The LAS-19-R series AC-LVDT (Linear Variable Differential Transformer) linear position sensors by H.G. Schaevitz LLC dba Alliance Sensors Group are spring-loaded, hermetically-sealed, contactless devices with a radial connector, designed for industrial and commercial applications such as factory automation, metal and paper mills, valve position, various robotic assembly systems, pharmaceutical and food manufacturing, and outdoor or wet environment applications. This ruggedized linear device has excellent price-to-performance and stroke-to-length ratios, making LAS-19-R AC-LVDT sensors ideal for use in power generation and industrial automation equipment, and many OEM positioning applications.
LAS-19-R series AC-LVDTs are offered in 6 ranges from ±.050 to ±2.0 inches (±1.27 to ±50 mm) with excellent linearity and infinite resolution. LAS-19-R series AC-LVDTs operate from a nominal 3 Vrms, 2.5 – 3.3 kHz excitation source. They are packaged in a 0.750 inch (19.0 mm) OD hermetically-sealed, stainless steel housing with a ½-20 UNF mounting thread and two hex nuts, a 0.210 inch diameter (5.3 mm) probe with an AGD No 9 contact tip, and a radial PTO2-10-6P (6-pin) radial connector.
When mated with ASG’s industrial AC-LVDT DIN-rail-mountable signal conditioner, an LAS-19-R series AC-LVDT becomes part of a complete measurement solution, especially when space comes at a premium.
Our AC-LVDTs are also offered in larger body and longer range versions, including the LA-9.5, LA-19, LA-20.6, LA-21, LA-25, and LA-27.
For more information, see the technical datasheet below.
- - Spring-Loaded AC-LVDT
- - Hermetically-sealed 0.750 Inch OD Stainless Steel Housing
- - ½-20 UNF Mounting Threads with Locking Nuts
- - Radial PTO2-10-6P (6-pin) Connector for Through-bore Operation
| Available Ranges: | ±0.050, 0.125, 0.250, 0.500, 1.0, 2.0 inches |
| Excitation Frequency: | 2.5 to 3.3 kHz |
| Excitation Voltage: | 3.0 V ACrms (nominal) |
| Linearity Error : | ≤±0.25% of FSO (typical 0.15%) |
| Null Voltage: | ≤0.05% of FSO |
| Operating Temperature: | -65 to 220°F (-55 to 125 C ) |
| Temperature Coefficient: | <-0.02% FSO/K |
| Humidity: | 95% RH, non-condensing |
| Shock: | 1000 g, 11 msec. |
| Vibration: | 5 - 20 Hz, 0.5 inch p-p; 20 - 2000 Hz, 10g p-p |
If you are looking for CAD drawings of our LAS-19-R sensor, simply call us at 856-727-0250 or use the online contact us form by clicking here.
Why Remote Electronics Configuration Transforms Complex Position Sensing Applications
The LAS-19-R Series spring-loaded AC-LVDT position sensor solves installation challenges that standard integrated sensors cannot address. By separating the sensor coil assembly from signal conditioning electronics, this design enables precise measurements in confined spaces, high-temperature zones, and electromagnetically noisy environments. Engineers facing difficult installation constraints find the remote electronics architecture provides flexibility without compromising measurement performance.
Traditional spring-loaded sensors combine all components in a single housing, limiting installation options. The LAS-19-R's modular approach places only the essential sensing elements at the measurement point, while electronics mount in more favorable locations. This separation strategy reduces heat exposure, simplifies maintenance access, and enables measurements previously considered impossible.
Advantages of Remote Electronics Architecture
Understanding when remote electronics provide superior solutions requires examining specific application challenges. In high-temperature environments, electronic components suffer reliability degradation above 185°F. The LAS-19-R's coil assembly withstands temperatures exceeding 400°F while electronics remain in controlled environments, ensuring long-term stability and life.
Space constraints represent another compelling reason for remote electronics. Machine designers increasingly demand compact equipment footprints, leaving minimal room for sensors. The LAS-19-R's miniature coil assembly fits where integrated sensors cannot, enabling measurements in previously inaccessible locations.
Electromagnetic Interference Mitigation Strategies
Industrial environments generate significant electromagnetic noise from motors, welders, and power switching equipment. Standard sensors struggle with signal integrity when mounted near these interference sources. The LAS-19-R's design allows electronics placement in shielded enclosures away from noise sources, dramatically improving signal quality.
Cable Length Considerations and Signal Integrity
Remote mounting raises questions about maximum cable distances between components. The LAS-19-R accommodates cable runs up to 100 feet without signal degradation when proper cable types are specified. The implementation of low-capacitance shielded cables maintain signal integrity while twisted-pair configurations reject common-mode noise.
Application-Specific Solutions for Demanding Industries
Different industries leverage the LAS-19-R's unique capabilities to solve measurement challenges. In plastic injection molding, mold temperatures exceed electronic component ratings. The remote configuration places coil assemblies inside heated molds while electronics remain in temperature-controlled panels, enabling precise cavity dimension monitoring during production cycles.
Steel processing facilities face extreme temperature and contamination challenges. The LAS-19-R measures roll gap positions with sensing elements exposed to 300°F ambient temperatures and mill scale contamination. Electronics mounted in clean, air-conditioned control rooms maintain calibration stability despite harsh field conditions.
Installation Best Practices for Optimal Performance
Remote electronics installations require attention to system-level details. Proper grounding becomes critical with separated components. Single-point grounding strategies prevent ground loops that introduce measurement errors. Shield termination at one end only prevents shield currents that corrupt signals.
Mechanical mounting deserves equal attention. Coil assemblies require rigid support to maintain alignment with measured surfaces. Thermal expansion considerations prevent binding in high-temperature applications. Spring force selection ensures consistent surface contact without excessive wear on softer materials.
Wiring and Interconnection Guidelines
Cable routing significantly impacts system reliability. Separating sensor cables from power wiring prevents induced noise. Conduit or cable trays provide mechanical protection while maintaining required separation distances. Service loops near connections prevent strain-induced failures from thermal cycling or vibration.
Connector selection proves equally important. High-temperature applications require specialized connectors rated for environmental conditions. Hermetic seals prevent moisture ingress that causes signal degradation. Regular connector inspection identifies corrosion before signal problems develop.
Maintenance Strategies for Extended Service Life
The LAS-19-R's design simplifies maintenance procedures. Coil assemblies can be replaced without disturbing electronics calibration, minimizing downtime. Electronic modules swap quickly for repair without accessing hazardous measurement locations.
Predictive maintenance techniques identify developing problems before failures occur. Monitoring signal stability trends reveals gradual degradation from contamination or wear. Scheduled coil assembly replacement during planned maintenance prevents unexpected production interruptions.
Calibration Procedures for Remote Electronics
Remote electronics configurations require modified calibration approaches. End-to-end system calibration accounts for cable effects and ensures accurate measurements.
Documentation becomes critical with remote electronics applications. Recording cable types, lengths, and routing simplifies troubleshooting. Maintaining calibration records for each subsystem enables targeted maintenance when performance degrades.
Real-World Performance in Challenging Applications
Field experience validates the LAS-19-R's advantages in difficult installations. Semiconductor equipment manufacturers report successful operation in vacuum chambers where integrated electronics would fail. Food processing facilities achieve reliable measurements in washdown areas by protecting electronics while exposing only sealed coil assemblies to cleaning chemicals and heat.
The LAS-19-R Series represents an elegant solution to complex position sensing challenges. Its remote electronics provides installation flexibility by leveraging the accuracy and reliability of AC-LVDT technology. Engineers facing space constraints, temperature extremes, or electromagnetic interference consistently choose the LAS-19-R Series, knowing its modular design enables measurements where integrated sensors cannot survive.
Download AC-LVDT Position Sensor LAS-19-R Datasheet
