EsiWelma Srl
URD40SE - EW0526D1_en.docx
CO
2
gas detectors – URD40SE
16/06/2017
Gas detection systems for industrial environments
2/4
Technical
characteristics
Type of sensor
NDIR (Non Dispersive Infrared)
Detectable Gas
Carbon dioxide (CO
2
)
Power supply
11÷14Vdc
Max power consumption
1,6W
Measuring range
0...20,000 ppm
Precision
5% full scale,
10% readout
Repeatability
5% full scale,
10% readout
Measurement resolution
20 ppm
Microprocessor resolution
1024 points (10 bit)
Digital filter system
Kalman Filter
Watchdog
Internal
Warm-up time
< 2m
Stabilization time
< 2m
Response time
< 25s (T90)
Average Sensor life (in air)
255 weeks
Threshold limit settings
(default setting):
Pre-alarm
1
st
threshold alarm
2
nd
threshold alarm
2000 ppm
4000 ppm
8000 ppm
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
ATEX markings
1370
II 2G Ex d IIC T6
BVI 07 ATEX 0032
-20°C
T
A
+50°C
Key to marking
information
Marking in conformity with all applicable EC Directives
1370
Identification number of Notified Body involved in production control
CE marking for all equipment in conformity with Directive ATEX 2014/34/EC
II
Equipment group for surface industry
2
Equipment category 2 for use in Zone 1
G
Equipment intended for use in explosive gas atmosphere, caused by mixture of air
and gas, vapours, flammable mist
Ex d IIC T6
Type of protection complying with EN60079-0 and EN60079-1
BVI 07 ATEX 0032 EC-type examination certificate
-20°C
TA
+50°C Operating temperature range
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.
