SENKO

Electrochemical NH₃ Sensor (0–100ppm)

DESCRIPTION

The SS21N8 is a high-sensitivity electrochemical ammonia (NH₃) sensor designed for precise detection within the 0–100 ppm range. It features a linear output of 100 ± 30 nA/ppm and a fast T90 response time under 30 seconds. With low cross-sensitivity to gases like H₂S, H₂, and NO₂, the SS21N8 ensures reliable and accurate measurements. It is suitable for use in applications such as pharmaceuticals, cosmetics, refrigeration systems, and industrial gas detection systems. The sensor offers a typical operating life of over 24 months in air.

KEY FEATURES

- Measuring Range: 0–100 ppm (Max overload: 200 ppm)
- Output Signal: 100 ± 30 nA / ppm
- Response Time: T90 < 30 sec
- Resolution: <1 ppm (typical, depending on electronics)
- Operating Temperature: -20℃ ~ +50℃
- Operating Life: ≥24 months (in air)
- Low Cross-sensitivity: H₂S, NO₂, H₂

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<tr><th colspan="2" style="text-align: center;">Performance Characteristics</th></tr>

<tr><td>Output Signal</td><td>100±30 nA / ppm</td></tr>

<tr><td>Typical Baseline Range (pure air, @ 20℃)</td><td>±2 ppm NH₃ equivalent</td></tr>

<tr><td>Response Time (T90)</td><td>< 30 seconds</td></tr>

<tr><td>Filter</td><td>None</td></tr>

<tr><td>Measurement Range</td><td>0-100 ppm</td></tr>

<tr><td>Maximum Overload</td><td>200 ppm</td></tr>

<tr><td>Linearity</td><td>Linear</td></tr>

<tr><td>Repeatability</td><td>< ±10% of signal</td></tr>

<tr><td>Recommended Load Resistor</td><td>10 ohms</td></tr>

<tr><td>Resolution (Electronics Dependent)</td><td>< 1 ppm typical</td></tr>

<tr><td>Bias Voltage</td><td>0 mV</td></tr>

<tr><th colspan="2" style="text-align: center;">Environmental</th></tr>

<tr><td>Temperature Range Continuous</td><td>-20℃ to +50℃</td></tr>

<tr><td>Pressure Range</td><td>800 to 1200 mbar</td></tr>

<tr><td>Operating Humidity Range</td><td>15% to 90% RH</td></tr>

<tr><th colspan="2" style="text-align: center;">Lifetime</th></tr>

<tr><td>Long Term Output Drift</td><td>< 10% per annum</td></tr>

<tr><td>Recommended Storage Temp</td><td>0℃ to 20℃</td></tr>

<tr><td>Expected Operating Life</td><td>> 24 months in air</td></tr>

<tr><td>Standard Warranty</td><td>24 months from date of dispatch</td></tr>

<tr><th colspan="2" style="text-align: center;">Intrinsic Safety Data</th></tr>

<tr><td>Maximum at 200 ppm</td><td>50 μA</td></tr>

<tr><td>Maximum o/c Voltage</td><td>< 1.0 V</td></tr>

<tr><td>Maximum s/c Current</td><td>< 0.1 A</td></tr>

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PRODUCTS

Product

SS21N8 (NH₃)

SS21N8 (NH₃)

Electrochemical NH₃ Sensor (0–100ppm)

DESCRIPTION

KEY FEATURES

Product Specifications

Sensor Specifications

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