OpenCO2’s David Kreidler has designed a significantly extra compact model of his firm’s carbon dioxide sensor, designed to plug into the USB Sort-C connector of a smartphone for taking readings on-the-go — and it is known as, sensibly sufficient, the OpenCO2 Mini Sensor.
“Introducing the OpenCO2 Mini Sensor, an extremely compact and highly effective indoor air high quality monitor designed for well being, consolation, and comfort,” Kreidler says of his new design. “Measuring simply 2×2.7cm [around 0.79×1.06″], this tiny gadget packs cutting-edge know-how right into a glossy, clear 3D-printed case that is excellent for attaching to your keychain or slipping into your pocket. Keep knowledgeable about your atmosphere wherever you go!”
Fancy monitoring carbon dioxide ranges on the go? That is what the brand new OpenCO2 Mini Sensor goals to ship. (📷: OpenCO2)
The guts of the brand new sensor is the Sensirion STCC4 carbon dioxide sensor in a package deal combining it with the Sensirion SHT40 temperature and humidity sensor, related to an Espressif ESP32-S3 microcontroller on a thumb-sized PCB that by some means additionally finds room for an RGB standing LED. It is a totally different setup to the unique OpenCO2 Sensor, which opted for the Sensirion SCD40 and positioned it in a 3D-printed desktop housing behind a 1.54″ ePaper show with an Espressif ESP32-S3 to drive all the things.
The brand new mannequin is compact, and primarily designed with smartphones in thoughts — promising “seamless” connection to the Sensirion MyAmbience app on Apple iOS by way of Bluetooth Low Vitality (BLE). Like its predecessor, although, the sensor can be related to a Wi-Fi community and built-in into Dwelling Assistant and different sensible residence platforms — or the RGB LED will be noticed to offer a three-stage color-coded at-a-glance take a look at environmental carbon dioxide concentrations.
The brand new mannequin is appreciable smaller than the unique OpenCO2 Sensor, primarily because of the dearth of display screen and battery. (📷: OpenCO2)
“Common air flow is essential to sustaining wholesome indoor air high quality. The OpenCO2 Mini Sensor supplies a easy, inexpensive, and transportable answer to observe CO2 ranges, serving to you make knowledgeable choices to enhance your atmosphere,” Kreidler claims. “Whether or not you are a health-conscious particular person, a DIY fanatic, or a wise residence integrator, this sensor delivers professional-grade efficiency in a pocket-sized package deal.”
The OpenCO2 Mini Sensor is now obtainable on Kreidler’s Tindie retailer at $49.95, roughly half the worth of the unique OpenCO2 Sensor; supply code for the unique sensor is obtainable on GitHub underneath the permissive MIT license, however the repository didn’t seem to include the firmware for the brand new mannequin on the time of writing.
