Reflex Gauge Glass Types A & B

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Reflex glass for level gauges have proved themselves universally where visual process control is essential. A high safety level is secured through the use of borosilicate glass, which has a high chemical resistance and a low thermal expansion. The borosilicate glass is thermal pressured (tempered) so that it can resist to the high pressure and temperature. Reflex glass features a set of V-shaped refractive grooves which when in contact with the liquid and steam in the level gauge work to show the liquid level. 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. 

Size Number Length Width Type A Width Type B Thickness
0 95mm 30mm 34mm 17mm
1 115mm 30mm 34mm 17mm
2 140mm 30mm 34mm 17mm
3 165mm 30mm 34mm 17mm
4 190mm 30mm 34mm 17mm
5 220mm 30mm 34mm 17mm
6 250mm 30mm 34mm 17mm
7 280mm 30mm 34mm 17mm
8 320mm 30mm 34mm 17mm
9 340mm 30mm 34mm 17mm

Widths 30mm & 34mm
Wall Thickness 17mm
Length Sizes 1 to 9
Types A and B

  1. What is Reflex Gauge Glass, and what are its primary applications in industrial processes?

    • Reflex Gauge Glass is a transparent sight glass with one or more grooves on its side that allow for visual level measurement of liquids in tanks or vessels. It is primarily used in industrial applications to monitor and control liquid levels in boilers, tanks, and other vessels where accurate level measurement is crucial.
  2. What are the key differences between Reflex Gauge Glass Types A and B, and how do I choose the right type for my application?

    • Reflex Gauge Glass Type A has a single continuous groove, while Type B has multiple intermittent grooves. The choice between them depends on your specific application requirements and preferences. Type A provides continuous level indication, whereas Type B offers discrete level measurements.
  3. How does Reflex Gauge Glass work to measure liquid levels in vessels and tanks?

    • Reflex Gauge Glass uses the principle of total internal reflection. When liquid is present above the grooves in the glass, it refracts light, making the liquid level visible. The absence of liquid results in a clear glass section, indicating an empty space.
  4. What are the advantages of using Reflex Gauge Glass over other level measurement methods, such as sight glasses or magnetic level indicators?

    • Reflex Gauge Glasses provide direct and continuous visual indication of liquid levels without the need for additional instruments or power sources. They are durable, easy to install, and suitable for a wide range of process fluids.
  5. Are Reflex Gauge Glasses suitable for use with various types of liquids, including corrosive or high-temperature substances?

    • Reflex Gauge Glasses are available in different materials to suit various process conditions. They can be selected to be compatible with corrosive, high-temperature, or aggressive liquids, provided the appropriate material is chosen.
  6. What are the typical sizes and dimensions available for Reflex Gauge Glasses, and how do I select the appropriate size for my vessel?

    • Reflex Gauge Glasses come in various lengths and widths. The choice of size depends on the vessel's dimensions, required measurement range, and specific installation requirements. Consult with the manufacturer or supplier for guidance.
  7. Can Reflex Gauge Glasses be used for both low and high-pressure applications, and what are their pressure and temperature limitations?

    • Reflex Gauge Glasses are suitable for a wide range of pressure and temperature conditions, depending on the selected material and design. They are often used in both low and high-pressure systems, but it's crucial to choose the right material and construction for your specific application.
  8. Are there any safety precautions or guidelines to follow when installing and maintaining Reflex Gauge Glasses in industrial processes?

    • Yes, safety precautions should be observed when handling, installing, and maintaining Reflex Gauge Glasses. Proper training and adherence to safety standards are essential to ensure safe and reliable operation.
  9. What is the expected lifespan of Reflex Gauge Glasses, and how often should they be replaced or inspected for wear and damage?

    • The lifespan of Reflex Level Gauge Glasses can vary depending on usage and operating conditions. Regular inspection for wear, damage, and discoloration is recommended, and they should be replaced if any issues are detected.
  10. How do I clean and maintain Reflex Gauge Glasses to ensure accurate and reliable level measurements?

    • Cleaning and maintenance typically involve using soft, non-abrasive materials and compatible cleaning solutions to remove deposits or contaminants from the glass surface. Regular inspection and cleaning help ensure clear and accurate level readings. Follow manufacturer guidelines for proper maintenance procedures.