Target: Ammonia NH3
Model: UE-NH3
Detection range: 0~100ppm
Detection principle: Electrochemical
Characteristics: Long acting, Work life 5 years
Resolution and accuracy: (80~160)nA/ppm
Response time: ≤120S

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UE-NH3 long-acting ammonia sensor is a constant potential electrolytic electrochemical sensor. Ammonia undergoes an oxidation-reduction reaction inside the sensor and releases electric charges to form a current. The concentration of ammonia can be determined by measuring the magnitude of the current.


Widely used to detect and monitor ammonia NH3 gas (odor gas) in animal husbandry, industry, and environmental protection etc.


  • Low consumption
  • High precision
  • High sensitivity
  • Wide linear range
  • Good anti-interference ability
  • Excellent repeatability and stability


Detection gas  AmmoniaNH3 
Measurement Range 0~100ppm
Max detecting concentration 200ppm
Sensitivity (80~160)nA/ppm
Resolution ratio 0.5ppm
Response time(T90) ≤120S
Bias voltage 0mV
Load resistance(recommended) 10Ω
Repeatability <2﹪output value
Stability(/month) <2﹪
Output Linearity linear
Zero drift(-20℃~40℃) -3~10ppm
Storage temperature -25℃~60℃
Storage Humidity 15﹪~90﹪RH
Pressure range Standard atmosphere±10%
Anticipated using life 5 years(in air)

* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.

Technical Support:

Customized technical design and function, LOGO and package are available without extra charge (including molding fee) for mass volume.

The sensors don't have sleeping mode. It can be set in program if needed.

All Winsen products go through strict inspections and tests to make sure they are 100% qualified before shipping out.

The sensor has been fully tested (not calibrated) before leaving the factory. However, after transportation and storage, the environment conditions change, and the surface of the sensor absorbs moisture, mixed gas, pollution matters, etc. It is recommended that customers perform aging and calibration after sensors become stable according to the program and use occasions of the whole device.

15﹪-90﹪RH without condensation,greater or less than this range or long-term high temperature and high humidity will affect the life of the sensor.

Our sensors are certified with CE, 3C, ROHS, anti-explosion, fire prevention, and coal mining safety according to different applications. And we provide assistance for new certification.

Many factors can cause the sensor to fail such as broken wires in transportation, poisoning, falling off of the sensitive material, damage to the heating wire (device), etc. Please find specific cause in each category with Winsen’s aftersales.

Winsen provides professional consultation and service before and after sales. We will recommend the best fitting sensor for your demand. If you have any problem, don’t hesitate to email us to

Due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. But we will reply to your inquiry in 24 business hours.