Navim Group Company Sensigas URS21 S Series Manual

Use
Operation
Ordering
Modelli disponibili
Code : * UR xx yy z S **
* Prefix to the name of the Detector: DR = Display with Relays; DN = Display without Relays;
** Suffix to the name of the Detector: EXR = Extended temperature range (Not Available for Oxygen)
27/04/2021
Sensigas
Oxygen detectors
ATEX II 3G Ex nA nC d IIC T6 Gb certified
MED/3.54 (IEC 60092-504) certified
Power supply 10÷28Vdc.
Electrochemical cell sensor, specifically designed for the detection of Oxygen (O
Up to three intervention thresholds.
Automatic counting of the lifetime of the sensors.
LED on the sensor body to indicate the operating status and display option.
URS21.S are used to detect the Oxygen excess or deficiency in in Zone 2 ATEX classified areas.
An Oxygen excess forms if it leaks in hospitals, laboratories, welding centers and, more in
general, where Oxygen is stored or employed.
Oxygen deficiency is an indirect measurement of the presence of other explosive or asphyxiant
gases that deplete the oxygen in the air.
URS21.S sensors are used in stand-alone mode with 4...20mA output and, as option, with n. 4
voltage-free contact relay outputs, as follows:
- Pre-alarm, 1st alarm threshold, 2nd alarm threshold, sensor fail.
In case of Oxygen leakage or absence the sensor compares the measured concentration value
with the intervention thresholds set by activating the relays outputs associated with them. The
information of the measured concentration value is always present on the 4 ÷ 20mA output
Simply indicate product code: please, refer to "available models".
S = Not-Sparkling Execution
Sensing Element type:
S = Standard (2 terminals); P= Professional (3 terminals)
"21" for Stand Alone detectors with 4...20 mA output
"41" for Bus Based System EW40
S = Oxygen
EW146.6A3_en - rev. B
Gas detection systems for ind. environments
®
URS21.S
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Oxygen detectors – URS21.S
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