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PERFORMANCE Sensitivity nA/ppm in 10ppm NO2 -400 to -750Response time t90 (s) from zero to 10ppm NO2 (33 Load Resistor) < 50Zero current ppm equivalent in zero air < 0.4Resolution RMS noise (ppm equivalent) (33 Load Resistor) < 0.02Range ppm NO

2limit of performance warranty 20

Linearity ppm error at full scale, linear at zero and 10ppm NO2

< 1.5Overgas limit maximum ppm for stable response to gas pulse 100

LIFETIME Zero drift ppm equivalent change/year in lab air < 0.05Sensitivity drift % change/year in lab air, monthly test < 10Operating life months until 80% original signal (24 month warranted) > 24

ENVIRONMENTALSensitivity @ -20C% (output @ -20C/output @ 20C) @ 5ppm NO

273 to 94

Sensitivity @ 50C % (output @ 50C/output @ 20C) @ 5ppm NO2

95 to 110Zero @ -20C ppm equivalent change from 20C < 0.2Zero @ 50C ppm equivalent change from 20C < 0 to -0.5

CROSS H2S sensitivity % measured gas @ 20ppm H

2S < -40

SENSITIVITY Cl2

sensitivity % measured gas @ 10ppm Cl2

100NO sensitivity % measured gas @ 50ppm NO < 0.5SO

2sensitivity % measured gas @ 20ppm SO

2< -2.5

CO sensitivity % measured gas @ 400ppm CO < 0.1H

2sensitivity % measured gas @ 400ppm H

2< 0.1

C2H

4sensitivity % measured gas @ 50ppm C

2H

4< 0.1

NH3

sensitivity % measured gas @ 20ppm NH3

< 0.1CO2 sensitivity % measured gas @ 5% volume CO2

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80

85

90

95

100

105

110

-30 -20 -10 0 10 20 30 40 50

TTTTTe

c

e

c

e

c

e

c

e

chnic

alSpecif

hnic

alSpecif

hnic

alSpecif

hnic

alSpecif

hnic

alSpecifica

ica

ica

ica

ication

tion

tion

tion

tion

NO2-A1 PNO2-A1 PNO2-A1 PNO2-A1 PNO2-A1 Perferferferferformance Daormance Daormance Daormance Daormance Datatatatata

Figure 2 Sens i t i v i ty Temperat ure Dependence

Figure 3 Zero Temperatur e Dependence

Figure 2 shows the variation

in sensitivity caused bychanges in temperature.

For further information on the performance of this sensor, on other sensors in the range or any other subject, please contactAlphasense Ltd. For Application Notes visit www.alphasense.com.

%O

utput(referencedto20oC)

Output(nA)

Temperature (oC)

Time (seconds)

Temperature (oC)Zerooutput,referencedto20oC(equivalentppm)

Figure 4 Humid i ty p lus Temperatur e Trans ient Response

Figure 4 shows typical sensoroutputs for a group of sensorsexposed to exhaled breath for4 cycles over 240 seconds.

This is an extreme test forsuch sensors and the shift inthe base line of no more than0.5 ppm shows a very strongresistance to this test.

In 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

information contained within. (ALPHASENSE LTD ) Doc. Ref. NO2A1/JAN12

-0.7

-0.5

-0.3

-0.1

0.1

0.3

0.5

0 60 120 180 240

This data is taken from atypical batch of sensors.

This data is taken from atypical batch of sensors.

Figure 3 shows the variationin zero output caused bychanges in temperature,expressed as ppm gasequivalent, referenced to zeroat 20oC.

-0.5

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

-30 -20 -10 0 10 20 30 40 50