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L21SRIt serves as a direct indicator of the level in steam generator boilers or steady vessels for hot water, slightly aggressive liquids and saturated steam. It mustn't be used for toxic, aggressive and crystallizing substances.

Level indicator consists of upper and lower heads, measuring chamber with reflexive glass. Level indicator is standardly equipped with vent and drain plug, on request can be supplied with valve. The head consists of valve and safety ball cap. Drain plug (or valve) is used for venting and draining of level indicator during its shutdown. Used reflexive glass enable contrasting observations of the state level.


Attaching flanges spacing acc. to the request
Thermal properties and working conditions
Max. working temperature

For saturated superheated steam

300°C...for max. 300 hours
243°C...unprotected glass up to 35 bar
280° protected by mica up to 70 bar
120°C...for media with low degree of load up to 100 bar
Attachment with flange, thread (DN, PN or thread size acc. to the request)
Mounting position vertical
Material of parts in contact with medium DIN 1.4541, cast, toughened reflexive glass


StavoznakLevel indicator is connected via flanges or threaded connections in the vertical position from the side of the tank in which the level or the levels interface of measured liquid should be monitored. It works on the principle of communicating vessels. Level meter is used for direct monitoring of liquid level in pressure and non-pressure tanks. Measuring glass tube is protected by metal safety guard. Level meter must not be subjected to pressure surges, vibrations and shock.



Medium, density liquids, liquid interface
Max. measuring range -   in design glass + stainless steel 0,1 - 3 m
Max. pressure 1,6 MPa
Liquid temperature -30°C až +200°C
Attachment flanges  
DN 15 až DN 50   
Materials (of parts in contact with the liquid) glass, stainless steel, brass, rubber, teflon  
others on request
Mounting position vertical
EEx design yes
Use level measurement in pressure and non-pressure tanks and sumps


 Dear business partners, 

we would like to invite you to visit our stand at International Trade Fair for Process Automation HANNOVER MESSE in Germany. You are welcome to visit our exhibition from 23 - 27 April 2018, Hall 23 stand C32.  

More info:



SES Tlmače


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