Sensors & Instrumentation - Linear Displacement - AC LVDT
This type of LVDT require AC drive electronics as provided amplifiers such as LVM110 .
AC LVDT have the advantage of lower cost,
flexible drive frequency and ability to synchronize several devices to reduce crosstalk.
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TE HR Series
MS HR Series general purpose LVDT for ±1.27mm to ±254mm (12 types).
Features
- Large core-to-bore ratio
- Calibration certificate with all units
- Optimal performance in most applications
Options
- High temperature and High Pressure vented case
- 5KHz excitation calibration testing
- Metric Core (no charge)
- Guided Core
- Small diameter, low mass core (MOQ required)
- Mild radiation resistance.
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TE MP Series
MS AC LVDT, MP Series for hostile industrial environments. 7 models from ±12.7mm to ±254mm.
Features
- Encapsulation to guard against harsh industrial conditions
- Calibration certificate with all units
- Screw terminal wiring for easy installation using standard electrical tools
- Compatible with all MS signal conditioners.
Options
- 5KHz excitation calibration testing
- Metric Core (no charge)
- Small diameter, low mass core.
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TE MHR series
The legendary MHR Series AC LVDT provides precision measurements in space restrictive applications.
With a diameter of just 3/8 inch [9.5mm] and an extremely lightweight core, the MHR Series is ideal for applications where excessive core weight could influence the motion of the measurand. With less inertia, accurate measurements at higher displacement speeds are easier to achieve. The lightweight core also reduces mechanical stresses and helps preserve the structural integrity of the core actuation assembly.
The high output sensitivity results from the close electrical coupling between the coil and core provides. MHR Series output signal interfaces with practically all signal conditioners and conditioning circuits. The magnetic stainless steel housing provides electromagnetic and electrostatic shielding.
Features
- Ideal for applications where installation space or weight is limited
- Lightweight core
- Calibration certificate supplied with all models
- Compatible with all MS signal conditioners
- High temperature (220°C) and high pressure (vented case) available – consult factory
Applications
- Sensitive, lightweight devices
Options
- Alternative 5.0 and 10.0 kHz excitation frequency testing
- Metric thread core
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TE HCA Series
A tough TIG welded case sealed for higher temperature and higher pressure applications.
The HCA and HCA-RA Series hermetically sealed LVDTs provide premium performance in harsh industrial environments. Impervious to dirt, water, steam, and corrosive liquids/vapors compatible with its materials, the HCA/HCA-RA all-welded stainless steel construction withstands external pressures up to 1,000 PSI [70 bars].
Double magnetic shielding offers excellent protection from external electromagnetic fields.
The HCA/HCA-RA Series can be configured with a number of standard options including but not limited to high temperature operation (+220ºC) and mild radiation resistance (1012 NVT total integrated flux; 107 rads Gamma). The HCA/HCA-RA is compatible with the full line of Measurement Specialties LVDT signal conditioners.
The HCA-RA version adds the convenience of a radial connector termination. This feature decreases the required installation space, while also allowing debris to harmlessly pass through the ‘open-ended’ bore.
Like in most of our LVDTs, the HCA/HCA-RA windings are vacuum impregnated with a specially formulated, high temperature, flexible resin, and the coil assembly is potted inside its housing with a two-component epoxy. This provides excellent protection against hostile environments such as high vibration and shock.
Captive core option: The HCA/HCA-RA features an optional captive core design that greatly simplifies installation. The core rod and bearing assembly includes a Bronze bearing on the front end for self-alignment, while a PTFE sleeve allows low-friction travel through the stainless steel boreliner (spool tube). The core rod and the bearing assembly are both field serviceable.
Also see our other hermetic LVDT models with built-in signal conditioning: HCD (DC voltage), HCT
Features
- Hermetically sealed welded housing suitable for hostile environments
- Connector termination
- Calibration certificate supplied with all models
- Compatible with MS signal conditioners
Options
- Guided Core
- mild radiation resistance
- high temperature operation (220°C)
- Low mass core
- Bendix PTO6A-10-6P
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TE E Series
Does exactly what an LVDT is designed to do at the lowest cost
The MS E Series, 6 models from ±2.54mm to ±50.8mm, satisfies numerous LVDT applications where economy, performance and reliability are desired.
Linearity is 0.5% of full-range for all units except long-stroke models. The E series is particularly suitable for moderate operating temperatures. Its rugged construction will resist the shocks and vibrations encountered in most industrial applications. The E series is housed in magnetic stainless steel for protection against electromagnetic and electrostatic interference.
Features
- Customary LVDT performance at minimal cost
- Magnetically shielded case
- Compatible with all MS signal conditioners.
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TE XS-B series
A small, precision LVDT with a host of applications
The MS XS–B miniature series, 2 models ±2.4mm and ±6.4mm, were designed for micro applications.
It is particularly well suited for multi-point measurement of small components. Core weight is negligible.
Manufacturing requires extremely sophisticated assembly techniques. Coils are wound from hair-thin wire. Leadwire bonding and other exacting operations are performed by highly skilled specialists with binocular microscopes. Housing provides magnetic shielding.
Applications ideas:
Servomechanisms, Robotics, Surfometers, Measurement of films/delicate materials, Space restrictive applications, Multi-point measurement of small components, Multi-finger calipers for pipe contour inspection, Measurements at high displacement speeds.
Features:
- 0.250” [6.35mm] max diameter
- Threaded mount version available (XS-BG)
- Lead-wires (XS-B) or cable (XS-BG)
- Axial and radial cable exit (XS-BG)
- Electromagnetic shielding
- Stainless steel housing
- 220ºC operation (Option; call factory)
- Calibration certificate supplied with all units
Specifications
- Input Voltage 1 V rms (maximum)
- Frequency Range 2.5 kHz to 20 kHz
- Operating Temperature (-55°C to 150°C)
- Null Voltage <1.0% full scale output
- Shock Survival 1,000 g for 11 msec
- Vibration Tolerance 20 g up to 2 kHz
- Coil Form Material Laminated glass epoxy
- Housing Material AISI 400 series magnetic stainless steel
- Lead Wires 36 AWG stranded copper, Teflon-insulated, (300 mm long nominal)
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TE XS-C series
A specialised LVDT designed for pressure vessels
The XS-C Series high pressure sealed LVDTs are the ideal solution for displacement measurement in pressure-sealed chambers, hydraulic actuators and pressure vessels. Constructed with heavy-wall 304 Series stainless steel, the all-welded XS-C is highly resistant to corrosive environments. It is suitable for operating pressures up to 3,000 PSI (proof pressures up to 4,500 PSI) and temperatures up to +300°F [+150°C]
Features:
- Sealed 304 Series stainless steel housing
- High pressure and temperature operation
- Bulkhead mount design
- 400Hz to 5KHz operating frequency range
- Shock and vibration tolerant
- Calibration certificate supplied with all units
3 models for ±6.35mm to ±25.4mm | Parameter | XS-C 249 | XS-C 499 | XS-C 999 |
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| Main body length “A” | 3.00 [76.2] | 4.65 [118.1] | 7.88 [200.2] | | Core length “B” | 1.80 [45.7] | 3.00 [76.2] | 3.80 [96.5] | | Core null position “C” | 1.39 [35.3] | 2.23 [56.6] | 3.25 [82.6] | | Body weight, oz [g] | 3.88 [110] | 4.62 [131] | 6.04 [171] | | Core weight, oz [g] | 0.12 [3.4] | 0.30 [8.5] | 0.37 [10.5] | |
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RDP AC LVDT Summary
This summary includes
RDP D5 and D6 series
RDP GT series Precision Gauging LVDT
RDP ACT series general purpose LVDT
RDP D5W series submersible LVDT
RDP ACW series submersible LVDT
RDP SSA series seawater submersible
The SSA series LVDTs are specially designed for use in sea water and heavy industrial environments with some corrosive chemicals. These LVDTs are made of welded 316 stainless steel and have a through bore plus very heavy construction. Therefore, the SS series LVDTs are capable of withstanding the most arduous industrial applications as well as 10 years seawater submersion at a depth of up to 2.3km. |
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