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URS40SL_en.doc - rev. 0 

Oxygen detectors – URS40SL 

11/04/2011 

Gas detection systems for industrial environments 

2/4

 

Technical 
characteristics 

 

Type of sensor 

Electrochemical cell 

Detectable Gas 

O

2

excess O

2

 deficiency 

Power supply 

11÷14Vdc 

Max power consumption 

0,7W 

Measuring range  

0…30% O

2

 

Precision 

±

 5% full scale, 

±

 10% readout 

Repeatability 

±

 5% full scale, 

±

 10% readout 

Measurement resolution 

0.1% O

2

 

Microprocessor resolution 

1024 points (10 bit) 

Digital filter system 

Kalman Filter 

Watchdog Internal 
Warm-up time 

< 2m 

Stabilization time 

< 2m 

Response time 

< 20s (T50), < 60s (T90) 

Average Sensor life (in air)

 

120 weeks 

Threshold limit settings  
(default setting): 

Pre-alarm 

1

st

 threshold alarm 

2

nd

 threshold alarm 

 
 

22% O

2

 

23% O

2

 

24% O

2

 

 
 

19% O

2

 

17% O

2

 

15% O

2

 

 

 

 

Operating Temperature 
Storage Temperature

 

-20 

÷

 50 °C 

-20 

÷

 70 °C

 

Relative Humidity 

(without condensing)

Operation 

Storage

 

 

15 

÷

 90 %RH 

45 

÷

 75 %RH

 

Operating pressure (KPa) 

80 

÷

 110 

Air speed (m/s) 

 6 

Visual warnings 

Red LED visible with detector energized 

The steady LED status can be forced by 
the Control Unit to identify the sensor on 
the plant

 

Dimensions and weight 

See dedicated section 

 
Options & Accessories 

 

TUL40..

 Gas calibration kit 

See installation and commissioning chapter

TUS40   

Handheld terminal 

for service and maintenance  

See installation and commissioning chapter

CRG40

   Gas collecting cone 

See dedicated data sheet 

PAP40

   Powerful jets protection 

See dedicated data sheet 

 
 
EC Conformity 
 
EMC Directives / Standards 
 
 
LVD Directives / Standards 

 
 
 
 
Electromagnetic Compatibility Directive 
EMC 2004/108/EC, Standard EN50270 
 
Not applicable 

Sensors lifetime 

Sensor average lifetime (see technical characteristics) is referred to a typical usage 
in a pollution-free environment. Presence of a high concentration of pollutants can 
shorten the lifetime of the sensing element. 

Once the detection system starts up, it has to be supplied with energy during all the 
lifetime of its sensors. Seasonal use of the detection system is not recommended. 

Seasonal use of the detection system is not recommended. 

 

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