Sensirion SHT40-AD1B-R2 Humidity & Temperature Sensor, 0 to 100%RH, −40°C to +125°C, ±1.8%RH, I2C Interface, DFN-8 Package
Sensirion SHT40-AD1B-R2 Humidity & Temperature Sensor, 0 to 100%RH, −40°C to +125°C, ±1.8%RH, I2C Interface, DFN-8 Package - Image 2
SKU: SENS-3505
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Sensirion SHT40-AD1B-R2 Humidity & Temperature Sensor, 0 to 100%RH, −40°C to +125°C, ±1.8%RH, I2C Interface, DFN-8 Package

₹201.00 (Inclusive of all taxes)
Out of Stock

The Sensirion SHT40-AD1B-R2 is a fully calibrated digital humidity and temperature sensor with an I2C interface, designed for seamless integration into 3.3V systems like Arduino, Raspberry Pi, ESP32, and STM32. It delivers high-accuracy environmental sensing for a wide range of industrial and consumer applications.

Features

  • High-accuracy humidity sensing with ±1.8% RH typical tolerance
  • Integrated temperature sensor with wide −40°C to +125°C range
  • Low-voltage I2C digital interface (1.08V to 3.6V supply)
  • Ultra-low power consumption for battery-operated devices
  • Compact, reflow-solderable DFN-8 surface-mount package

Out of stock

Description

The SHT40-AD1B-R2 leverages Sensirion’s advanced CMOSens® technology, combining a capacitive polymer humidity sensing element and a band-gap temperature sensor on a single chip. This integrated digital signal processing provides fully calibrated, linearized digital outputs, ensuring high signal integrity and long-term stability.

Designed for harsh environments, the sensor offers excellent resistance to contaminants and condensation. Its wide operating voltage range and I2C fast-mode compatibility make it ideal for integration into HVAC control systems, portable data loggers, weather stations, and industrial process monitoring equipment.

Key Features

  • High-Precision Sensing: Delivers ±1.8% RH humidity accuracy and ±0.2°C temperature accuracy for reliable environmental data.
  • Optimized Signal Conditioning: On-chip analog-to-digital conversion and temperature compensation provide stable, ready-to-use digital readings.
  • Wide Operational Envelope: Functions reliably across a full −40°C to +125°C temperature range and 0-100% RH humidity span.
  • Ultra-Low Power Architecture: Engineered for minimal current draw, making it suitable for energy-conscious IoT and wearable applications.
  • Robust DFN Package: The 8-pin Dual Flat No-lead (DFN) housing is designed for automated PCB assembly and offers strong mechanical durability.
  • Factory Calibrated: Each sensor is individually calibrated and tested, ensuring consistent performance and eliminating the need for user calibration.

Applications

  • HVAC system control and indoor air quality monitoring
  • Weather stations and portable environmental data loggers
  • Industrial process monitoring in manufacturing and storage facilities
  • Battery-powered IoT devices and smart home sensors
  • Medical equipment requiring precise climate control

Technical Specifications

Manufacturer Part NumberSHT40-AD1B-R2
Sensor TypeHumidity & Temperature
Humidity Range0 to 100 %RH
Humidity Accuracy±1.8 %RH (typical)
Temperature Range−40°C to +125°C
Supply Voltage1.08 to 3.6 V DC
InterfaceI2C (Fast Mode up to 1 MHz)
Output TypeDigital
Package / CaseDFN-8
Operating Temperature−40°C to +125°C
CalibrationFully calibrated

Frequently Asked Questions

What is the operating voltage range for the SHT40-AD1B-R2 sensor?

The SHT40-AD1B-R2 operates from a wide supply voltage range of 1.08V to 3.6V DC. This makes it directly compatible with 3.3V logic systems common in microcontrollers like ESP32, STM32, and Raspberry Pi, without requiring a level shifter.

How do I communicate with this sensor using the I2C interface?

Communication is via the standard I2C protocol. The sensor supports fast mode (up to 1 MHz) and uses a 7-bit address. You can send measurement commands and read back the calibrated humidity and temperature data packets using standard I2C library functions on your host microcontroller.

Is the sensor calibrated, and what is its typical accuracy?

Yes, each SHT40-AD1B-R2 is factory calibrated. It provides a typical humidity accuracy of ±1.8% RH and a typical temperature accuracy of ±0.2°C. This high precision is maintained across the full measurement range, ensuring reliable data without user calibration.

Can this sensor be used outdoors or in harsh environments?

Yes, its robust DFN package and wide operating temperature range (−40°C to +125°C) make it suitable for demanding applications. However, for prolonged outdoor use, consider proper enclosure design to protect the PCB-mounted sensor from direct water exposure and UV radiation.

Package Includes

  • 1 x Sensirion SHT40-AD1B-R2 Humidity & Temperature Sensor

Additional Information

Weight 0.02 kg
Dimensions 11 × 9 × 5 cm

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