Daviteq Gas Detection Technologies
Daviteq G4 Gas sensor module is a gas measuring module 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
to the reading devices such as Sub-GHz transmitter, Sigfox transmitter, LoRaWAN transmitter, RS485 output
transmitter, etc.
The module can support various types of gas sensors such as CO, NO, NO2, H2S, NH3, O2, O3, SO2, Cl2, HCHO...
Typical Applications: Gas, toxic gas detecting, air quality monitoring for facility, building, pump station, HVAC...
* 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.
Sensor technology
Seri-4 electrochemical gas sensor. Please check
for the
specifications of each gas type.
Sensor housing / Rating
SS316/SS304 housing with 316SS sintered filter / for Indoor use (buy the
optional accessory rain-guard for outdoor installation)
What is cross-sensitivity?
The electrochemical sensor is normally affected by other gas. It meant the sensor not only measure the target gas but
also the other gases. If there is a concentration of other gas, it would also cause the change in sensor output with a
factor listed in the below table.
Please check the cross-sensitivity data of each gas type in
.
The very low current from the gas sensor is amplified by a special amplifier circuit to deliver stable and high resolution.
The special mechanism provides noise filtering so that it can deliver a very stable output. The ADC chip can provide a
resolution from 16-bit to 24-bit.
The circuit will deliver the digital output to the reading device.
With an ultra-low-power design, it can run by battery for 10-20 years!
The G4 sensor module will deliver 02 values:
Gas concentration, in ppm or ppb.
Daviteq G4 Gas Sensor -
Measurement Principle
1. Introduction
1.1 Overview
1.2 Specification
Note: Do not install the sensor where the ambient humidity is higher than 90% RH most of the time! It will
cause the sensor to malfunction.
1.3 Cross Sensitivity Data
2. Detail measurement principle
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