Description This is a new addition in response to many that asked for this. The Kit contain the PCB, all components without battery and enclosure. The user to purchase an enclosure and add the required holes. Readings of Temperature, Relative Humidity and Air Pressure are obtained from a BME280 sensor. The following is then calculated and displayed, two lines at a time with a time delay of 3 seconds: Temperature, Relative Humidity, Barometric Air pressure in hPa, Altitude in meter (pinned from sea pressure 1013.25 hPa), Saturation Vapour Pressure in mmHg, Actual Vapour Pressure against the measured RH% in mmHg, Virtual Temperature in Kelvin, Speed of Sound in m/s (Mach 1), Air Density listed as Rho in kg/m^3, Density Altitude in Ft, Density Altitude in m. If you are tired of bad readings from a remote web site, then this is for you. PCBs done in batches of 5, delivery 3 weeks from date of order if no PCB’s in current stock. Specifications: Pressure Range: 300 – 1100 hPa (Equiv. to 9000 / -500 meters above / below sea level) Pressure Relative Accuracy (700 to 900hPa @ 25 to 40°C): ±0.12hPa (Equiv. to ±1 meter) Humidity Range: 0 to 100 %RH between 0 and 60°C Humidity Absolute Accuracy Tolerance (20 to 80 %RH @25°C): ±3 %RH Temperature Sensor Range: -40 ~ 85°C Temperature Sensor Absolute Accuracy (0 to 65°C): ±1.0°C Operating Range: -40 to 85°C, 0 to 100% Relative Humidity, 300 to 1100 hPa
