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CO2 Humidity and Temperature Sensor - SCD30
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Price: $119.24
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Sparkfun Item #: SEN-15112 -

The SCD30 from Sensirion is a high quality Nondispersive Infrared (NDIR) based CO₂ sensor capable of detecting 400 to 10000ppm with an accuracy of ±(30ppm+3%). In order to improve accuracy the SCD30 has temperature and humidity sensing built-in, as well as commands to set the current altitude. For additional accuracy the SCD30 also accepts ambient pressure readings! We've written an Arduino library to make reading the CO₂, humidity, and temperature very easy. It can be downloaded through the...

Qwiic Pressure/Humidity/Temp (PHT) Sensor - MS8607
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Price: $43.25
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Sparkfun Item #: SPX-16298 -

The MS8607 from TE is an impressive combination pressure, humidity, temperature (PHT) sensor with accuracy of ±2mbar pressure, ±3% humidity, and ±1°C. Perfect for sensing general weather conditions the MS8607 really shines for high altitude, low pressure applications. Capable of sensing down to 10mbar, this pressure sensor separates itself from many other I2C pressure sensors like the BME280. The MS8607 is simple to use and gives the user some very powerful readings with very little power and...

SparkFun Altitude/Pressure Sensor Breakout - MPL3115A2
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Price: $24.93
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Sparkfun Item #: SEN-11084 -

Life has its ups and downs, so why not measure them? The MPL3115A2 is a MEMS pressure sensor that provides Altitude data to within 30cm (with oversampling enabled). The sensor outputs are digitized by a high resolution 24-bit ADC and transmitted over I2C, meaning it's easy to interface with most controllers. Pressure output can be resolved with output in fractions of a Pascal, and Altitude can be resolved in fractions of a meter. The device also provides 12-bit temperature measurements in...

SparkFun Atmospheric Sensor Breakout - BME280
Price: $35.36
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Sparkfun Item #: SEN-13676 -

The SparkFun BME280 Atmospheric Sensor Breakout is the easy way to measure barometric pressure, humidity, and temperature readings all without taking up too much space. Basically, anything you need to know about atmospheric conditions you can find out from this tiny breakout. The BME280 Breakout has been design to be used in indoor/outdoor navigation, weather forecasting, home automation, and even personal health and wellness monitoring. The on-board BME280 sensor measures atmospheric pressure...

SparkFun Atmospheric Sensor Breakout - BME280 (Qwiic)
Price: $24.93
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Sparkfun Item #: SEN-15440 -

The SparkFun BME280 Atmospheric Sensor Breakout is an easy way to measure barometric pressure, humidity, and temperature readings, all without taking up too much space. Basically, you can find out anything you need to know about atmospheric conditions from this tiny breakout. The BME280 Breakout has been designed to be used in indoor/outdoor navigation, weather forecasting, home automation, and even personal health and wellness monitoring. Utilizing our handy Qwiic system, no soldering is...

SparkFun Barometric Pressure Sensor Breakout - MPL115A1
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Price: $23.26
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Sparkfun Item #: SEN-09721 -

Now mounted on a breakout board, the MPL115A1 is a digital barometer that uses MEMs technology to give accurate pressure measurements between 50kPa and 115kPa. We stock the SPI interface version of the sensor. Average current consumption is 10µA at one measurement per second. The sensor outputs both temperature and pressure readings on the SPI bus. See page 3 of the datasheet for information on how to take readings from the pressure sensor. Features: Wide supply voltage range -40°C to 105°C...

SparkFun Environmental Combo Breakout - CCS811/BME280 (Qwiic)
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Price: $61.24
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Sparkfun Item #: SEN-14348 -

The SparkFun CCS811/BME280 Environmental Combo Breakout takes care of all your atmospheric-quality sensing needs with the popular CCS811 and BME280 ICs. This unique breakout provides a variety of environmental data, including barometric pressure, humidity, temperature, TVOCs and equivalent CO2 (or eCO2) levels. To make it even easier to use this breakout, all communication is enacted exclusively via I2C, utilizing our handy Qwiic system. However, we still have broken out 0.1" spaced pins in...

SparkFun Environmental Sensor Breakout - BME680 (Qwiic)
Price: $31.60
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Sparkfun Item #: SEN-16466 -

The SparkFun BME680 Environmental Sensor is a breakout that combines a gas sensor with temperature, humidity and barometric pressure sensing for a complete environmental sensor in a single package. The gas sensor on the BME680 can detect a wide variety of volatile organic compounds (or VOC for short) to monitor indoor air quality. Combine that with precise temperature, humidity, and barometric pressure and the BME680 can work as a completely standalone environmental sensor all in a 1in. x 1in....

SparkFun gator:environment - micro:bit Accessory Board
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Price: $34.69
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Sparkfun Item #: SEN-15269 -

The SparkFun gator:environment micro:bit Accessory Board utilizes the popular CCS811 and BME280 ICs to take care of all of your environmental readings of atmospheric quality. This sensor board can provide a variety of environmental data, including barometric pressure, humidity, temperature, equivalent TVOCs and equivalent CO2 (or eCO2) levels. The gator:environment connects to the SparkFun gator:bit via alligator-clip cables, allowing for easy access to the micro:bit's I2C pins. The CCS811 is...

SparkFun Humidity and Temperature Sensor Breakout - HIH6130
Price: $54.07
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Sparkfun Item #: SEN-11295 -

It's not the heat but the humidity that gets you, at least that's what they say. Really, both are important, what you need is a sensor that combines humidity and temperature readings. How about this Honeywell HumidIcon Digital Humidity/Temperature Sensor? The HIH6130 is a digital output-type relative humidity (RH) and temperature sensor combined in the same package. This allows the RH measurement to be temperature compensated and provides a second, standalone temperature sensor output. This...

SparkFun Humidity and Temperature Sensor Breakout - Si7021
Price: $14.35
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Sparkfun Item #: SEN-13763 -

The Si7021 is a low-cost, easy-to-use, highly accurate, digital humidity and temperature sensor. This sensor is ideal for environmental sensing and data logging and perfect for build a weather stations or humidor control system. All you need are two lines for I2C communication, and you’ll have relative humidity readings and very accurate temperature readings as a bonus! There are only four pins that need to be hooked up in order to start using this sensor in a project. One for VCC, one for...

SparkFun Humidity Sensor Breakout - HIH-4030
Price: $34.21
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Sparkfun Item #: SEN-09569 -

This is a breakout board for Honeywell's HIH-4030 humidity sensor. The HIH-4030 measures relative humidity (%RH) and delivers it as an analog output voltage. You can connect the output of the sensor directly to an ADC on a microcontroller; and, thanks to the sensor's near linear voltage output, the data is very easy to process. Voltage applied to the supply pins should be within 4-5.8VDC, and optimally at 5V. The sensor will typically only consume about 200μA. This product comes as shown in...

SparkFun Humidity Sensor Breakout - SHTC3 (Qwiic)
Price: $16.59
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Sparkfun Item #: SEN-16467 -

Looking to keep a log of the climate in your greenhouse, create a humidor control system or want to track temperature and humidity data for a weather station project? The SparkFun SHTC3 Humidity Sensor may be the perfect option for you! The SHTC3 is a low cost, easy-to-use, highly accurate digital humidity and temperature sensor. The SHTC3 communicates via I2C so, as you can tell by the name, we have broken out the pins on the sensor to Qwiic connectors so you can easily connect it to...

SparkFun Lightning Detector - AS3935
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Price: $41.61
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Sparkfun Item #: SEN-15441 -

The SparkFun Lightning Detector adds lightning detection to your next weather station to make sure you are aware of any potential hazardous weather heading your way. The AS3935 is capable of detecting lightning up to 40km away with an accuracy of 1km to the storm front with a sensitive antenna tuned to pick up lightning events in the 500kHz band. There are a number of sources that can cause false positives but the lightning detector itself can reliably filter these out by default. If not,...

SparkFun Photon Weather Shield
Price: $33.27
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Sparkfun Item #: DEV-13674 -

The SparkFun Photon Weather Shield is an easy-to-use add-on board that grants you access to barometric pressure, relative humidity, and temperature. There are also connections on this shield to optional sensors such as wind speed, direction, rain gauge and soil readings! These Weather Shields utilize the Si7021 temperature/humidity and MPL3115A2 barometric pressure sensors. Each shield comes with two RJ11 connectors (for optional hookup of rain and wind sensors) and a 3-pin soil temperature...

SparkFun Pressure Sensor Breakout - MS5803-14BA
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Price: $99.97
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Sparkfun Item #: SEN-12909 -

This is the MS5803-14BA Pressure Sensor Breakout, a high resolution pressure sensor with both an I2C and SPI interface. This MEMS pressure sensor measures the absolute pressure of the fluid around it which includes air, water, and anything else that acts like a viscous fluid. Depending on how you interpret the data, you can determine altitude, water depth, or any other tasks that require an accurate pressure reading. What makes the MS5803-14BA unique is the the gel membrane and antimagnetic...

Vernier Sensor -  Gas Pressure Sensor
Price: $172.91
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Sparkfun Item #: SEN-12874 -

This is the Vernier Gas Pressure Sensor, an easy to operate tool that can be used to monitor pressure changes of a gaseous element. The range on this Vernier sensor is wide enough to perform pressure vs. volume (Boyle’s law) experiments yet it is sensitive enough to conduct vapor-pressure or pressure-temperature experiments. These Gas Pressure Sensors offer the user to test in a pressure range of 0 to 2.1 atm (0 to 210 kPa) to a max of 4 atm. Driving this sensor is the Honeywell...

Weather Meter Kit
Price: $115.12
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Sparkfun Item #: SEN-15901 -

Whether you're an agriculturalist, a professional meteorologist or a weather hobbyist, building your own weather station can be a really rewarding project. When you're measuring weather, however, you need some pretty specialized sensors. This kit represents the three core components of weather measurement: wind speed, wind direction and rainfall. None of the sensors in this kit contain active electronics, instead they use sealed magnetic reed switches and magnets so you'll need to source a...