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Ammonia Sensor (NH3 Sensor) - NH3-AF

• Range: 100 ppm NH3 limit of performance warranty
• Sensitivity: 20 to 40 nA/ppm in 50ppm NH3
• Response time: < 60 t90 (s) from zero to 50ppm NH3
• Resolution: < 0.7 RMS noise (ppm equivalent)
• Temperature range: -30 to 50 °C
• Pressure range: 80 to 120kPa
• Humidity range: 15 to 90 % rh continuous
• Weight: < 6g

  • Model Number: NH3-AF
  • Data Sheet: Date Sheet File
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  • Ammonia Sensor (NH3 Sensor)
  • Ammonia Sensor (NH3 Sensor)
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Product Specification

NH3-AF Ammonia Sensor (NH3 Sensor) Schematic Diagram


NH3-AF Ammonia Sensor (NH3 Sensor) PERFORMANCE
Sensitivity
 nA/ppm in 50ppm NH3
 20 to 40
Response time
 t90 (s) from zero to 50ppm NH3  (300 seconds)
 < 60
Zero current
 ppm equivalent in zero air
 < ± 7
Resolution
 RMS noise (ppm equivalent)
 < 0.7
Range
 ppm NH3 limit of performance warranty
 100
Linearity
 ppm error at full scale, linear at zero and 40ppm NH3
 +5 to -5
Overgas limit
 maximum ppm for stable response to gas pulse
 200



NH3-AF Ammonia Sensor (NH3 Sensor) LIFETIME
Zero drift
 ppm equivalent change/year in lab air
 < 2
Sensitivity drift
 % change/year in lab air, monthly test 
 < 3
Operating life
 months until 80% original signal  (12 month warranted)
 > 24



NH3-AF Ammonia Sensor (NH3 Sensor) ENVIRONMENTAL
Sensitivity @ -20°C
 % (output @ -20°C/output @ 20°C) @ 50ppm
 100 to 110
Sensitivity @ 50°C
 % (output @ 50°C/output @ 20°C) @ 50ppm
 100 to 110
Zero @ -20°C
 ppm equivalent change from 20°C
 -10 to 0
Zero @ 50°C
 ppm equivalent change from 20°C
 5 to 20



NH3-AF Ammonia Sensor (NH3 Sensor) CROSS SENSITIVITY
H2S  sensitivity
 % measured gas @ 20ppm H2S
 < ±3
NO2  sensitivity
 % measured gas @ 20ppm NO2
 < -60
Cl2    sensitivity
 % measured gas @ 10ppm Cl2
 < -300
NO    sensitivity
 % measured gas @ 50ppm NO
 < 20
SO2  sensitivity
 % measured gas @ 20ppm SO2
 nd
CO    sensitivity
 % measured gas @ 400ppm CO
 < 25
H2     sensitivity
 % measured gas @ 400ppm H2
 < 15
C2H4 sensitivity
 % measured gas @ 400ppm C2H4
 < 2
CO2  sensitivity
 % measured gas @ 5% CO2
 0



NH3-AF Ammonia Sensor (NH3 Sensor) KEY SPECIFICATIONS
Bias voltage
 mV (Working Electrode potential is above ground)
 +200
Temperature range
 °C
 -30 to 50
Pressure range
 kPa
 80 to 120
Humidity range
 % rh continuous
 15 to 90
Storage period
 months @ 3 to 20°C (stored in sealed pot)
 6
Load resistor
 Ω (recommended)
 10 to 47
Weight
 g
 < 6

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