Sensirion SHT40-AD1F-R2 Humidity & Temperature Sensor ±1.0%RH, I2C, Automotive Grade
Sensirion SHT40-AD1F-R2 Humidity & Temperature Sensor ±1.0%RH, I2C, Automotive Grade - Image 2
SKU: SENS-3490
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Sensirion SHT40-AD1F-R2 Humidity & Temperature Sensor ±1.0%RH, I2C, Automotive Grade

₹259.00 (Inclusive of all taxes)
Out of Stock

The Sensirion SHT40-AD1F-R2 is a high-precision digital humidity and temperature sensor designed for demanding automotive and industrial applications. Featuring an I2C interface with FM+ support, it delivers ±1.0% RH and ±0.1°C accuracy across an extended operating range, making it compatible with 3.3V systems and battery-powered designs.

Features

  • High Accuracy: ±1.0% RH humidity and ±0.1°C temperature precision.
  • Extended Operating Range: Functions from -40°C to 125°C and 0 to 100% RH.
  • Ultra-Low Power: Average current of 0.4 µA and idle current of 80 nA for battery life.
  • Robust I2C Interface: FM+ compliant with multiple selectable addresses and CRC data integrity.
  • Automotive Durability: Patented PTFE membrane, removable cover, and integrated power heater for condensing environments.

Out of stock

Description

The SHT40-AD1F-R2 leverages Sensirion’s proven CMOSens® technology, integrating a capacitive humidity sensor and a band-gap temperature sensor on a single chip. This digital sensor provides fully calibrated, linearized signals via a fast I2C interface, ensuring reliable data acquisition in harsh environmental conditions.

Engineered for automotive-grade reliability, the sensor includes a patented PTFE hydrophobic membrane for protection against liquids and contaminants. An integrated, configurable power heater allows for operation in condensing atmospheres and can be used for diagnostic self-checks. Each unit is individually factory-calibrated and comes with a unique serial number and NIST-traceable certificate.

Key Features

  • High-precision capacitive sensing element with excellent long-term stability.
  • Ultra-low power consumption profile ideal for always-on, battery-powered monitoring systems.
  • Integrated power heater with three adjustable levels for operation in condensing or polluted environments.
  • Digital I2C FM+ interface (up to 1 MHz) with two selectable addresses and CRC checksum for robust communication.
  • Patented PTFE membrane and removable protective cover ensure sensor longevity in demanding applications.
  • Fully functional across the entire humidity range, including condensing conditions, with heater support.
  • Individually tested and calibrated with a unique serial number and ISO 17025 accredited, NIST-traceable certificate.
  • Wide supply voltage range from 1.08V to 3.6V, compatible with low-voltage microcontrollers.

Applications

  • Automotive cabin air quality and climate control systems.
  • Industrial process monitoring and control in harsh environments.
  • Battery-powered IoT devices for environmental data logging.
  • HVAC and building automation for precise humidity management.
  • Test and measurement equipment requiring NIST-traceable calibration.

Technical Specifications

Manufacturer Part NumberSHT40-AD1F-R2
Sensor TypeDigital Humidity & Temperature
Humidity Accuracy±1.0 %RH
Temperature Accuracy±0.1 °C
Humidity Range0 to 100 %RH
Temperature Range-40 to 125 °C
Supply Voltage1.08 to 3.6 V
Average Current0.4 µA
Idle Current80 nA
InterfaceI2C (FM+ up to 1 MHz)
I2C Addresses0x44 (default), 0x45 (alternate)
Response Time (τ63%)8 s (slow), 4 s (medium), 1 s (fast)
HeaterIntegrated, configurable power heater
ProtectionPatented PTFE membrane, removable cover
CalibrationNIST-traceable, 3-point, ISO 17025 accredited
Dimensions (L x W)1.5 x 1.5 mm

Frequently Asked Questions

What is the supply voltage range for the SHT40-AD1F-R2 sensor?

The SHT40-AD1F-R2 operates from 1.08V to 3.6V DC, making it compatible with standard 3.3V systems and low-power battery applications. The I2C interface pins are 5.5V tolerant, allowing safe connection to 5V logic microcontrollers with appropriate pull-up resistors.

How does the integrated power heater function, and when should it be used?

The integrated heater can be activated via the I2C command interface at three power levels. It is primarily used to evaporate condensation from the sensor membrane, enabling operation in 100% RH environments, or for diagnostic purposes to check sensor functionality. Use it sparingly in battery-powered designs as it increases current consumption significantly.

What I2C addresses are available, and how is data integrity ensured?

The default I2C address is 0x44, with an alternate address of 0x45 selectable via command. Every data transmission is protected by an 8-bit CRC checksum, ensuring high data integrity in electrically noisy environments typical of automotive or industrial settings.

Does the sensor include calibration documentation?

Yes. Each SHT40-AD1F-R2 unit is individually factory-calibrated and comes with a unique serial number and a 3-point NIST-traceable calibration certificate accredited to ISO 17025 standards. This documentation is essential for applications requiring metrological traceability and quality assurance.

Is this sensor suitable for outdoor or condensing environments?

Yes, the SHT40-AD1F-R2 is designed for harsh conditions. Its patented PTFE membrane protects the sensing element from water and contaminants. Combined with the configurable power heater, the sensor can operate reliably in condensing atmospheres, making it suitable for outdoor weather stations, automotive exterior sensing, and industrial control.

Package Includes

  • 1 x Sensirion SHT40-AD1F-R2 Humidity & Temperature Sensor

Additional Information

Weight 0.005 kg
Dimensions 0.15 × 0.15 cm

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