Product Description

Sapiens Sensor Tube DF-4 is a long-term outdoor air quality monitoring with integrated autonomous data quality control capabilities. The product can measure criteria air pollutants including nitrogen monoxides (NO), nitrogen dioxide (NO2), ozone (O3), carbon monoxide (CO) with near reference data quality under all weather conditions. 

Sapiens Sensor Tube DF-4  is equipped with the Pair Differential Filter (PDF) sensing technology using paired filter for continuous tracking of virtual baseline for the gas sensors signals. With effective reduction of the impact of environmental temperature and humidity, the air pollution measurement data quality has been greatly improved by this technology. The DF-4 is suitable for the monitoring of atmospheric pollutants under versatile micro-environments with dynamic changing humidity and temperature transients. 

Data transmission to designated Sapiens cloud server or user designated server through API and direct TCP links are optional. The intended applications are complementary air quality monitoring with high data performance target needs and near reference data quality requirement for the government agency, communities, research projects needs.

Product Features

• At least two gas modules capable of measuring nitrogen monoxide (NO), nitrogen dioxide (NO2), ozone (O3), and carbon monoxide (CO) etc, all together simultaneously using respective electrochemical sensors equipped.
• Pair Differential Filter (PDF) sensing technology is enabled for gas sensors to auto track the virtual baseline of sensor signals; 
• The gas module converts sensor signals to gas concentration via an algorithm stored in the system firmware and is configured to log both sensor electrodes raw voltage outputs and converted gas concentrations in ppb (for O3, NO2 and NO) or ppm (for CO). Measurements are logged and reported in real-time.
• The NO2 sensor is equipped with ozone filter membrane to remove interference from O3. 
• On-site traceable gas calibration option is available during field maintenance. 
• Replaceable battery to support long term operation without external power supply.
• Algorithm on Chip (AoC) is enabled for gas concentration direct output with auto quality control.

Application Cases plications

• Smart city sensor network
• Urban air pollution monitoring
• Roadside air quality monitoring
• Emergency air quality monitoring

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