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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:

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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	? (recommended)	10 to 47
Weight	g	< 6