Abstract
Advances in gas sensors and open-source hardware are enabling new options for low-cost and light-weight gas sampling devices that are also robust and easy to use and construct. Although the number of studies investigating these sensors has been increasing in the last few years, they are still scarce with respect to agricultural applications. Here, we present a complete system for high-accuracy measurements of temperature, relative humidity, luminosity, and CO2 concentrations. The sensors suite is integrated on the previously developed HyperRail device (Lopez Alcala et al., 2019) – a reliable, accurate, and affordable linear motion control system. All measurements are logged with a location and time-stamp. The system was assembled from only off-the-shelf or 3D printable products. We deployed the system in an agricultural greenhouse to demonstrate the system capabilities.
Highlights
Advances in gas sensors and open-source hardware are enabling new options for low-cost and light-weight gas sampling devices that are robust and easy to use and construct
We present a complete system for high-accuracy measurements of temperature, relative humidity, luminosity, and CO2 concentrations
The spatial and temporal distribution of CO2 at the earth-atmosphere interface and at the boundary layer above it is of great importance for soil, agricultural and atmospheric sciences
Summary
The spatial and temporal distribution of CO2 at the earth-atmosphere interface and at the boundary layer above it is of great importance for soil, agricultural and atmospheric sciences. Using a low-cost electrochemical CO2 sensor, which is a relatively low-accuracy analog sensor, they provided a CO2 concentration map inside a greenhouse. Their device had temperature, relative humidity and luminosity sensors. Data from these sensors can be used for better greenhouse operation decision-making. NDIR sensors are based on absorption spectroscopy and consist of a light source, a sample cavity and a detector [12] We integrated this gas sensor together with temperature, relative humidity, and luminosity sensors, on a single logging device to gain high spatial and temporal resolution of the greenhouse environment.
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