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KLINGER level gauges, originally invented by Richard Klinger more than 130 years ago, still serve to reliably indicate the liquid level in boilers and vessels today.

An efficient process operation demands high-performance measurement installations. KLINGER fluid monitoring products stand out from the competition as a result of their excellent mechanical strength and outstanding durability versus alkaline and acid solutions as well as boiler water. Furthermore, continuous quality checks permanently ensure best-in-class measurement performance, long-term stability and the resource-conserving properties that have made this product range “trusted. worldwide.”

Liquid level gauges feature a reflex glass within the body. An observation slot on the other side allows for clear reading of non-hazardous liquids. With regard to applications that involve either hazardous or toxic liquids or gases, operators around the world rely on KLINGER magnetic level gauges.

Manometer cocks

Manometer cocks feature a simple and compact design (only one moving part) which guarantees high operation safety and long durability. These robust shut-off cocks are specifically designed to meet an operator’s high measurement engineering requirements. KLINGER manometer cocks stand out due to their reliability and efficiency.


  • 90° operation ensures immediate opening and closing procedure
  • Manual operation allows for throttling, thus enabling utilization in blow-down lines
  • No jamming as a result of corrosion

Transparent level gauges

In transparent level gauges the medium is contained within two glasses with smooth surfaces. The level of the medium level can easily be observed by looking through the glass. Thanks to resistance of the utilized materials, this level gauge is particularly suitable for use with aggressive media or steam. Protective mica shields can optionally be installed between the medium and the glass.

In order to improve visibility under special operating conditions, an illuminator can be mounted on one side of the transparent level gauge.

A105 and SS 316L are utilized as standard materials – alloy or other materials are available on demand.


  • Direct view of the fluid level
  • Direct vision through the glass (back illumination available)
  • Easy maintenance and very long service life
  • Suitable for steam media up to 120 bar and process media up to 250 bar

Reflex level gauges

Reflex level gauges allow the medium to be viewed through a reflex glass: The side of the glass exposed to the medium has a prismatic surface, while the other side is smooth. The medium level inside the level gauge is indicated by means of the light refraction principle, i.e. the liquid-filled area completely absorbs the rays of light and appears dark, while the rays of light are fully reflected in the gas / air-filled area, which subsequently appears bright.

Reflex level gauges offer great advantages in terms of low purchase and maintenance costs as well as with regard to easy level reading. However, they cannot be used in certain cases, for example when the separation level between two liquids has to be read, when discerning the liquid color is required or when high-pressure water steam has to be measured.

A105 and SS 316L are utilized as standard materials – alloy or other materials are available on demand.


  • Direct view of the fluid level
  • More economic solution for fluid level checking
  • Different refraction behavior with liquid and gas (or steam)
  • Easy maintenance and very long service life
  • Suitable for steam media up to 32 bar and process media up to 400 bar

Bi-color level gauges

Bi-color level gauges are primarily used to measure high-pressure water steam. These gauges feature two flat transparent glasses, which are mounted at an angle to each other. Together with the gauge body, they form the chamber containing the medium.

A special red and green illuminator, which serves to create a double lighting system, is mounted on the rear side of the gauge body. In this context, red is used for steam and green for the liquid.

As standard material A105 is utilized.


  • Direct view of the fluid level
  • Suitable for measuring high-pressure steam
  • Different colors for water (green) and steam (red). Back (black) illuminated.
  • Easy maintenance and very long service life
  • Suitable for steam media up to 225 bar

Magnetic level gauges

KLINGER® magnetic level gauges are particularly suitable for applications featuring toxic or hazardous liquids or gases or whenever an immediate and safe response to a level change is required. Magnetic level gauges provide perfect visibility and a continuous indication of the level of the medium. Readings can be taken either locally on a display or remotely. The simple concept of the magnetic level gauge allows for flexible design to adapt to a variety of installation requirements. They can be manufactured to an almost unlimited length and in any configuration.


  • 360-degree rotatable display
  • Alert functions
  • Maintenance-free
  • Compact design
  • Automatic float warning

Shut-off fittings

KLINGER offers a wide range of shut-off fittings in the form of gauge cocks and valves with an integral safety ball. The gauge cocks are soft seated and have a replaceable packing sleeve. The gauge valves, on the other hand, are metal seated valves that feature a rotatable union to gauge connection.


  • Approved for high-pressure steam
  • Double-lever fitting optional
  • Suitable for a wide range of applications

Steam applications

KLINGER offers a wide range of products for steam applications. Amongst others, KLINGER’s steam and vapor portfolio includes steam traps, flow indicators with integral flanges, as well as forged steel Y-strainers and cocks. Renowned for their quality, strength and design concept, these steam application products are the preferred choice of operators around the world.


  • Very good resistance versus high pressure
  • Crucial for flow control safety


KLINGER also provides a wide range of level gauge accessories to meet the specific demands of customers:

The range includes:

  • LED Illuminators
  • Anti-Frost blocks
  • Mica protective shields
  • Level gauge body heating systems
  • Graduated scales


  • Installable / mountable on all level gauges
  • Product customization
  • Compatible across multiple application fields

Wireless transmitters

Wireless technology in industrial applications allows for maximum flexibility in the installation of new measuring points, which can be seamless integrated into distributing control systems. The wireless solutions on offer include wireless field instruments, mobile computing devices, wireless networks, advanced applications and services, such as consulting, design, installation, commissioning and support.


  • Designed for applications with no access to power
  • Cost-effective process monitoring
  • For applications that require frequent changes in instrumentation schemes

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