EsiWelma Sensigas URS20SL Quick Start Manual

Use

Operation

Ordering

EsiWelma Srl
20/10/2010

Oxygen detectors

IP55 protection rating
11...28Vdc power supply.
Electrochemical cell sensor designed for the detection of oxygen (O
Up to three alarm thresholds plus sensing element fail.
LED on sensing element body to indicate operating status.
Automatic countdown of sensor life.
The URS20SL detectors are used to detect oxygen excess or deficiency in non-
classified areas.
An oxygen excess forms if it leaks in hospitals, laboratories, welding centres and,
more in general, where oxygen is stored.
Oxygen deficiency is an indirect measurement of the presence of other explosive or
gases that deplete the oxygen in the air.
asphyxiant
URS20SL sensors can be used in stand-alone mode with 4...20mA output or with an
optional voltage-free contact relay card having the following four digital outputs:
st
- Pre-alarm, 1 alarm threshold, 2
If there is an oxygen leak or an absence of oxygen, the detector compares the
measured concentration value with the threshold limit setpoints and energises the
associated relays. Information on the measured concentration value is always at the
4...20mA output.
To order, simply state the part number: URS20SL.
For special versions, on request, please contact Customer Service.
URS20SL_en.doc - rev. 0
Gas detection systems for industrial environments
nd
alarm threshold, sensor fail.
Oxygen detectors – URS20SL
URS20SL
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