LMK 387 H Stainless Steel Level Transmitter with HART Communication

Submersible stainless-steel level transmitter with HART

The LMK 387 H Stainless Steel Probe, designed for level and gauge measurement in wastewater, sludge, and water courses, boasts a robust construction with a flush ceramic diaphragm. This design facilitates easy cleaning and servicing. Its compact size, with a diameter of only 22 mm, allows for seamless installation in 1″ pipes and tight spaces. The probe is available in various versions, including an intrinsically safe model for zone 0 environments and a variant equipped with a temperature signal, ensuring accurate and reliable measurements in challenging conditions.

LMK 387 H Level Transmitter Product Parameters

  • Pressure Ranges: Nominal pressure gauge [bar]: 0.1 to 10, Level [mH2O]: 1 to 100.
  • Output Signal: Standard 2-wire: 4-20 mA, with options for HART® communication and Pt 100-temperature element.
  • Accuracy: Standard ± 0.35% FSO, options for higher precision.
  • Electrical Connections: Cable with sheath material TPE-U, various options available.
  • Process Connections: Compatible with various media, adaptable to different settings.
  • Media Compatibility: Suitable for use with non-aggressive liquids.
  • Special Features: Intrinsically safe version for zone 0, temperature signal option, IP68 rating, and compatibility with drinking water.

Product Highlights

The LMK387H Level Transmitter is a high-performance instrument designed for precise pressure measurement in various applications. It offers a wide nominal pressure range, starting from 0 to 1 mH2O and going up to 0 to 100 mH2O. The transmitter provides a 2-wire output signal of 4 to 20 mA, with the flexibility to accommodate other output signals upon request. Notably, it boasts several special characteristics, including a compact diameter of 22 mm, HART® communication (revision 7) for enhanced connectivity and control, and the ability to set offset, span, and damping parameters. 

The diaphragm is constructed from 99.9% Al2O3 ceramics, ensuring exceptional durability and longevity. The LMK387H Level Transmitter is particularly suitable for wastewater applications, thanks to its excellent long-term stability. It also offers optional versions with a titanium housing, making it resistant to harsh environments. Furthermore, it features an IS-version (Ex ia) that is intrinsically safe for use in gas and dust atmospheres. 

The transmitter holds a drinking water certificate compliant with DVGW and KTW regulations, ensuring its suitability for water-related applications. Additionally, it incorporates a Pt 100 temperature element and provides various options for elastomers, enabling customisation based on specific requirements. Overall, the LMK387H Level Transmitter combines robustness, versatility, and customisable features, making it a reliable choice for accurate pressure measurement across diverse industries.

Applications

The LMK 387 H Level Transmitter is widely used in water applications, such as groundwater and level monitoring. In these scenarios, the transmitter is designed to provide accurate and reliable measurements of water levels in wells, reservoirs, and open bodies of water. Its robust stainless steel construction and high precision make it ideal for continuous monitoring, ensuring that water resources are managed efficiently and that any changes in water levels are detected promptly for both environmental and operational needs.

Another important area for the LMK 387 H is sewage applications, including wastewater treatment and water recycling. In these environments, the transmitter is exposed to aggressive and contaminated media, so its durable design and resistance to corrosion are crucial. It helps operators monitor the levels in sewage tanks, treatment plants, and recycling systems, supporting the safe and effective processing of wastewater. This ensures compliance with environmental regulations and helps prevent overflows or system failures.

The transmitter is also suitable for fuel and oil applications, such as tank battery monitoring and use in biogas plants. In these settings, the LMK 387 H provides precise level measurement in tanks storing fuels, oils, or biogas, where safety and accuracy are paramount. Its compatibility with HART communication allows for integration into automated control systems, enabling real-time monitoring and management of valuable or hazardous liquids. This application is essential for maintaining operational safety, optimizing storage, and preventing leaks or spills.

To download the latest datasheet click here: LMK 387 H

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