SKU NA-LGG Category

Sight glass indicator type LGG

Direct level indicator without auxiliary power – robust and versatile

Data sheet

Product information

The LGG sight glass indicator from WIKA enables direct and continuous level indication without auxiliary power. Thanks to its robust design and corrosion-resistant materials, it is ideal for use in tanks, boilers and process plants under extreme conditions such as high temperatures and pressures.

Special features

  • Direct level indicator without power supply
  • Reflective, transparent or refractive lenses according to DIN 7081
  • Robust construction for a long service life
  • Large selection of process connections (flange, thread, welding socket)
  • Optional: lighting, heating, insulation
  • Explosion-proof versions available

Advantages

  • Energy-independent: Display is purely mechanical
  • High level of safety: self-closing ball prevents leaks in the event of glass breakage
  • Flexible: variants for standard, high-pressure and weld-in versions
  • Reliable: Suitable for aggressive media and high temperatures
  • Individual: Special versions available for special applications

Variants

  • LGG-RP / LGG-TP: Carbon-Line reflex or transparent version
  • LGG-RE / LGG-TE: Standard version (up to 160 bar)
  • LGG-RI / LGG-TI: High-pressure version (up to 250 bar)
  • LGG-WR / LGG-WT: Weld-in version
  • LGG-GA / LGG-GB: Glass tube version for standard and long lengths
  • LGG-M: Refraction version for maximum pressure up to 374 °C

Areas of application

  • Tank construction and boiler systems
  • Chemical and petrochemical industry
  • Oil and gas industry
  • Energy plants and power stations
  • Heat transfer and refrigerant systems
  • Cryogenic technology
CharacteristicValue
Operating temperature-196 to +374 °C
Operating pressureVacuum up to 250 bar
MaterialsSteel, stainless steel, special materials
DisplayReflective, transparent, refraction glass
optionsLighting, heating, insulation
ApprovalsCE, ATEX, IECEx

Level indicators in tank construction – precision and safety for your processes

Level indicators are indispensable components in tank construction and process technology, as they enable continuous and reliable level control. They are used in storage tanks, pressure vessels, reactors and mixing vessels and ensure process safety by preventing overfilling or dry running.

Thanks to their robust design and the possibility of customization – for example with special connections, heating jackets or ATEX-compliant versions – our level indicators can be perfectly integrated into your system. They are suitable for aggressive media, high temperatures and pressures and can also be used in hygienic applications such as the food and pharmaceutical industries.

We not only offer standard solutions, but also customized versions that are precisely tailored to your requirements. This gives you a product that combines functionality, safety and durability – ideal for use in chemical, energy, water and food technology.

Armaturenfabrik Tank construction made of stable and stainless steel, level indicators Bypass level indicators Pressure vessels Oil, liquids, gases, float valves

FAQs

Does the LGG require a power supply?

No, the display is purely mechanical via sight glasses.

Reflective, transparent and refractive lenses according to DIN 7081.

Yes, variants up to 250 bar are available.

Yes, special connections, heating jackets and mica templates are possible.

Tank construction, chemicals, energy, oil & gas, food industry.

Insulation – In combination with fittings and containers

Our insulations are more than just accessories – they perfectly complement fittings and systems and increase efficiency, safety and adaptability.
Order and configure now.

We offer:

  • Custom-made insulating pads to fit your fitting
  • Heating jacket integration – reliable even under extreme conditions
  • Insulation jackets and pipe insulation for SKID assemblies – ideal for modular systems and complex systems
  • Special solutions for high temperatures – for power plants, the chemical and process industries
Armaturenfabrik Valve insulation High-temperature pipe insulation with IFS-Plast25 insulation pads and IFS-MW20 mineral wool for SKID systems, process plants

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