CO-B4 Carbon Monoxide Sensor - AlphaSense

1 PERFORMANCES ensitivitynA/ppm at 2ppm CO420 to 650 Response timet90 (s) from zero to 10ppm CO< 25 Zero currentnA in zero air at 20 C +30 to -130 Noise* 2 standard deviations (ppb equivalent)4 Rangeppm limit of performance warranty1000 Linearityppb CO error at full scale, linear at zero, 500ppm CO20 to 35 Overgas limitmaximum ppm for stable response to gas pulse2000* Tested with AlphaSense ISB low noise circuitLIFETIMEZero driftppb equivalent change/year in lab air< 100 Sensitivity drift% change/year in lab air, monthly test< 10 Operating lifemonths until 50% original signal (24 month warranted)> 36 ENVIRONMENTALS ensitivity @ -20 C (% output @ -20 C/output @ 20 C) @ 5ppm CO40 to 70 Sensitivity @ 50 C (% output @ 50 C/output @ 20 C) @ 5ppm CO110 to 125 Zero @ -20 CnA-30 to +30 Zero @ 50 CnA-50 to -200 CROSS SENSITIVITYF ilter capacityppm hrsH2S250,000H2S sensitivity% measured gas @5ppmH2S< 1NO2sensitivity% measured gas @5ppmNO2< 1Cl2sensitivity% measured gas @5ppmCl2< 1NO sensitivity% measured gas @5ppmNO< -3SO2sensitivity% measured gas @5ppmSO2< measured gas @100ppmH2 at 20oC< 10C2H4sensitivity% measured gas @100ppmC2H4< 1NH3sensitivity% measured gas @20ppmNH3< range C-30 to 50 SPECIFICATIONSP ressure rangekPa80 to 120 Humidity range% rh continuous15 to 90 Storage periodmonths @ 3 to 20 C (stored in sealed pot)6 Load resistor (ISB circuit is recommended)

2 33 to 100 Weightg< 13CO-B4 Carbon MonoCO-B4 Carbon MonoCO-B4 Carbon MonoCO-B4 Carbon MonoCO-B4 Carbon Monoxide Sensorxide Sensorxide Sensorxide Sensorxide SensorFigure 1 CO-B4 Schematic DiagramPATENTEDNOTE: all sensors are tested at ambient environmental conditions, with 10 ohm load resistor, unless otherwise stated. As applications of use are outside our control, theinformation provided is given without legal responsibility. Customers should test under their own conditions, to ensure that the sensors are suitable for their Ltd, Sensor Technology House, 300 Avenue West, Skyline 120, Great Notley. CM77 7AA. UKTelephone: +44 (0) 1376 556 700 Fax: +44 (0) 1376 335 899 E-mail: Website: dimensions in millimetres ( ) Top View Bottom View Side ViewAt the end of the product s life, do not dispose of any electronic Sensor , component or instrument in the domestic waste, but contact theinstrument manufacturer, AlphaSense or its distributor for disposal instructions.

3 TTTTT ececececechnical Specifhnical Specifhnical Specifhnical Specifhnical Specificaicaicaicaicationtiontiontiontio n4-Electr4-Electr4-Electr4-Electr4-Elect rodeodeodeodeodeCO-B4 PCO-B4 PCO-B4 PCO-B4 PCO-B4 Perferferferferformance Daormance Daormance Daormance Daormance DatatatatataFigure 2 Sensitivity Temperature DependenceIn the interest of continued product improvement, we reserve the right to change design features and specifications without prior notification. The data contained in thisdocument is for guidance only. AlphaSense Ltd accepts no liability for any consequential losses, injury or damage resulting from the use of this document or the informationcontained within. ( AlphaSense LTD ) Doc. Ref. COB4/APR15 For further information on the performance of this Sensor , on other sensors in the range or any other subject, please contactAlphasense Ltd.

4 For Application Notes visit .Temperature (oC)% output (referenced to 20 oC)Figure 4 Response to 0 to 1ppm COFigure 3 Zero Current Temperature Dependence (corrected)Output (mV)Time (s)Temperature (oC)Zero current (nA) TTTTT ececececechnical Specifhnical Specifhnical Specifhnical Specifhnical Specificaicaicaicaicationtiontiontiontio n250300350400450500550600650700750800050 01000150020002500300035004000450050000 ppb40 ppb80 ppb100 ppb400 ppb700 ppb1 ppmFigure 2 shows thetemperature dependence ofsensitivity at 2ppm data is taken from atypical batch of 4 shows responsefrom 0 to 1ppm of AlphaSense ISB circuitreduces noise to 4ppb, withthe opportunity of digitalsmooting to reduce noiseeven further020406080100120140-30-20-10010203 04050-180-160-140-120-100-80-60-40-20020 -30-20-1001020304050 Figure 3 shows the variation inzero output of the workingelectrode caused by changesin temperature.

5 Expressed data is taken from atypical batch of AlphaSense for futherinformation on zero currentcorrection.