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Electrochemical NH3 Ammonia Gas Sensor Module FS01601

  • NH3 detection sensor module
  • Support UART and MODBUS-RS485
  • Three-electrode electro-chemical sensor
  • Outstanding anti-interference
  • Temperature compensation
  • Reliable service for sustainable cooperation


FS01601 is a fuel cell type electrochemical sensor that works by the oxidation and reduction reactions on the working electrode and counter electrode, releasing charges to form a current. The magnitude of the current generated is proportional to the concentration of ammonia and follows Faraday’s law. By testing the magnitude of the current, the ammonia concentration can be determined. It uses a high-stability gas sensor and a high-performance microprocessor that supports UART output and Modbus-RS485 output for easy use. The module adopts precise automatic calibration and detection equipment, reducing human interference and ensuring the accuracy and consistency of data during large-scale production.


1.Detection range

Default: 0~20PPM


2.High accuracy, high consistency, high solution, rapid response

Data detection accuracy: ±≤5% reading

Minimum solution: 0.1 ppm

Response time: T90 ≤60s


3.Data output methods

FS01601 supports UART and MODBUS-RS485


4.Long service life

The lifetime is up to 1 year (in the air)


5.High detection frequency

The data updates once per second by default.




Parameter type Parameter index
Detection Type NH3 Gas
Detection Principle Three-electrode electro-chemical
Detection Range 0~20PPM
Max Load 100PPM
Detection Accuracy Solution 0.1ppm
Data Accuracy Max error±≤5% Reading
Operation Voltage DC 3.7V~5.5V
Operation Current ≤0.3mA (@5V power supply)
Warm-up Time 3 min
Detection Frequency The data is updated once per second (Default)
Output Methods  Default: UART (3.3V_TTL Voltage level)
Reserve: MODBUS-RS485
Customizable: 4~20mA、0~5V、0~10V
Service Life 1 Year (in the air)
Reference Dimension 32.3×32.3×16.5 mm
Operation Temperature -10℃~ 50℃
Operation Humidity 0~95%RH (Non-Condensation)
Storage Temperature -20℃~ 60℃
Storage Humidity 0~95%RH (Non-Condensation)
Pressure Range 800~1200 mbar

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