Tecfluid LP Series - GRM Válvulas e instrumentación
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Tecfluid LP Series

Spring level indicator for liquids


Tecfluid LP Series



  • Metallic construction, optional with plastic rod
  • Provides a reliable level measurement under extremeprocess conditions (very high temperatures, pressures and with corrosive fluids)
  • Indication by means of magnetic coupling
  • Scales in % or height
  • Liquid density: 0.6 … 2 kg/l
  • Measuring range: 300 mm to 6 m
  • Interface level measurement
  • Accuracy: ±5 mm of the measured value
  • Connections:
    • DN40 PN40 EN 1092-1 flanges. Other flange standards on request (ANSI, JIS)
    • Threaded connections BSP or NPT
    • Sanitary connections according to ISO 2852, SMS 1145, DIN 11851, TRI-CLAMP®
  • Materials:
    • Body: EN 1.4404 (AISI 316L), Hastelloy C, Titanium
    • Rod: EN 1.4404 (AISI 316L), PVC, PP, PVDF, Titanium, Hastelloy C
  • Local indication
  • Options:
    • 1 or 2 limit switches
    • Electronic transmitter with 4-20 mA analog output for safe or hazardous area (Ex ia IIC T4 or T6 protection, ATEX certified). HART protocol available on request
    • Side mounting with 80ME external chamber


Working principle

According to Archimedes principle of body submerged in a liquid. A rod with a density similar to the measured liquid is suspended by a spring to maintain an equilibrium with its weight. This rod is always submerged in the liquid (not floating on the surface) A variation in the liquid level (1) produces a change in the weight of the rod (partially submerged), which can be measured by the extension or compression of the spring that supports the rod (2). The variation in the length of the spring is transmitted to the indicating needle via a magnetic coupling (3). This measuring principle is well suited to dirty environments.

Tecfluid LP Series


  • Chemical and petrochemical, oil and gas industries
  • Steam and power industries and storage of chemicals
  • Food and beverage
  • Monitoring and control of common processes


  • LP80 flanged connection
  • LP81 threaded connection





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