Sensirion Temperature/Humidity sensors are renowned for their exceptional accuracy, with the SHT41 sensor representing the fourth generation of I2C temperature and humidity sensors. This sensor boasts an impressive ±1.8% RH accuraccy from 25 - 75% and ±0.2 °C accuracy from 0 - 75 °C.
Note that compared to the SHT40, the SHT41 has the same typical accuracy of ±1.8% RH from 25-75% but has much better accuracy over the full humidity range, with a typical accuracy of ±2% over the 0-100% RH range, whereas the SHT40 has a worst-case typical accuracy of ±3%. Also, the SHT41 max accuracy is ±3% where as the SHT40 has a max accuracy of ±6%. So basically, you'll get better accuracy for not-much-more cost. If you need the 'best' of the SHT4x series, check out the SHT45
Unlike some earlier SHT sensors, this sensor has a true I2C interface for easy interfacing with only two wires (plus power and ground!). Thanks to the voltage regulator and level shifting circuitry we've included on the breakout It is also is 3V or 5V compliant, so you can power and communicate with it using any microcontroller or microcomputer.
Such a lovely chip - so we spun up a breakout board with the SHT41 and some supporting circuitry such as pullup resistors and capacitors. To make things even easier, we've included SparkFun Qwiic compatible STEMMA QT connectors for the I2C bus so you don't even need to solder! QT Cable is not included, but we have a variety in the shop.
If you prefer working on a breadboard, each order comes with one fully assembled and tested PCB breakout and a small piece of header. You'll need to solder the header onto the PCB, but it's fairly easy and takes only a few minutes even for a beginner.
We've written both Arduino and CircuitPython/Python library code for this chip, so you can use it with just about any microcontroller or single-board computer like Raspberry Pi.
Technical Details
SHT41 Specifications & Features
- Relative humidity accuracy: up to ±1.8 %RH
- Temperature accuracy: up to ±0.2 °C
- Breakout supply voltage: 3.3 to 5V
- Average bare sensor current: 0.4 μA (at meas. rate 1 Hz)
- Idle bare sensor current: 80 nA
- I2C fast mode plus, CRC checksum
- Operating range: 0…100 %RH, -40…125 °C
- Fully functional in condensing environment
- Variable power heater
- NIST traceability for sensor
- JEDEC JESD47 qualification for sensor
- Mature technology from global market leader Sensirion
- I2C address 0x44
Product Dimensions: 25.5mm x 17.6mm x 4.8mm / 1.0" x 0.7" x 0.2"
Product Weight: 1.7g / 0.1oz
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