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Home » All LVDT Products » Free Core » AC

AC LVDT Position Sensor, 0.812" Diameter Replacement PRH-812 Series

AC LVDT Position Sensor, 0.812" Dia. Replacement
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SKU: PRH-812
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Product Info:

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Macro Sensors' PRH 812 Series of AC-LVDTs are 0.812 inch (20.6 mm) diameter general-purpose LVDT linear position sensors that feature larger core-to-bore clearance than the standard PR 750 Series of AC-LVDTs. They were designed primarily for use in legacy OEM applications, and are cost-effective exact replacement LVDTs that offer the same form, fit, and function as competitors' products of the same size and range.

Features

• 0.812 inch diameter legacy replacements
• Ranges of ±0.050 inch to ±10 inches
• 0.062 inch radial core-to-bore clearance
• Non-linearity less than ±0.25% of FRO
• 300°F (150°C) operating temperature
• Coil assembly sealed to IEC IP-61
• Magnetically shielded SS housing

Applications

• Machine Tools
• Materials Testing
• Industrial Robots
• Checkweigher Scales
• Packaging Machinery
• Valve Position Sensing
• Hydraulic Cylinder Position
• Automated Assembly Equipment

Brand Name: Macro Sensors
Made in: USA

Catalog Short Form:
application/pdf iconcatalog_shortform_08.pdf
Datasheet:
application/pdf iconprh_812_datasheet.pdf

Macro Sensors' PRH 812 Series of AC-LVDTs are 0.812 inch (20.6 mm) diameter general-purpose LVDT linear position sensors that feature larger core-to-bore clearance than the standard PR 750 Series of AC-LVDTs. They were designed primarily for use in legacy OEM applications, and are cost-effective exact replacement LVDTs that offer the same form, fit, and function as competitors' products of the same size and range.

Available in full scale measuring ranges of ±0.050 inch (±1.25 mm) to ±10 inches (±250 mm), PRH 812 LVDTs offer 0.062 inch (1.6 mm) radial core-to-bore clearance with the standard 0.25 inch (6.35 mm) diameter core supplied. They feature high resolution, excellent repeatability, and low hysteresis, as well as the highest sensitivity consistent with good linearity. The maximum linearity error of any of these sensors is ±0.25% of full range output (FRO), using a statistically best-fit straight line derived by the least squares method.

The proven reliability of PRH 812 Series LVDTs is a direct result of manufacturing processes and assembly techniques developed and optimized by Macro Sensors personnel over many years of making LVDTs. Their environmental robustness stems from the materials of their construction, such as glass-filled polymer coil forms for thermal stability and stainless steel housings that act as magnetic shields to reduce the effects of any external AC magnetic fields. Their sealing meets IEC standard IP-61.

Macro Sensors offers several options that permit a user or OEM to customize PRH 812 LVDTs or to match them to an existing application, including Teflon™ bore liners, metric threaded cores, smaller diameter cores for greater core-to-bore clearance and/or lower core mass, and construction for resistance to mild nuclear radiation. For OEMs, Macro Sensors can design and produce custom or private-labeled PRH 812 LVDTs, including units with different lead wire colors, exit points, configurations, or connectors, vented units for operation in pressurized fluids, and units for higher temperature operation. Contact the Applications Engineering group at Macro Sensors for help with any OEM or special LVDT requirements.

Features

• 0.812 inch diameter legacy replacements
• Ranges of ±0.050 inch to ±10 inches
• 0.062 inch radial core-to-bore clearance
• Non-linearity less than ±0.25% of FRO
• 300°F (150°C) operating temperature
• Coil assembly sealed to IEC IP-61
• Magnetically shielded SS housing

Applications

• Machine Tools
• Materials Testing
• Industrial Robots
• Checkweigher Scales
• Packaging Machinery
• Valve Position Sensing
• Hydraulic Cylinder Position
• Automated Assembly Equipment

GENERAL SPECIFICATIONS

Input Voltage
3.0 Vrms (nominal)
Input Frequency
2.5 - 3.3 kHz
Linearity Error
<±0.25% of FRO
Repeatability Error
<±0.01% of FSO
Hysteresis Error
<±0.01% of FSO
Operating Temperature
-65°F to +300°F
Operating Temperature
-55°C to +150°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

 

UNIT SPECIFICATIONS

PARAMETER
UNIT OF MEASURE
PRH 812
-050
PRH 812
-100
PRH 812
-200
PRH 812
-300
PRH 812
-500
PRH 812
-1000
PRH 812
-2000
PRH 812
-3000
PRH 812
-4000
PRH 812
-5000
PRH 812
-7500
PRH 
812
-10000
Nominal Range
Inches
±0.05
±0.10
±0.20
±0.30
±0.50
±1.00
±2.00
 ±3.00
±4.00
±5.00
±7.50
 ±10.00
Nominal Range
Millimeter
±1.25
±2.5
±5.0
±7.5
±12.5
±25
±50
 ±75
±100
±125
±190
 ±250
Sensitivity
mV/V/
.001 Inch
5.9
4.2
2.4
1.3
0.65
0.39
0.22
0.23
0.18
0.15
0.11
0.07
Sensitivity
mV/V/
Millimeter
230
165
95
51
26
15.3
8.6
9.1
7.1
5.9
4.3
2.8
Primary Impedance
Ohms
400
1070
1900
800
460
430
670
115
275
600
775
550
Dimension "A"
Inches
1.13
1.81
2.50
3.22
5.50
6.62
10.00
12.81
15.64
17.88
22.85
30.84
Dimension "A"
Millimeter
28.7
46.0
63.5
81.8
139.7
168.1
254.0
325.4
397.3
454.1
580.4
783.3
Dimension "B"
Inches
0.80
1.30
1.65
1.95
3.45
4.00
5.30
5.60
7.00
7.00
7.00
8.50
Dimension "B"
Millimeter
20.3
33.0
41.9
49.5
87.6
101.6
134.6
142.2
177.8
177.8
177.8
215.9
Dimension "N"
Inches
0.56
0.90
1.25
1.61
2.75
3.31
5.00
6.40
7.82
8.94
11.43
15.41
Dimension "N"
Millimeter
14.3
23.0
31.7
40.9
69.9
84.1
127.0
162.6
198.6
227.1
290.2
391.4
Weight, Body
Ounces
1.3
2.0
2.6
2.9
4.0
4.7
8.4
11.0
13.8
16.7
24.3
28.7
Weight, Body
Grams
37
57
74
82
114
131
238
312
392
474
690
814
Weight, Core
Ounces
0.14
0.22
0.30
0.38
0.67
0.75
1.00
1.06
1.51
1.51
1.51
1.78
Weight, Core
Grams
4.0
6.2
8.5
10.8
19.0
21.3
28.3
30.0
42.8
42.8
42.8
55.4
AC LVDT Position Sensor, 0.812" Diameter Replacement PRH-812 Series

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Harold G. Schaevitz Industries LLC

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