Macro Sensors LVDTs: PR-812 Series General Purpose AC-LVDT Position Sensors

Description

Macro Sensors’ PR 812 Series of AC LVDTs are 0.812 inch (20.6 mm) diameter versions of the PR 750 Series of general purpose LVDT linear position sensors. They were 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.

Available in the same full scale measuring ranges as the PR 750 Series, ±0.050 inch (±1.25 mm) to ±10 inches (±250 mm), PR 812 LVDTs also offer 0.031 inch (0.75 mm) core-to-bore radial clearance with the standard 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, 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 standard options that permit a user or OEM to customize PR 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. For OEMs Macro Sensors can design and produce special PR 812 LVDTs, including units with different lead wire colors, exit points, configurations, or connectors, and units for higher temperature operation. Contact the Applications Engineers at Macro Sensors for help with any OEM special requirements.

All PR 812 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 signal conditioners for OEMs that can deliver optimum performance from any PR 812 Series LVDTs. Details can be found in series 9000 technical bulletins.


click the image for an enlarged view General Specifications Unit Specifications Mechanical Drawing & Wiring Diagram Support Electronics Options Ordering Information Tech Bulletin	Description Macro Sensors’ PR 812 Series of AC LVDTs are 0.812 inch (20.6 mm) diameter versions of the PR 750 Series of general purpose LVDT linear position sensors. They were 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. Available in the same full scale measuring ranges as the PR 750 Series, ±0.050 inch (±1.25 mm) to ±10 inches (±250 mm), PR 812 LVDTs also offer 0.031 inch (0.75 mm) core-to-bore radial clearance with the standard 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, 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 standard options that permit a user or OEM to customize PR 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. For OEMs Macro Sensors can design and produce special PR 812 LVDTs, including units with different lead wire colors, exit points, configurations, or connectors, and units for higher temperature operation. Contact the Applications Engineers at Macro Sensors for help with any OEM special requirements. All PR 812 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 signal conditioners for OEMs that can deliver optimum performance from any PR 812 Series LVDTs. Details can be found in series 9000 technical bulletins.	Features 0.812 inch diameter replacement units Ranges of ±0.050 inch to ±10 inches Non-linearity less than ±0.25% of FRO 220°F (105°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