NO-B4 Nitric Oxide Sensor

NO Gas Sensor, Electrochemical, B-Series, 0–20 ppm NO (ppb-level resolution)

Best-in-class baseline stability for ambient nitric oxide air quality monitoring

The NO-B4 sensor is a ppb-capable nitric oxide sensor designed for environmental air quality applications that demand low noise and excellent baseline stability. These PPB-level NO-B4 sensors are ideal for fixed and portable air quality monitors using the B-Series 4-electrode platform.

In combination with the Alphasense Individual Sensor Board (ISB) low-noise circuit, NO-B4 sensors can achieve noise levels around 15 ppb with further reductions possible using digital smoothing, making it ideal for high-performance air quality networks and fixed installations.
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Key Specifications:

 

Sensor Model

Target Gas

Package Size

Concentration Range

Sensitivity

T90 Response Time

Lifetime

NO-B4

Nitric Oxide (NO)

B-Series, 4-electrode

0–20 ppm NO

500 to 850 nA/ppm in 2 ppm NO

<45 s (0 to 2 ppm step)

>24 months (24-month warranted, until 50% original signal)

 

Feature

Benefit

4-electrode B-Series NO sensor with ppb-level resolution

Supports high-quality ambient NO measurements in air quality networks

0–20 ppm measurement range for ambient and urban NO monitoring

Provides suitable dynamic range for typical urban and roadside NO levels

Low-noise performance when used with the Alphasense ISB circuit

Reduces detection limits and improves data quality in low-concentration environments.

Stable zero and low drift for long-term baseline integrity

Helps maintain stable baselines, reducing the need for frequent zeroing.

Designed for mainly fixed air quality applications with high humidity tolerance

Well suited to outdoor, high-humidity sites where reliability is critical.

>24-month operating life (until 50% of original signal)

Delivers long service life to minimise field maintenance and operational cost.