General Purpose AC-Operated
LVDT Position Sensors
| Input Voltage | 3.0 Vrms (nominal) |
| Input Frequency | 2.5 to 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 +220 °F |
| -55 °C to +105 °C | |
| Thermal Coefficient of Sensitivity | -0.01%/°F (nominal) |
| -0.02%/°C (nominal) | |
| Vibration Tolerance | 20 g to 2 kHz |
| Shock Survival | 1000 g, 11 ms |
- Machine tools
- Materials testing
- Industrial robots
- Checkweigher scales
- Packaging machinery
- Valve position sensing
- Available in 0.750" or 0.812" diameters
- Ranges of ±0.05" to ±10" [±1.25 mm to ±250 mm]
- Non-linearity less than ±0.25%
- 220°F (105°C) operating temperature
- Coil assembly sealed to IEC IP-61
- Magnetically shielded SS housing
Macro Sensors’ PR 750 Series of 3/4" (19 mm) diameter AC-Operated LVDTs are general purpose contactless linear position sensors for both OEM applications and end user requirements. PR 812 and PRH 812 Series AC LVDTs are 0.812" (20.6 mm) diameter versions of the PR 750 Series and are designed primarily for use in legacy OEM applications and are not recommended for new designs. In most applications they are a cost effective form, fit, and function replacement LVDT for an OEM or user employing a competitor’s products of similar size and range.
PR 750, PR 812, and PRH 812 Series units are available in full scale measuring ranges from ±0.050" (±1.25 mm) to ±10" (±250 mm). PR 750 and PR 812 Series units offer a core-to-bore radial clearance of 0.031" (0.75 mm), while PRH 812 Series offer a core-to-bore radial clearance of 0.062" (1.6 mm), with the standard 0.25" (6.35 mm) diameter core supplied. PR 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 these sensors is ±0.25% of full range output, using a statistically best-fit straight line derived by the least squares method.
The proven reliability of PR 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 external sealing meets IEC standard IP-61.
Macro Sensors offers several options that permit a user to customize PR 750, PR 812, and PRH 812 LVDTs, including Teflon® bore liners, metric threaded cores, smaller diameter cores for greater core-to-bore clearance or lower core mass, and construction for resistance to mild nuclear radiation. In addition to these standard options, Macro Sensors can design and produce a variety of special PR Series LVDTs, including units with different lead wire colors, configurations, exit points, and connectors; vented units for operation in pressurized fluids; and units for higher ambient temperatures. Contact the highly experienced Applications Engineers at Macro Sensors for help with any special requirements.
All PR Series LVDTs will operate properly with any conventional differential input LVDT signal conditioners, but operation with ratiometric LVDT signal conditioning circuits is not recommended. Macro Sensors offers a full line of LVDT signal conditioners that will deliver optimum performance from any PR 750, PR 812, or PRH 812 Series LVDTs.
- PR 750 Series
- PR 812 Series
- PRH 812 Series
| Parameter | Unit of Measure | PR 750-050 | PR 750-100 | PR 750-200 | PR 750-500 | PR 750-1000 | PR 750-2000 | PR 750-3000 | PR 750-4000 | PR 750-5000 | PR 750-7500 | PR 750-10000 |
| Nominal Range | inches | ± 0.05 | ± 0.10 | ± 0.20 | ± 0.50 | ± 1.00 | ± 2.00 | ± 3.00 | ± 4.00 | ± 5.00 | ± 7.50 | ± 10.00 |
| mm | ± 1.25 | ± 2.5 | ± 5 | ± 12.5 | ± 25 | ± 50 | ± 75 | ± 100 | ± 125 | ± 190 | ± 250 | |
| Sensitivity | mV/V/.001 in | 6.5 | 4.0 | 2.4 | 0.65 | 0.65 | 0.39 | 0.26 | 0.18 | 0.13 | 0.12 | 0.08 |
| mV/V/mm | 255 | 155 | 95 | 25 | 25 | 15 | 10 | 7.1 | 5.1 | 4.3 | 3.1 | |
| Primary Impedance | ohms | 400 | 1000 | 1900 | 1400 | 1650 | 1875 | 1950 | 425 | 1050 | 1380 | 1050 |
| Dimension "A" | inches | 1.13 | 1.75 | 2.50 | 5.02 | 6.51 | 10.02 | 12.75 | 15.20 | 17.75 | 22.85 | 30.64 |
| mm | 28.7 | 44.5 | 63.5 | 127.5 | 165.4 | 254.5 | 323.9 | 386.1 | 450.9 | 580.4 | 778.3 | |
| 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 |
| mm | 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 | 0.56 | 0.88 | 1.25 | 2.51 | 3.25 | 5.01 | 6.38 | 7.60 | 8.88 | 11.43 | 15.32 |
| mm | 14.3 | 22.2 | 31.7 | 63.7 | 82.5 | 127.2 | 161.9 | 193.0 | 225.4 | 290.2 | 389.1 | |
| Weight - Body | ounces | 0.9 | 1.4 | 1.7 | 2.8 | 3.8 | 5.0 | 7.7 | 9.8 | 11.7 | 16.9 | 20.5 |
| grams | 26 | 40 | 48 | 80 | 108 | 142 | 218 | 278 | 332 | 480 | 582 | |
| Weight - Core | ounces | 0.14 | 0.22 | 0.30 | 0.72 | 0.72 | 1.20 | 1.34 | 1.34 | 1.34 | 1.51 | 2.20 |
| grams | 4.0 | 6.2 | 8.5 | 20.4 | 20.4 | 34.0 | 41.7 | 41.7 | 41.7 | 42.8 | 62.4 |
For standard PR 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 mild radiation resistant option, add -080 to model number with range.
For multiple options, add sum of dash numbers after model number with range.
For accessories, please visit the Accessories Page.
Macro Sensors also offers a full line of LVDT signal conditioners, controllers and indicators that deliver optimum performance from any AC operated LVDT. For additional information, please visit the Electronics/Signal Conditioning Page.
| Parameter | Unit of Measure | PR 812-050 | PR 812-100 | PR 812-200 | PR 812-500 | PR 812-1000 | PR 812-2000 | PR 812-3000 | PR 812-4000 | PR 812-5000 | PR 812-7500 | PR 812-10000 |
| Nominal Range | inches | ± 0.05 | ± 0.10 | ± 0.20 | ± 0.50 | ± 1.00 | ± 2.00 | ± 3.00 | ± 4.00 | ± 5.00 | ± 7.50 | ± 10.00 |
| mm | ± 1.25 | ± 2.5 | ± 5 | ± 12.5 | ± 25 | ± 50 | ± 75 | ± 100 | ± 125 | ± 190 | ± 250 | |
| Sensitivity | mV/V/.001 in | 6.5 | 4.0 | 2.4 | 0.65 | 0.65 | 0.39 | 0.26 | 0.18 | 0.13 | 0.12 | 0.08 |
| mV/V/mm | 255 | 155 | 95 | 25 | 25 | 15 | 10 | 7.1 | 5.1 | 4.3 | 3.1 | |
| Primary Impedance | ohms | 400 | 1000 | 1900 | 1400 | 1650 | 1875 | 1950 | 425 | 1050 | 1380 | 1050 |
| Dimension "A" | inches | 1.13 | 1.75 | 2.50 | 5.02 | 6.51 | 10.02 | 12.75 | 15.20 | 17.75 | 22.85 | 30.64 |
| mm | 28.7 | 44.5 | 63.5 | 127.5 | 165.4 | 254.5 | 323.9 | 386.1 | 450.9 | 580.4 | 778.3 | |
| 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 |
| mm | 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 | 0.56 | 0.88 | 1.25 | 2.51 | 3.25 | 5.01 | 6.38 | 7.60 | 8.88 | 11.43 | 15.32 |
| mm | 14.3 | 22.2 | 31.7 | 63.7 | 82.5 | 127.2 | 161.9 | 193.0 | 225.4 | 290.2 | 389.1 | |
| Weight - Body | ounces | 1.3 | 2.0 | 2.6 | 4.0 | 5.5 | 8.4 | 11.0 | 13.8 | 16.7 | 24.3 | 28.7 |
| grams | 37 | 57 | 74 | 114 | 156 | 238 | 312 | 392 | 474 | 690 | 814 | |
| Weight - Core | ounces | 0.14 | 0.22 | 0.30 | 0.72 | 0.72 | 1.20 | 1.34 | 1.34 | 1.34 | 1.51 | 2.20 |
| grams | 4.0 | 6.2 | 8.5 | 20.4 | 20.4 | 34.0 | 41.7 | 41.7 | 41.7 | 42.8 | 62.4 |
For standard PR 812, 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 mild radiation resistant option, add -080 to model number with range.
For multiple options, add sum of dash numbers after model number with range.
For accessories, please visit the Accessories Page.
Macro Sensors also offers a full line of LVDT signal conditioners, controllers and indicators that deliver optimum performance from any AC operated LVDT. For additional information, please visit the Electronics/Signal Conditioning Page.
| 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 |
| mm | ± 1.25 | ± 2.5 | ± 5 | ± 7.5 | ± 12.5 | ± 25 | ± 50 | ± 75 | ± 100 | ± 125 | ± 190 | ± 250 | |
| Sensitivity | mV/V/.001 in | 5.9 | 4.2 | 2.4 | 1.3 | 0.65 | 0.39 | 0.22 | 0.23 | 0.18 | 0.15 | 0.11 | 0.07 |
| mV/V/mm | 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 |
| mm | 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 |
| mm | 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 |
| mm | 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 |
| 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 | 2.20 |
| grams | 4.0 | 6.2 | 8.5 | 10.8 | 19.0 | 21.3 | 28.3 | 30.0 | 42.8 | 42.8 | 42.8 | 62.4 |
For standard PRH 812, 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 mild radiation resistant option, add -080 to model number with range.
For multiple options, add sum of dash numbers after model number with range.
For accessories, please visit the Accessories Page.
Macro Sensors also offers a full line of LVDT signal conditioners, controllers and indicators that deliver optimum performance from any AC operated LVDT. For additional information, please visit the Electronics/Signal Conditioning Page.
