipment

Corrosive environments

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
<0.01% of FSO
Hysteresis Error
<0.01% of FSO
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)
Vibration Tolerance
20 g to 2 kHz
Shock Survival
1000 g, 11 ms
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UNIT SPECIFICATIONS

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PARAMETER
UNIT OF MEASURE
HSA 750
-050
HSA 750
-125
HSA 750
-250
HSA 750
-500
HSA 750
-1000
HSA 750
-2000
HSA 750
-3000
HSA 750
-4000
HSA 750
-5000
HSA 750
-7500
HSA 750
-10000
Nominal Range
Inches
±0.050
±0.125
±0.25
±0.50
±1.00
±2.00
 ±3.00
±4.00
±5.00
±7.50
 ±10.00
Nominal Range
Millimeter
±1.3
±3.0
±6.3
±12.5
±25
±50
 ±75
±100
±125
±190
 ±250
Sensitivity
mV/V/
.001 Inch
6.1
3.9
2.4
0.63
0.61
0.37
0.25
0.17
0.12
0.11
0.07
Sensitivity
mV/V/
Millimeter
240
154
96
25
24
15
9.8
6.7
4.9
4.3
2.8
Primary Impedance
Ohms
325
735
1400
1200
1250
2150
2150
420
600
775
620
Dimension "A"
Inches
2.01
2.64
3.35
5.92
7.38
10.91
13.65
16.17
18.65
23.85
31.66
Dimension "A"
Millimeter
51.1
67.1
85.1
150.4
187.5
277.1
346.1
411
473.7
606
804
Dimension "B"
Inches
0.80
1.25
1.65
3.45
3.45
5.30
6.20
6.20
6.20
7.00
9.50
Dimension "B"
Millimeter
20.3
31.7
41.9
87.6
87.6
134.6
157.5
157.5
157.5
177.8
241.3
Dimension "N"
Inches
0.63
0.94
1.32
2.57
3.32
5.07
6.29
7.65
8.94
11.52
15.42
Dimension "N"
Millimeter
16
24
33
65
84
129
160
194
227
293
392
Weight, Body
Ounces
1.6
2.1
2.5
3.3
4.3
6.2
8.2
9.2
10.0
14.2
18.3
Weight, Body
Grams
45
59
71
93
122
176
232
260
283
402
519
Weight, Core
Ounces
0.08
0.12
0.18
0.40
0.40
0.65
0.80
0.80
0.80
0.90
1.20
Weight, Core
Grams
2.4
3.7
4.8
11.6
11.6
18
22
22
22
25.5
34

 

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Mechanical Drawing & Wiring Diagrams

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HSA 750 Hermetically Sealed AC-LVDT Position Sensors - Mechanical Drawing and Wiring Diagram

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Support Electronics

The following Signal Conditioners are compatible with the HSA 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 HSA 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

• For standard HSA 750, order by model number with range.
• For metric threaded core option, add -006 after model number with range.
• For Teflon® bore liner option, add -010 after model number with range.
• For small diameter core option, add -020 after model number with range.
• For multiple options, add sum of dash numbers after model number with range.
• For accessories, please visit the accessories page.

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