Adafruit Sensirion SHT40 Temperature & Humidity Sensor - STEMMA QT / Qwiic
In stock, ships same business day if ordered before 2PM
Fastest delivery: Tomorrow*
Disclaimer:
The shipping address needs to be in the AusPost next day network
and eParcel Express is chosen during checkout. On rare occasions, orders may be delayed by up to
one business day due to AusPost pickup timings or for order verifications.
Quantity Discounts:
- 10-25 $10.54 (exc GST)
- 25+ $10.32 (exc GST)
Sensirion Temperature/Humidity sensors are some of the finest & highest-accuracy devices you can get. And finally, Adafruit have some that have a true I2C interface for easy reading. The SHT40 sensor is the fourth generation (started at the SHT10 and worked its way up to the top!). The SHT40 has an excellent ±1.8% typical relative humidity accuracy from 25 to 75% and ±0.2 °C typical accuracy from 0 to 75 °C.
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 Adafruit have 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 they spun up a breakout board with the SHT4x and some supporting circuitry such as pullup resistors and capacitors. To make things even easier, Adafruit have 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 Adafruit 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.
Arduino have 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 Specifications
- 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
Exact shipping can be calculated on the view cart page (no login required).
Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).
We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):
- $3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
- $7+ for Standard Post (typically 6+ business days, tracked)
- $11+ for Express Post (typically 2+ business days, tracked)
- Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.
Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.
Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.
International Orders - the following rates are for New Zealand and will vary for other countries:
- $12+ for Pack and Track (3+ days, tracked)
- $16+ for Express International (2-5 days, tracked)
If you order lots of gear, the postage amount will increase based on the weight of your order.
Our physical address (here's a PDF which includes other key business details):
Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia
Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.
Have a product question? We're here to help!
SHT31 Weather-proof Temperature & Humidity SensorSKU: SEN0385 Brand: DFRobotThis is an SHT31 Temperature & Humidity sensor housed in a weather-proof enclosu ...- Rotary Encoder + ExtrasSKU: ADA377 Brand: AdafruitThis rotary encoder is the best of the best, its a high quality 24-pulse encoder ...
- Stepper motor - NEMA-17 size - 200 steps/rev, 12V 350mASKU: ADA324 Brand: AdafruitA stepper motor to satisfy all your robotics needs! This 4-wire bipolar stepper ...
- DFPlayer - A Mini MP3 PlayerSKU: DFR0299 Brand: DFRobotSing for the moment! The DFPlayer Mini is a small and low cost MP3 module with a ...
- PiicoDev Cable Expansion KitSKU: CE09146 Brand: PiicoDev
Top up your PiicoDev Starter kit with a range of the most used cables!
- Nano V3.0 BoardSKU: CE05101 Brand: Core ElectronicsThe Nano V3.0 is compatible with the Arduino Nano V3.0. This is a small, complet ...
- Pro Mini 05 BoardSKU: 018-MINI-05 Brand: Core ElectronicsIt’s blue! It’s thin! It’s the Pro Mini! This is a 5V board running the 16 ...
- Uno R3SKU: CE05629 Brand: Core ElectronicsThe Uno is a microcontroller board based on the ATmega328. It has 14 digital inp ...
Videos
View AllGuides
Weather Station with Arduino Tutorial
Micro:bit Temperature and Humidity Sensing
Temperature Sensing with the TMP36 and Pycom
The Maker Revolution
Projects
Raspberry Pi Pico Long Range Radio (LoRa) Weather and Air Quality Station - Full Dashboard (DataCake + TTN), Rain-Proof and Long Range
Camera Dew Controller
ThingSpeak temperature & pressure logger
Makers love reviews as much as you do, please follow this link to review the products you have purchased.
Product Comments