DrägerSensor CO – 68 09 605 - Pulse Instruments

DrägerSensor ® CO – 68 09 605
Data Sheet
This data sheet is a sensor specific supplement to the "Instructions for Use" of the respective transmitter. Please consult in any event the
"Instructions for Use" of the transmitter.
Intended Use
The DrägerSensor ® CO is an electrochemical three electrode sensor for the continuous real-time monitoring of carbon monoxide gas (CO) in
ambient air. The sensor is designed to be used only in conjunction with a Dräger transmitter (e. g. Polytron 2).
Technical Data
Electrode reactions Measuring electrode: CO + H 2 O ––> CO 2 + 2 H + + 2 e -
Counter electrode:
O 2 + 4 H + + 4 e - ––> 2 H 2 O
Measuring gas
Measuring range:
minimum
default
maximum
Calibration interval: *
minimum
default
maximum
Ambient conditions:
Operation
Storage (in original container)
Expected sensor life
Lower detection limit **
Linearity tolerance
Repeatability:
zero
sensitivity
Effect of temperature:
zero –40 °C to 40 °C (–40 °F to 105 °F)
40 °C to 65 °C (105 °F to 150 °F)
sensitivity –40 °C to 0 °C (–40 °F to 30 °F)
0 °C to 65 °C (30 °F to 150 °F)
Effect of pressure:
zero
sensitivity
Effect of humidity:
zero
sensitivity
Effect of flow between 0 and 6 m/s (0 and 1180 ft/min):
zero
sensitivity
Long-term drift:
zero
loss of sensitivity
Response time t 0...90 with dust filter **
Warm-up time:
Sensor ready for operation after ***
Sensor ready for calibration after ****
CO
0 to 50 ppm
0 to 300 ppm
0 to 1000 ppm
1 day
6 months
12 months
–40 °C to 65 °C (–40 °F to 150 °F)
700 hPa to 1300 hPa (20.7" Hg to 38.4" Hg at 32 °F)
5 % r.h. to 95 % r.h., non condensating
0 °C to 40 °C (30 °F to 105 °F)
> 36 months
5 ppm
≤ ± 3 % of measured value
≤ ± 2 ppm
≤ ± 1 % of measured value
≤ ± 0.1 ppm / K
≤ ± 0.5 ppm / K
≤ ± 1 % of measured value / K
≤ ± 0.4 % of measured value / K
no effect
≤ ± 0.05 % of measured value / hPa
no effect
≤ ± 0.02 % of measured value / % r.h.
no effect
≤ ± 3 % of measured value
≤ ± 1 ppm / month
≤ 3 % / year
≤ 30 seconds
≤ 30 minutes
≤ 10 hours
Cross Sensitivities
The table on the next page shows the response of the sensor to other gases than target gas (cross sensitivities). The values are typical and apply
to new sensors. The table does not claim to be complete. Gas mixtures can be displayed as the sum of all components. Gases with negative cross
sensitivities may displace a positive reading of the sensor.
The selective filter A2F is an accessory (see Order List). The sensor has to be recalibrated subsequently when a selective filter is used.
® DrägerSensor is a trademark of Dräger, registered in Germany.
* Only applicable when used in conjunction with Polytron 2 or Polytron 2 XP.
** At 25 °C (77 °F), 1013 hPa (29.2" Hg at 32 °F), 50 % r.h.
*** At this time, the actual zero point error of the sensor is less than 4 times the value stated in this data sheet.
**** At this time, the sensor has reached its specific accuracy.

Gas / Vapor Chemical Symbol Gas concentration Displayed value in ppm CO
with dust filter with selective filter A2F
Acetaldehyde CH 3 CHO 50 ppm ≤ 45 no effect
Acetone CH 3 COCH 3 1 000 ppm ≤ 20 no effect
Ammonia NH 3 60 ppm ≤ 1 no effect
Arsine AsH 3 5 ppm ≤ 20 no effect
Boron trifluoride BF 3 15 ppm ≤ 1 no effect
Butadiene CH 2 CHCHCH 2 50 ppm ≤ 130 no effect
Carbon dioxide CO 2 1.5 % by vol no effect no effect
Chlorine Cl 2 5 ppm ≤ 1 (–) * no effect
Diborane B 2 H 6 5 ppm ≤ 30 ≤ 30
Dichlormethane CH 2 Cl 2 1 000 ppm ≤ 1 no effect
Disilane Si 2 H 6 10 ppm ≤ 50 no effect
Ethane C 2 H 6 2 000 ppm ≤ 1 no effect
Ethanol C 2 H 5 OH 200 ppm ≤ 400 no effect
Ethene C 2 H 4 1 000 ppm ≤ 1300 ≤ 15
Ethine C 2 H 2 200 ppm ≤ 550 ≤ 40
Ethyl acetate CH 3 COOC 2 H 5 1 000 ppm ≤ 150 no effect
Ethylene oxide C 2 H 4 O 20 ppm ≤ 20 ≤ 2
Formaldehyde HCHO 20 ppm ≤ 30 no effect
Hydrogen H 2 1 000 ppm ≤ 90 ≤ 90
Hydrogen chloride HCl 40 ppm ≤ 5 no effect
Hydrogen cyanide HCN 25 ppm ≤ 30 no effect
Hydrogen fluoride HF 15 ppm ≤ 1 no effect
Hydrogen selenide SeH 2 5 ppm ≤ 12 no effect
Hydrogen sulfide H 2 S 20 ppm ≤ 90 no effect
Methane CH 4 2 % by vol ≤ 1 no effect
Methanol CH 3 OH 200 ppm ≤ 300 no effect
Methylmethacrylate CH 2 C(CH 3 )COOCH 3 60 ppm ≤ 60 no effect
Nitrogen dioxide NO 2 20 ppm ≤ 3 no effect
Nitrogen monoxide NO 20 ppm ≤ 30 no effect
Phosgene COCl 2 5 ppm ≤ 1 no effect
Phosphine PH 3 10 ppm ≤ 50 no effect
Propane C 3 H 8 1 % by vol ≤ 1 no effect
i-Propanol (CH 3 ) 2 CHOH 500 ppm ≤ 300 no effect
Silane SiH 4 5 ppm ≤ 20 no effect
Styrene C 6 H 5 CHCH 2 30 ppm ≤ 50 no effect
Sulfur dioxide SO 2 20 ppm ≤ 16 no effect
Tetrahydrofurane C 4 H 8 O 60 ppm ≤ 90 no effect
Tetrahydrothiophene C 4 H 8 S 10 ppm ≤ 10 no effect
Toluene C 6 H 5 CH 3 1 000 ppm ≤ 1 no effect
Vinyl chloride C 2 H 3 Cl 50 ppm ≤ 50 no effect
(–) * negative display.
Order List
DrägerSensor ® CO ............................................................. 68 09 605
Dustfilter ............................................................................. 68 09 595
Selective filter A2F .............................................................. 68 09 684
For calibration:
Calibration adapter .............................................................. 68 06 978
Remote calibration adapter .................................................. 68 07 955
Pressure reducer ................................................................ on request
Test gas cylinder 99.9 % N 2 (zero gas), 4 L, 200 bar .......... 68 05 113
Calibration bottle for calibration with ampoules .................... 68 03 407
Test gas ampoule 100 ppm CO .......................................... 68 07 920
Test gas ampoule 300 ppm CO .......................................... 68 07 921
67 mm (2.64")
Ø 27.6 mm (1.08")
Ø 50 mm (1.97")
00123456
Dräger Safety AG & Co. KGaA – < Revalstraße 1, D-23560 Lübeck, Germany – y +49 451 8 82 - 27 94 – FAX +49 451 8 82 - 49 91
! http://www.draeger.com/gds
5th edition - January 2002
Subject to alteration
90 23 454 - TD 4681.310 en/de
© Dräger Safety AG & Co. KGaA