HLR-750 TE Macro Sensors AC LVDT

The HLR-750 Series AC LVDT position sensor from Macro Sensors, a TE Connectivity company, is engineered for precise, reliable linear position measurement in hazardous industrial environments. Designed specifically for applications where safety, durability, and performance are critical, this hermetically sealed LVDT delivers exceptional accuracy and long-term stability in gas turbines, petrochemical plants, and other demanding installations.

Built to meet stringent safety requirements, the HLR-750 is UL listed for Class I Division 2 non-incendive environments, making it an ideal solution for industries operating in explosive or hazardous atmospheres. With rugged stainless steel construction, wide operating temperature capability, and superior performance characteristics, this sensor provides dependable operation where conventional position sensors cannot.

Designed for Hazardous Location Applications

The HLR-750 LVDT is specifically designed for use in environments where flammable gases or vapors may be present. It is certified for:

• Class I, Division 2, Groups A, B, C, and D

• Class I, Zone 2, AEx nA IIC T3 environments

This makes it suitable for use in critical industries such as oil and gas, power generation, and chemical processing, where safety compliance is essential.

Its non-incendive design ensures that the sensor will not ignite surrounding gases under normal operating conditions, helping facilities maintain compliance with hazardous location standards while ensuring reliable position feedback.

High Accuracy and Repeatability

The HLR-750 Series is engineered to deliver precise and repeatable linear displacement measurements across a wide range of applications. Key performance specifications include:

• Linearity error of ±0.25% of full range output

• Repeatability better than 0.01% of full range

• Low hysteresis for consistent measurement performance

These characteristics ensure that the sensor provides highly accurate position feedback, even in applications requiring tight control tolerances.

Whether used for valve position monitoring or servo control systems, the HLR-750 delivers stable and dependable measurements over time.

Wide Measurement Ranges and Flexible Configurations

The HLR-750 Series is available in a variety of measurement ranges to suit different application requirements:

• ±1 inch to ±10 inches (±25 mm to ±250 mm)

This flexibility allows engineers to select the ideal sensor stroke length for their system without compromising performance.

Additionally, customizable options such as Teflon® bore liners and metric threaded cores allow further adaptation to specific environmental or mechanical needs.

Rugged Stainless Steel Construction

Designed for harsh industrial conditions, the HLR-750 features a fully stainless steel housing that provides excellent resistance to:

• Corrosion

• Dust and debris

• High vibration environments

• Mechanical shock

The sensor is capable of withstanding vibration levels up to 20 g (2 kHz) and shock events up to 1000 g, ensuring reliable performance in demanding mechanical systems.

This rugged construction makes it ideal for applications in heavy industrial environments where durability is essential.

Through-Bore Design for Easy Installation and Maintenance

A key feature of the HLR-750 is its through-bore design, which allows access to the core from either or both ends of the sensor. This design provides several important advantages:

• Improved core alignment and guidance

• Easier installation in complex mechanical assemblies

• Simplified cleaning in dusty or contaminated environments

This is particularly beneficial in applications such as turbine control systems or process plants where maintenance accessibility is critical.

Consistent Performance Across Industrial Temperature Ranges

The HLR-750 is designed to operate reliably across a wide industrial temperature range of -50°C to +150°C (-58°F to 300°F).

This operating range supports consistent performance in a variety of environments, from outdoor installations to elevated-temperature industrial processes.

With low temperature sensitivity, the sensor maintains stable output and minimizes measurement drift as ambient conditions change.

Electrical Performance and Compatibility

The HLR-750 operates using AC excitation, making it compatible with a wide range of LVDT signal conditioners and instrumentation systems. Key electrical characteristics include:

• Nominal input voltage: 3 Vrms

• Maximum input voltage: 6 Vrms

• Maximum excitation frequency: 2.5 kHz

These specifications allow the sensor to integrate easily into existing control systems while maintaining optimal performance when paired with appropriate signal conditioning electronics.

Macro Sensors also offers dedicated signal conditioners designed to maximize the performance of the HLR-750 series.

Typical Applications

The HLR-750 LVDT is widely used in industries that require reliable position feedback in hazardous or demanding environments. Common applications include:

• Gas turbine servo control systems

• Fuel valve position feedback

• Petrochemical processing equipment

• Pulp and paper mill machinery

These applications benefit from the sensor’s ability to deliver accurate, real-time position data while maintaining safe operation in potentially explosive environments.

Easy Integration into Industrial Systems

The HLR-750 features a 1/2-14 NPT conduit fitting for lead wire exit, allowing for secure connection to conduit systems or explosion-proof enclosures. This simplifies installation in industrial environments where cable protection and compliance are required.

The sensor’s compact 0.75-inch diameter body further enhances its ability to fit into tight spaces while maintaining robust performance.

Why Choose the HLR-750 LVDT?

The HLR-750 Series stands out as a premium solution for hazardous location position sensing due to its combination of:

• UL certification for hazardous environments

• High accuracy and repeatability

• Rugged, all-stainless steel construction

• Wide operating temperature range

• Flexible measurement ranges and configurations

• Reliable performance in high-vibration and high-shock environments

These features make it an ideal choice for engineers and system designers who require dependable linear position measurement in challenging industrial conditions.

Optimize Your System with Reliable Position Feedback

Accurate position measurement is critical for maintaining efficiency, safety, and performance in industrial systems. The HLR-750 AC LVDT position sensor delivers the precision and durability needed to operate confidently in hazardous environments.

Whether you are designing a new system or upgrading an existing installation, the HLR-750 provides the performance and reliability required for long-term success.