Sensirion SHT45-AD1B-R2 Humidity & Temperature Sensor, 0 to 100%RH, −40°C to +125°C, ±1.0%RH, I2C Interface

Name: Sensirion SHT45-AD1B-R2 Humidity &amp; Temperature Sensor, 0 to 100%RH, −40°C to +125°C, ±1.0%RH, I2C Interface
Brand: Sensirion
SKU: SENS-3503
Price: 349.00 INR
Availability: OutOfStock

₹349.00 (Inclusive of all taxes)

Out of Stock

The Sensirion SHT45-AD1B-R2 is a high-precision digital humidity and temperature sensor with an I2C interface, designed for seamless integration into 3.3V systems, Arduino, Raspberry Pi, and industrial data loggers. It provides accurate environmental monitoring across a wide operational range.

Features

High-precision humidity sensing with ±1.0% RH typical accuracy.
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-powered applications.
Robust DFN package suitable for reflow soldering.

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Description

The SHT45-AD1B-R2 is a MEMS-based capacitive humidity and band-gap temperature sensor from Sensirion’s fourth-generation platform. It features fully calibrated digital output, advanced signal processing, and proprietary algorithm-based humidity compensation for outstanding long-term stability and minimal drift.

Engineered for demanding environments, its wide operating temperature and robust DFN package make it suitable for industrial control systems, HVAC monitoring, and portable data loggers where reliable, accurate environmental data is critical.

Key Features

Sensirion CMOSens® technology for high reliability and precision.
Fully calibrated and linearized digital I2C output.
Excellent long-term stability with low hysteresis.
Wide supply voltage range from 1.08V to 3.6V DC.
Ultra-compact DFN package (2.5 x 2.5 x 0.9 mm) for space-constrained designs.
Low power consumption supports energy-efficient and battery-operated devices.
Designed for automatic assembly and reflow soldering processes.

Applications

HVAC system monitoring and control for indoor air quality.
Industrial process monitoring in manufacturing and cleanrooms.
Portable environmental data loggers and weather stations.
Smart home and building automation systems.
Battery-powered IoT devices for asset and condition monitoring.

Technical Specifications

Manufacturer Part Number	SHT45-AD1B-R2
Sensor Type	Humidity & Temperature
Humidity Range	0 to 100 %RH
Humidity Accuracy	±1.0 %RH (typical)
Temperature Range	−40°C to +125°C
Supply Voltage	1.08 to 3.6 V DC
Interface	I2C (Digital)
Output Type	Digital
Operating Temperature	-40°C to 125°C
Package Type	DFN

Frequently Asked Questions

What is the operating voltage range for the SHT45-AD1B-R2 sensor?

The SHT45-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 and ideal for low-power, battery-operated applications without requiring a level shifter.

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

The sensor uses a standard I2C (Inter-Integrated Circuit) protocol. You will need to connect the SDA (data) and SCL (clock) lines to your microcontroller, along with power and ground. The device has a 7-bit I2C address; consult the Sensirion datasheet for the specific address and command set for reading humidity and temperature data.

Is the SHT45 sensor calibrated, and what is its typical accuracy?

Yes, the SHT45-AD1B-R2 is fully factory calibrated. It delivers a typical humidity accuracy of ±1.0% RH across a significant portion of its 0-100% RH measurement range, ensuring reliable data out of the box without user calibration.

What is the physical package, and is it suitable for SMT assembly?

The sensor comes in a compact DFN (Dual Flat No-lead) package measuring 2.5 x 2.5 x 0.9 mm. It is designed specifically for surface-mount technology (SMT) and is fully reflow solderable, making it suitable for high-volume automated PCB assembly processes.