Name: OX-A431 Ozone + Nitrogen Dioxide Sensor (O3 + NO2 Sensor) 4-Electrode
Brand: Alphasense
Availability: InStock

Product Details

OX-A431 Oxidising Gas Sensor
Ozone + Nitrogen Dioxide
4-Electrode

Ozone (O3) Sensor Specification

Ozone Sensor PERFORMANCE
Sensitivity	nA/ppm at 1ppm O3	-200 to -550
Response time	t90 (s) from zero to 1ppm O3	<45
Zero current	nA in zero air at 20℃	-50 to 70
Noise*	±2 standard deviations (ppb equivalent)	15
Range	ppm O3 limit of performance warranty	20
Linearity	ppm error at full scale, linear at zero and 20ppm O3	<±0.5
Overgas limit	maximum ppm for stable response to gas pulse	50
* Tested with Alphasense AFE low noise circuit

Ozone Sensor LIFETIME
Zero drift	ppb equivalent change/year in lab air	0 to 20
Sensitivity drift	% change/year in lab air, monthly test	<-20 to -40
Operating life	months until 50% original signal (24 month warranted)	> 24

Ozone Sensor ENVIRONMENTAL
Sensitivity @ -20℃	(% output @ -20℃/output @ 20℃) @ 2ppm O3	60 to 80
Sensitivity @ 40℃	(% output @ 40℃/output @ 20℃) @ 2ppm O3	80 to 105
Zero @ -20℃	nA	0 to 25
Zero @ 40℃	nA	20 to 90

Ozone Sensor CROSS SENSITIVITY
H2S	sensitivity % measured gas @ 5ppm H2S	<100
NO	sensitivity % measured gas @ 5ppm NO	<5
Cl2	sensitivity % measured gas @ 5ppm Cl2	<85
SO2	sensitivity % measured gas @ 5ppm SO2	<-6
CO	sensitivity % measured gas @ 5ppm CO	<0.1
C2H4	sensitivity % measured gas @ 100ppm C2H4	<0.1
NH3	sensitivity % measured gas @ 20ppm NH3	<0.1
H2	sensitivity % measured gas @ 100ppm H2	<0.1
CO2	sensitivity % measured gas @ 5% Vol CO2	0.1
Halothane	sensitivity % measured gas @ 100ppm Halothane	<0.1

Ozone Sensor KEY SPECIFICATIONS
Temperature range	℃	-30 to 40
Pressure range	kPa	80 to 120
Humidity range	% rh continuous	15 to 85
Storage period	months @ 3 to 20℃(stored in sealed pot)	6
Load resistor	Ω (AFE circuit recommended)	33 to 100
Weight	g	<6

Nitrogen Dioxide (NO2) Sensor Specification

NO2 Sensor PERFORMANCE
Sensitivity to NO2	nA/ppm at 2ppm NO2	-200 to -550
Response time	t90 (s) from zero to 1ppm NO2	<45
Zero current	nA in zero air at 20℃	-50 to 70
Noise*	±2 standard deviations (ppb equivalent)	15
Range	ppm NO2 limit of performance warranty	20
Linearity	ppm error at full scale, linear at zero and 20ppm NO2	<±0.5
Overgas limit	maximum ppm for stable response to gas pulse	50
* Tested with Alphasense AFE low noise circuit

NO2 Sensor LIFETIME
Zero drift	ppb equivalent change/year in lab air	0 to 20
Sensitivity drift	% change/year in lab air, monthly test	<-20 to -40
Operating life	months until 50% original signal (24 month warranted)	> 24

NO2 Sensor ENVIRONMENTAL
Sensitivity @ -20℃	(% output @ -20℃/output @ 20℃) @ 2ppm NO2	50 to 80
Sensitivity @ 40℃	(% output @ 50℃/output @ 20℃) @ 2ppm NO2	115 to 130
Zero @ -20℃	nA	0 to 25
Zero @ 40℃	nA	20 to 50

NO2 Sensor CROSS SENSITIVITY
H2S	sensitivity % measured gas @ 5ppm H2S	<100
NO	sensitivity % measured gas @ 5ppm NO	<5
Cl2	sensitivity % measured gas @ 5ppm Cl2	<85
SO2	sensitivity % measured gas @ 5ppm SO2	<-6
CO	sensitivity % measured gas @ 5ppm CO	<0.1
C2H4	sensitivity % measured gas @ 100ppm C2H4	<0.1
NH3	sensitivity % measured gas @ 20ppm NH3	<0.1
H2	sensitivity % measured gas @ 100ppm H2	<0.1
CO2	sensitivity % measured gas @ 5% Vol CO2	0.1
Halothane	sensitivity % measured gas @ 100ppm Halothane	<0.1

NO2 Sensor KEY SPECIFICATIONS
Temperature range	℃	-30 to 40
Pressure range	kPa	80 to 120
Humidity range	% rh continuous	15 to 85