Nitrogen Dioxide Sensor (NO2 Sensor) 4-Electrode - NO2-B43F

• Range: 20 ppm NO 2 limit of performance warranty
• Sensitivity: -175 to -450 nA/ppm at 2ppm NO2
• Response time t90: < 60 s from zero to 2ppm NO2
• Temperature range: -30 to 40°C
• Pressure range: 80 to 120kPa
• Humidity range: 15 to 85 % rh continuous
• Weight: < 13 g

  • Model Number: NO2-B43F
  • Data Sheet: Date Sheet File
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  • Nitrogen Dioxide Sensor (NO2 Sensor) 4-Electrode
  • Nitrogen Dioxide Sensor (NO2 Sensor) 4-Electrode
  • Nitrogen Dioxide Sensor (NO2 Sensor) 4-Electrode
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Product Specification

NO2-B43F Nitrogen Dioxide Sensor (NO2 Sensor) Description
Alphasense Nitrogen Dioxide gas sensors operate using proven fuel cell technology.

Sensors are available in the following sizes:
A: 20mm diameter, the industry standard size for portable gas detectors
B: 32mm diameter package, the best choice for fixed site applications
D: miniature, with proven long-term performance. Sensors for the next generation of 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-B43F Nitrogen Dioxide Sensor (NO2 Sensor) Features:

1.  High resolution up to 20ppb

2.  Short response time of 60s

3.  Linear output, excellent linearity

4.  Interference of O3 gas is filtered


NO2-B43F 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  ppb error at full scale, linear at zero and 5ppm NO2  < ±0.5
Overgas limit  maximum ppm for stable response to gas pulse  50
* Tested with Alphasense ISB low noise circuit 



NO2-B43F 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-B43F Nitrogen Dioxide Sensor (NO2 Sensor) ENVIRONMENTAL
Sensitivity @ -20℃  (% output @ -20°C/output @ 20°C) @ 2ppm NO2  60 to 80
Sensitivity @ 40℃  (% output @ 40°C/output @ 20°C) @ 2ppm NO2  95 to 115
Zero @ -20℃  nA  0 to 25
Zero @ 40℃  nA  -10 to 50



NO2-B43F Nitrogen Dioxide Sensor (NO2 Sensor) CROSS SENSITIVITY
O3  Filter capacity (ppm.hr) @ 2ppm O3  > 500
H2S  sensitivity % measured gas @ 5ppm H2S  < -80
NO  sensitivity % measured gas @ 5ppm NO  < 5
Cl2  sensitivity % measured gas @ 5ppm Cl2  < 80
SO2  sensitivity % measured gas @ 5ppm SO2  < 5
CO  sensitivity % measured gas @ 5ppm CO  < 3
H2  sensitivity % measured gas @ 100ppm H2  < 0.1
C2H4  sensitivity % measured gas @ 100ppm C2H4  < 0.5
NH3  sensitivity % measured gas @ 20ppm NH3  < 0.2
CO2  sensitivity % measured gas @ 5% Vol CO2  < 0.1
Halothane  sensitivity % measured gas @ 100ppm Halothane  nd



NO2-B43F 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 (ISB circuit is recommended)  33 to 100
Weight  g  < 13



Matched Transmitter board for NO2-B43F NO2 Sensor

Individual Sensor Board (ISB) Alphasense B4 4-Electrode Gas Sensors
The Individual Sensor Board (ISB) is designed for use with the Alphasense B4 family of four-electrode gas sensors. This potentiostat provides a dual channel voltage output.
A low noise bandgap provides the bias voltage for NO sensors and the ISB can measure both oxidising (CO, H2S, SO2 and NO) and reducing (O3 and NO2) gases.
The ISB is configured for specific sensors: NO, NO2, O3 and CO / H2S / SO2 .
Designed for low power applications, the ISB requires 3.5 to 6.4 stable DC supply at only 1mA.

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