daviteq AV10-G4-NH3 Manual

Manual for AV10-G4-NH3 sensor
for Livestock
1. Introduction
Daviteq NH3 Gas sensor for Livestock is a NH3 gas measuring sensor that utilizes the Seri-4 electrochemical sensor
with a high sensitivity to low concentrations of detected gas, high selectivity, and a stable baseline. It has an ultra-low
noise amplifier to amplify the nano-ampere current signal from the sensor and delivers the stable and high-resolution
output.
* For some applications with high humidity ambient all the time, the sensor can come with a heater to control the
humidity within the working range of the sensor.
2. Calibration of the Daviteq NH3 Gas Sensor
2.1 Why do we need to calibrate the gas sensor? There are some
reasons:
- The sensor current output of a sensor is different from the other sensor. It is not the same value for all sensors after
manufacturing.
- The sensor current output of a sensor will be changed over time. For example, the NH3 sensor current output will be
reduced by about 5% of the signal per six months in clean air at 25 oC temperature.
- The R_gain of the circuit also has a 0.1% or 0.05% tolerance;
Therefore, users need to calibrate the sensor before use or in a pre-defined interval time (6 or 12 months for example).
2.2 How to calibrate the NH3 Gas sensor?
Instructions to attach the calibration cap onto the sensor module to get Zero or Span values.
Step 2. Attach the calibration cap to the sensor head
Step 1. Remove the Filter and prepare the calibration cap