SKU: 2966271325

SparkFun Humidity and Temperature Sensor Breakout - Si7021 Weather

Sale price$1201.50 Regular price$1335.00
Save 10%

Pay in installments of $333.75 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Sep 27 - Oct 2

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

SparkFun Humidity and Temperature Sensor Breakout - Si7021 WeatherThe 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

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 GND, and two data lines for I2C communication. This breakout board has built-in 4.7K? pullup resistors for I2C communications. If you?re hooking up multiple I2C devices on the same bus, you may want to disable these resistors.

Note: Full drops of water can damage the sensor. We recommend wrapping the board in Teflon/irrigation tape for extreme conditions where water droplets may find their way onto the sensor.

Dimensions: 0.6" x 0.6"

Documents:

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 2966271325

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.9 ★★★★★
Based on 29 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
M
Verified Purchase
Mychailo Toloczko
Charlottesville, US
★★★★★ 5
Great lotion, not smelly
Size: 18 Ounce (Pack of 6)
Our go-to moisturizing lotion. Great price, and the best lotion we've used. And not fragrant!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 4, 2026
M
Verified Purchase
marjie zimmerman
Carnegie, US
★★★★★ 5
Good basic lotion
Size: 18 Ounce (Pack of 1)
Moisturizes and is good quality but it has a terrible smell until drying and then it has no scent
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
A
Verified Purchase
Abraham J. Sanchez
Waukegan, US
★★★★★ 4
Good product good price
Size: 18 Ounce (Pack of 6)
Pretty good, great price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
E
Verified Purchase
Erica
Port Orchard, US
★★★★★ 5
Generic is just as good
Size: 18 Ounce (Pack of 6)
Good value, just like the name brand - only drawback is they don’t come with pumps
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2026
B
Verified Purchase
Bethany
Cuba, US
★★★★★ 5
Love
Size: 18 Ounce (Pack of 1)
Love the natural oatmeal ingredients and scent! Has been applied to face as well as legs and seems to moisturize great! Is very soft after rubbing in and lasts a long time! Great value!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 15, 2026

recommand products