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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HSIR-750 Series Hermetically Sealed LVDT Position Transmitters

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Description

The HSIR 750 Series of 3/4 inch diameter, loop powered 4-20 mA LVDT position transmitters is designed for a wide range of position monitoring and feedback 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 and input/output connections are made through a sealed radial connector located near one end. A mating connector plug is supplied with each unit.

The radial connector offers two important benefits. First, it results in a through-bore design, which permits access to either or both ends of the LVDT’s core for better mechanical support and core guidance, and easier cleanout in dusty or dirty locations. The second advantage of the radial connector is shorter installed length compared to units of the same range with axial connectors.

HSIR 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 a precalibrated 4-20 mA current loop operation. Units operate as either 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 1 inch (25 mm) to 10 inches (250 mm), the maximum linearity error for an HSIR 750 Series sensor is ±0.25% of full range output using a statistically best-fit straight line derived by the least squares method. A version with </= ±0.10% linearity error is also available.

Macro Sensors offers several standard options that permit a user to customize HSIR 750 Series LVDTs, including Teflon® bore liners and metric threaded cores. In addition, Macro Sensors can provide mounting accessories and core extension rods.

Features

Standard measurement ranges of 1 inch to 10 inches

4 to 20 mA input/output

Non-linearity ±0.25% of FRO or better

Hermetically sealed for harsh environments

Radial connector, mating plug included

Through-bore operation

Applications

Machine tool positioners

Materials testing extensometers

Hydraulic cylinder position

Valve position sensing

Automatic assembly equipment

Corrosive environments

GENERAL SPECIFICATIONS

Loop Supply Voltage
10 V to 28 V DC
Loop Resistance (Min.)
50 Ohms
Output
4-20 mA
Output Noise & Ripple
</=10 µArms
Frequency Response (-3dB)
50 Hz (nominal)
Linearity Error
</= ±0.25% of FRO
</= ±0.10% optional
Repeatability Error
<0.01% of FRO
Hysteresis Error
<0.01% of FRO
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
Vibration Tolerance
20 g to 2 kHz
Shock Survival
100 g, 11 ms
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UNIT SPECIFICATIONS

PARAMETER
UNIT OF MEASURE
HSIR 750
-1000
HSIR 750
-2000
HSIR 750
-4000
HSIR 750
-6000
HSIR 750
-10000
Nominal Range
Inches
1.00
2.00
4.00
6.00
10.00
Nominal Range
Millimeter
25
50
100
150
250
Scale Factor
mA/Inch
16.0
8.0
4.0
2.67
1.6
Scale Factor
mA/Millimeter
0.63
0.31
0.16
0.10
0.06
Dimension "A"
Inches
7.35
8.70
12.20
14.95
19.95
Dimension "A"
Millimeter
186.7
221.0
309.9
379.7
506.7
Dimension "B"
Inches
3.45
3.45
5.30
6.20
6.20
Dimension "B"
Millimeter
87.6
87.6
134.6
157.5
157.5
Dimension "S"
Inches
2.04
2.31
2.97
3.38
3.93
Dimension "S"
Millimeter
51.8
58.7
75.4
85.9
99.8
Weight, Body
Ounces
4.4
5.4
7.3
9.3
13.2
Weight, Body
Grams
124
153
207
263
374
Weight, Core
Ounces
0.40
0.40
0.65
0.78
0.78
Weight, Core
Grams
11.6
11.6
18.4
22.1
22.1
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Mechanical Drawing & Wiring Diagrams

HSIR Wiring Diagram

Loop Resistance vs. Minimum Loop Supply Voltage

HSIR: Loop Resistance vs. Minimum Loop Supply Voltage

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Ordering Information

• For standard HSIR 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 both options, add -016 after model number with range.
• For </= ±0.10% of FSO linearity error option, add -200 after model number with range.
• For accessories, please visit the accessories page.

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