# Sensirion Temperature/Humidity Sensor - SHT11

**Type:** Product page · **SKU:** ADA246 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/sensirion-temperature-humidity-sensor-sht11.html ([markdown](https://core-electronics.com.au/sensirion-temperature-humidity-sensor-sht11.html.md))

## Retired product

This product is retired and no longer available for purchase. Replaced by: SEN0385.

**Replacement:** https://core-electronics.com.au/catalog/product/view/sku/SEN0385

## Description

Humidity is notoriously difficult to measure. Some of the scientific and electronic considerations to measuring humidity include: analog to digital interface and external circuitry which might require op-amps or oscillator circuitry; temperature compensation adjustments to calculate dew point; calibration against a known humidity source; mounting, protection and response time in the real-world. If you're interested in the details see Tracy Allen's web site (EME Systems) for his discussion.
 
 The Sensirion SHT1x addresses many of these issues head on. It is a smart sensor for both humidity and temperature, and it comes from the factory in a tiny package that incorporates the analog to digital interface. All that your microcontroller has to do is read out the humidity and temperature values through the two-wire digital serial interface. The only math required is a simple scale and offset. The SHT1x is factory calibrated so that it returns temperature with a resolution of 0.01 degrees Celsius and relative humidity with a resolution of 0.03 percent. The accuracy is better than most other sensors too. Worst-case temperature accuracy is +/- 2 degrees C - but in the "room temperature" range the accuracy better than +/- 1 degree C. The relative humidity sensor is similarly accurate: +/- 3.5% in the range 20% to 80%. This is quite remarkable for a low-cost sensor. Excellent for commercial or home-based projects that require such readings.

**Features:**

- Provides a fully calibrated, digital output
- Measure temperature with a resolution of 0.01 degrees and within +/- 2 degree accuracy
- Measures relative humidity with a resolution of 0.03%and within +/- 3.5% accuracy
- Low power consumption (typically 30 μW)
 
**Key Specifications:**

- Power requirements: 2.4 to 5.5 VDC
- Communication: Two-Wire Serial
- Dimensions: 0.43 x 0.49 in (11 x 12.5 mm)
- Operating temp range: -40 to +254.9°F (-40 to +123.8°C)
 

 **Downloads & Resources:**
 [Arduino Library](https://github.com/practicalarduino/SHT1x)
 Sensirion Kit Documentation (.pdf)
 Sensirion SHT1x Documentation and Source Code (.zip)
 Sensirion SHT1x Data Sheet (.pdf)
 [Javelin Stamp Example Code](https://core-electronics.com.au/Portals/0/Downloads/sw/Javelin/Java-SensirionHumidityTemp.zip) (.zip)
 N&V column "Environmental Sensing" #91 (.pdf)
 N&V code "Environmental Sensing" #91 (.zip)
 Sensor Objects for Propeller Programmers

## Technical Details

Dimensions (inc. headers):

- Length: 12.69mm/0.50in
- Width: 11.16mm/0.44in
- Height: 11.56mm/0.46in
- Weight: 1.03g/0.04oz
 
 ![](https://core-electronics.com.au/media/wysiwyg/resources/rohs_icon.jpg)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/2/4/246-00.jpg)