UK Alpha Alfa NH3-B1 Ammonia NH3 Sensor


SKU: 582977020980 Category:


Please note we have developed tailor made signal boards for this sensor, which can be purchased separately.
Contact us for more details about application of this sensor or various signal boards suitable for this sensor.

Model: NH3-B1

Brand: Alphasense

Material: mixture

Origin: other overseas regions

Output model category: analog sensor

Working principle: gas sensor

Applicable scenarios: environment, coal mine, metallurgy, fire fighting, petrochemical industry

Sensor category: gas sensor

Weight: 13g

NH3-B1 ammonia sensor:

Performance characterization

Working principle: electrochemistry

Effective electrodes: three electrodes (4 pins)

Range: 0 to 100 ppm

Maximum load: 200 ppm

Sensitivity: 20 ~ 60 nA/ppm

Baseline drift: ±10 ppm

Resolution: 0.3ppm

Response time (T90): ≤150s

Bias voltage requirements: +200 mV (different from other brands, the initial power-on requires 2~4 small polarization stabilization times)

Recommended load: 10~47Ω


Working conditions

Working temperature: -30℃ to 50 ℃

Working humidity: 15 to 90 %RH (no condensation)

Working pressure: 80 to 120 kPa


Storage time: 6 months (in special packaging box)

Storage temperature: 0℃ to 20 ℃

Service life: air>1 year

Warranty period: 12 months after delivery


Physical properties

Weight: about 13g

Location requirements: none



  1. It is forbidden to use an electric soldering iron to solder the lead wire of the sensor pin at high temperature. Please use it with the supplied pinhole!
  2. It is forbidden to use glue potting with strong heat, volatilization and corrosion properties!