High Pressure Reflex Liquid Level Gauge

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Reflex Liquid Level Gauges distinguish the liquid and steam level using the principles of refraction. The reflex glass used in the gauge features "V" shaped grooves which when in contact with the liquid or steam (air or gas) either reflect the visible light or absorb it. The light that enters through the glass is absorbed by the liquid and reflected by the steam (air or gas), which is due to the difference in refractive index of the two medias. The liquid filled portion of the glass will appear black, whilst the space occupied by the steam (air or gas) will appear a silvery-white colour. 

To size the appropriate Reflex Liquid Level Gauge for the specific application, refer to the Dimensions tab which illustrates the different size models that are available to suit type A glass.

Reflex level gauges can be used in a wide range of applications and offer great advantages to due their low inital and operating costs. Their are certain applications where this style of gauge is not suitable such as:

  • Applications where the interface or the separation between the liquid and gas media needs to be observed.
  • Applications where the colour of the liquid needs to be observed.
  • Applications where the media is corrosive or a solvent.

For these applications it is recommended to use a Transparent Level Gauge and in the case of the corrosive or solvent media a combination of a Transparent Level Gauge and a Mica Sheild to protect the glass.

The following diagrams illustrate the refractive principles upon which these Reflex Level Gauges operate.

How a relex level gauge works

Reflex Level Gauge Dimensions

Size C to C min. D V C
3 285 178 141 165
4 310 203 166 190
5 340 233 196 220
6 370 263 226 250
7 400 293 256 280
8 440 333 296 320
9 460 353 313 340

Reflex Level Gauge Construction

Number Description
1 Safety Clamps
2 Upper Gasket
3 Reflex Glass
4 Lower Gasket
5 Body
6 Cover Plate
7 Tightening Plate
8 Screw
9 Nipple

Size 3 to 9
Temperature 243°C
Body Galvanized Carbon Steel
Pressure Range 0 to 35 BAR
Application Water and Steam

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