YJJ NO2-B1 0-20PPM Electrochemical Nitrogen Dioxide Sensor Industrial Safety Emissions Monitoring

Product Description:

YJJ NO2-B1 0-20PPM Electrochemical Nitrogen Dioxide Sensor Industrial Safety Emissions Monitoring

Features:

I. Core Parameters (25℃, air environment)
Target gas: Nitrogen Dioxide (NO₂)
Measurement range: 0–20 ppm
Sensitivity: -450 ~ -1000 nA/ppm (10 ppm NO₂)
Resolution: 0.02 ppm (suitable for low concentration measurement)
Response time T90: < 60 s (0→10 ppm)
Linear error: < ±0.2 ppm (linear good from 0–10 ppm)
Overload: 100 ppm (can withstand for a short time)
Zero drift: < 0.2 ppm/year (long-term stability)
Operating temperature: -20℃ ~ +50℃
Operating humidity: 15%–90% RH (can handle high humidity, outdoor / water-wash environment)
Load resistance: 33 Ω
Life / Warranty: > 24 months (long-life for industrial grade)
II. Working Principle
Electrochemical three-electrode (working / counter / reference):
NO₂ diffuses onto the working electrode surface and undergoes redox reaction;
Generates a current signal proportional to the concentration (nA level);
The reference electrode maintains a stable potential, providing a circuit to the working electrode;
Output current → Conversion of concentration (ppm) by the rear-end circuit.
Features: Only sensitive to NO₂, high accuracy at low concentrations, small long-term drift, suitable for long-term monitoring at fixed points.
III. Main Applications (Key Scenarios)
Environmental air quality monitoring
Urban air stations, park / factory boundaries, roadside stations for NO₂ monitoring (conforms to national low-concentration requirements)
Industrial safety and emissions
NOx monitoring in boilers / kilns / flue gas, leakage alarm in metallurgy / chemical / pharmaceutical workshops
Risk control for underground garages, tunnels, parking lots (NO₂超标 triggers exhaust ventilation)
Buildings and HVAC
Air quality monitoring in new ventilation systems, air ducts, computer rooms (stable in high-humidity environments)
Environmental protection equipment and instruments
Fixed NO₂ detectors, online monitoring systems, portable / handheld analyzers core sensing elements

Specifications: