Ammonia Sensor (NH3 Sensor) - NH3-B1

• Range: 100ppm NH3 limit of performance warranty
• Sensitivity: 25 to 45nA/ppm in 50ppm NH3
• Resolution: <0.3 RMS noise (ppm equivalent)
• Response time t90: <60 (s) from zero to 50ppm NH3
• Temperature range​: -30 to 50​°C​
• Pressure range​: 80 to 120 ​kPa​
• Humidity range​: 15 to 90​ % rh continuous​
• Weight: <13 g

  • Model Number: NH3-B1
  • Data Sheet: Date Sheet File
Quantity:
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  • Ammonia Sensor (NH3 Sensor)
  • Ammonia Sensor (NH3 Sensor)
  • Ammonia Sensor (NH3 Sensor)
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Product Specification

NH3-B1 Ammonia Sensor Description
Alphasense is expanding its line of electrochemical toxic gas sensors to address industry-specific requirements, including emissions monitoring, process safety, environmental monitoring and VOCs.

Ammonia (NH3)
Our first family of Ammonia sensors. This sensor is designed for higher concentrations of Ammonia. Sensors for lower level detection are in development.


NH3-B1 Ammonia Sensor PERFORMANCE 
Sensitivity
nA/ppm in 50ppm NH3
25 to 45
Response time
t90 (s) from zero to 50ppm NH3
<60
Zero current
ppm equivalent in zero air
< ± 7
Resolution
RMS noise (ppm equivalent)
<0.3
Range
ppm NH3 limit of performance warranty
100
Linearity
ppm error at full scale, linear at zero and 20ppm NH3
+5 to -5
Overgas limit
maximum ppm for stable response to gas pulse
200



NH3-B1 Ammonia 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 (24 month warranted)
>24



NH3-B1 Ammonia Sensor ENVIRONMENTAL
Sensitivity @ -20°C
% (output @ -20°C/output @ 20°C) @ 20ppm
ND
Sensitivity @ 50°C
% (output @ 50°C/output @ 20°C) @ 20ppm
ND
Zero @ -20°C
ppm equivalent change from 20°C
ND
Zero @ 50°C
ppm equivalent change from 20°C
ND



NH3-B1 Ammonia Sensor CROSS SENSITIVITY
H2S  sensitivity
% measured gas @ 20ppm H2S
<300
NO2  sensitivity
% measured gas @ 20ppm NO2
<-300
Cl2    sensitivity
% measured gas @ 10ppm Cl2
<-300
NO    sensitivity
% measured gas @ 50ppm NO
ND
SO2   sensitivity
% measured gas @ 20ppm SO2
ND
CO     sensitivity
% measured gas @ 400ppm CO
<20
H2     sensitivity
% measured gas @ 400ppm H2
<15
C2H4 sensitivity
% measured gas @ 400ppm C2H4
ND
CO2   sensitivity
% measured gas @ 5% CO2
ND



NH3-B1 Ammonia 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
<13


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