At Daviteq, we have 03 advanced technologies for measuring or detect gas/vapor:
- Electro-chemical Gas Sensor.
- NDIR Gas Sensor.
- PID Gas Sensor.
Here is the summary of each technology.
1. Electro-chemical Gas Sensor:
Daviteq Electro-chemical (EC) 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 the 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.
Please check this link for more information: Daviteq Electro-Chemic... | Online Product Manuals & Datasheets
Typical products:
- Non-Exd: https://www.iot.daviteq.com/wireless-sensors/lorawan-gas-detecting-sensor
- Exd: https://www.iot.daviteq.com/wireless-sensors/lorawan-ex-d-electro-chemical-gas-sensor
2. NDIR Gas Sensor:
Daviteq NDIR Gas sensor module is intended for automatically continuously measuring hydrocarbons or carbon dioxide concentration in the atmosphere. The sensor operating principle is based on NDIR technology, i.e., on selective absorption of LED-produced infrared radiation by gas molecules. The differential dual wavelength method allows the elimination of water vapor, optical elements contamination, and other non-selective hindrances influence.
It has ultra-low power consumption to allow it to be integrated with Wireless Devices such as Sub-GHz transmitters, Sigfox transmitters, LoRaWAN transmitters, RS485 output transmitters, etc.
It can be calibrated with target gas like CO2, CH4, C3H8, C2H4, and C2H6…
Typical Applications: Flammable gas detection and CO2 gas monitor.
Please check this link for more information: Daviteq NDIR Gas Sensor | Online Product Manuals & Datasheets
Typical products:
- Non-Exd: https://www.iot.daviteq.com/wireless-sensors/lorawan-carbon-dioxide-sensor
- Exd: https://www.iot.daviteq.com/wireless-sensors/lorawan-ex-d-ndir-flammable-gas-sensor
3. PID Gas Sensor:
A PID (Photoionization Detector) gas sensor is a highly sensitive device used to detect and measure volatile organic compounds (VOCs) and certain hazardous gases in the air. It works by using ultraviolet (UV) light to ionize gas molecules. When VOCs or other detectable gases are exposed to the UV light, they are ionized, creating an electric current proportional to the gas concentration. This technology provides real-time monitoring and is ideal for detecting trace amounts of gases.
Gases Detected by PID Sensors
PID sensors can detect a wide range of volatile organic compounds (VOCs) and toxic industrial chemicals (TICs), including:
- Hydrocarbons: Benzene, toluene, xylene…
- Solvents: Acetone, ethanol, methanol…
- Aromatic Compounds: Formaldehyde, styrene…
- Other VOCs: Hexane, isopropanol, ethylene oxide…
However, they are not effective for detecting inorganic gases like hydrogen sulfide (H₂S), carbon monoxide (CO), or ammonia (NH₃), as these gases do not ionize under UV light.
Please check this link for more information: Miniature PID Gas Sensor | Online Product Manuals & Datasheets
Typical products:
- Non-Exd: to be advised later
- Exd: https://www.iot.daviteq.com/wireless-sensors/lorawan-ex-d-pid-gas-sensor
What types of gas sensors are you using in your factory? Please share with us your experience using this sensor.