Product Specification

NO2-A43F Nitrogen Dioxide Sensor (NO2 Sensor) Description
Alphasense Nitrogen Dioxide gas sensors operate using proven fuel cell technology.

NO2-A43F Nitrogen Dioxide Sensor sizes:
20mm diameter, the industry standard size for portable gas detectors

The NO2 range provides OEMs with reliable sensors for use in a number of high volume applications. Strong signal levels combined with low zero current allows resolution to 50 parts per billion (ppb) and an operating range to 20ppm. The sensors are suitable for use in fixed installation sensing heads, portable safety instruments, urban air monitoring and stack gas analysers.

The NO2 sensors offer our electrolyte leak-free guarantee and reliable long-term detection performance. The leakproof housing is moulded with a colour coded top for ease of identification.

NO2-A43F Nitrogen Dioxide Sensor (NO2 Sensor) PERFORMANCE
Sensitivity	nA/ppm at 2ppm NO2	-175 to -450
Response time	t90 (s) from zero to 2ppm NO2	< 60
Zero current	nA in zero air at 20°C	-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-A43F Nitrogen Dioxide Sensor (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-A43F Nitrogen Dioxide Sensor ENVIRONMENTAL
Sensitivity @ -20°C	(% output @ -20°C/output @ 20°C) @ 2ppm NO2	40 to 80
Sensitivity @ 40°C	(% output @ 50°C/output @ 20°C) @ 2ppm NO2	95 to 115
Zero @ -20°C	nA	0 to +25
Zero @ 40°C	nA	20 to 60
NO2-A43F Nitrogen Dioxide Sensor (NO2 Sensor) CROSS SENSITIVITY
O3	Filter capacity (ppm hrs) @ 2ppm O3	> 500
H2S	sensitivity % measured gas @ 5ppm H2S	< -80
NO	sensitivity % measured gas @ 5ppm NO	< 5
Cl2	sensitivity % measured gas @ 5ppm Cl2	< 75
SO2	sensitivity % measured gas @ 5ppm SO2	< -5
CO	sensitivity % measured gas @ 5ppm CO	< -5
C2H4	sensitivity % measured gas @ 100ppm C2H4	< 1
NH3	sensitivity % measured gas @ 20ppm NH3	< 0.2
H2	sensitivity % measured gas @ 100ppm H2	< 0.1
CO2	sensitivity % measured gas @ 5% Vol CO2	0.1
Halothane	sensitivity % measured gas @ 100ppm Halothane	nd
NO2-A43F Nitrogen Dioxide Sensor (NO2 Sensor) KEY SPECIFICATIONS
Temperature range	°C	-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

Matched Transmitter board for NO2-A43F NO2 Sensor

Analogue Front End (AFE) Alphasense A4 Air Quality Sensors
The family of Analogue Front End (AFE) circuits are designed for use with the A4 air quality sensors. Connect the AFE with A4 sensors to your multtiplexed ADC and you are recording air quality data immediately.