The level is ascertained using a glass which has a smooth side and a wetted prismatic side. The level of the fluid inside the level gauge is shown by using the optical principles of refraction: the wetted part fully absorbs light and so the fluid appears to be black. The part in contact with the gas, on the other hand, fully reflects light and so the gas appears to be of a very light colour.
The product line includes level gauges suitable for pressure ratings from PN10 to PN250 and a huge number of industrial process applications.
This type of gauge is recommended:
Operating limits / Conditions:
For saturated steam values > 20 bar, a low-maintenance transparent level gauge with mica shield protection should be used (see graph "glass loss caused by boiler water" for the estimated glass life).
Not only does the glass life depend on the temperature, it depends on the pH of the water (the higher the value, the shorter the glass life).
The product is NOT suitable for use in the following instances:
In the scenarios listed above, the glass must be protected with MICA or PCTFE shields, so a transparent level gauge is necessary
Following articles list with related datasheets
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