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Level indicator-sensors RIS 121

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RIS 121 level indicator sensors are designed for continuous monitoring of the level of liquid and solid (bulk) media, as well as signaling the achievement of the maximum levels of the controlled medium at two specified points.

 

Sensors – indicators of the level of RIS 121 meet the requirements of the Rules of the Russian Maritime Register of Shipping and the Russian River Register, have versions for use at nuclear power facilities.

 

Sensors-indicators belong to the type of capacitive devices. The principle of operation is based on the dependence of the electrical capacitance of the sensor element on the level of the controlled environment.

The reduced error of level measurement by the primary converter, no more than
more than ± 1.5 % of the control range
Deviation of the response level from the nominal value
not more than ± 5
Versions of the sensitive elements of the primary converter
- non-insulated plate;
- non-insulated rod;
- rod insulated;
- cylindrical insulated;
- cylindrical non-insulated;
- cable insulated;
- non-insulated cable;
- insulated cable
The length of the submerged part of the sensor element
0,5…22 m
Operating temperature range of the controlled environment
from -100 to +200 °C
Operating pressure of the controlled medium, no more than
2.5 MPa
Ambient temperature
-20 to +70 °C
Explosion protection
- primary converters: «0 Ex ia IIC T6»;
- secondary converters: [Ex ia] IIC
PP output signal
- analog current 4 ... 20 mA
VP output signal
- DC power 4 ... 20 mA, 0...5 mA;
- relay;
- digital RS-485
Power supply parameters
- DC voltage: 24 V (in the range from 18 to 32 V);
- AC voltage: 220 V 50, 60 or 400 Hz
Power consumption
- primary converter: 0.7 W;
- secondary converter: 2.5 W
Degree of protection of the housing
- primary converters: IP67;
- secondary converters: IP54, IP67
Communication line length
no more than 300 m
Assigned service life
12 years without resource restriction

The sensors-indicators of the level of FIGURE 121 include primary and secondary converters. Depending on the design of the primary converter, the connection method, the operating temperature range, the maximum operating pressure, the length of the submerged part, the indicator sensors have different versions.