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LMK 387 H Stainless Steel Level Transmitter with HART Communication

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.


  • Water
    • Groundwater and level monitoring
  • Sewage
    • Wastewater treatment
    • Water recycling
  • Fuel and Oil
    • Tank battery
    • Biogas plants

To download the latest datasheet click here: LMK 387 H

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