TE Connectivity HTU21D HPP845E131R1 Humidity & Temperature Sensor, 0–100%RH, −40°C to +125°C, ±3%RH, I2C

Name: TE Connectivity HTU21D HPP845E131R1 Humidity &amp; Temperature Sensor, 0–100%RH, −40°C to +125°C, ±3%RH, I2C
Brand: TE Connectivity
SKU: SENS-1018
Price: 211.00 INR
Availability: OutOfStock

₹211.00 (Inclusive of all taxes)

Out of Stock

The TE Connectivity HTU21D (HPP845E131R1) is a fully calibrated digital humidity and temperature sensor with I2C interface, designed for direct integration with microcontrollers like Arduino, Raspberry Pi, ESP32, and STM32. It provides reliable environmental sensing from 0 to 100% RH and -40°C to +125°C.

Features

High-accuracy digital humidity sensor with ±3% RH typical accuracy.
Wide operating range: 0 to 100% relative humidity and -40°C to +125°C temperature.
Fully calibrated digital I2C output ensures plug-and-play operation with no additional calibration required.
Ultra-compact DFN-EP-6 package (3 x 3 x 0.9 mm) for space-constrained, high-volume OEM applications.
Low-power design compatible with automated, Pb-free reflow soldering processes.

Out of stock

Get Notified When Available

Description

The HTU21D (HPP845E131R1) from TE Connectivity is a MEMS-based capacitive humidity sensor with an integrated band-gap temperature sensor. It delivers factory-calibrated, linearized digital signals via a standard I2C interface, simplifying direct connection to microcontrollers and embedded systems. The sensor’s robust design ensures stable performance across its full humidity and temperature range.

Housed in a miniature, reflow-solderable DFN package, it is engineered for automated assembly lines and applications with stringent space and traceability requirements. Its low power consumption and fast recovery from saturation make it suitable for demanding industrial, HVAC, and consumer electronics environments.

Key Features

Fully calibrated and linearized digital output for humidity and temperature via I2C.
Excellent long-term stability and fast response time for dynamic environmental monitoring.
Ultra-small 3x3x0.9mm DFN-EP-6 surface-mount package with an exposed pad for enhanced thermal performance.
Designed for high-volume, cost-sensitive OEM applications with full interchangeability.
Compatible with lead-free reflow soldering and automated pick-and-place assembly processes.
Low power consumption ideal for battery-powered portable devices and IoT nodes.
Individual laser marking provides full traceability for quality control and compliance.

Applications

HVAC system control and environmental monitoring for precise climate management.
Industrial process control and data logging in manufacturing environments.
Portable weather stations and IoT-based smart agriculture monitoring systems.
Consumer electronics for in-device humidity and temperature compensation.
Medical devices and incubators requiring stable environmental sensing.

Technical Specifications

Manufacturer Part Number	HPP845E131R1
Sensor Model	HTU21D
Humidity Range	0 to 100 %RH
Humidity Accuracy	±3 %RH (typical)
Temperature Range	-40°C to +125°C
Interface	I2C Digital
Supply Voltage (Max)	3.8 V
Package Type	DFN-EP-6
Package Dimensions	3 x 3 x 0.9 mm

Frequently Asked Questions

What is the operating voltage range for the HTU21D sensor?

The HTU21D sensor has a maximum supply voltage of 3.8V. It is typically operated at 3.3V, making it directly compatible with most 3.3V microcontroller logic levels found on platforms like ESP32, Raspberry Pi, and many STM32 boards. Always ensure your supply does not exceed the absolute maximum rating.

How do I connect and communicate with this sensor using I2C?

The sensor uses a standard I2C interface. Connect the SDA and SCL pins to your microcontroller's corresponding I2C pins, along with 3.3V power and ground. The default I2C address is 0x40 (7-bit). You can use standard Arduino libraries or direct register reads to request humidity and temperature data.

Is the sensor data pre-calibrated, or do I need to calibrate it myself?

The HTU21D is fully factory-calibrated, providing linearized digital output. No user calibration is required under standard conditions, ensuring true plug-and-play operation and full interchangeability between units for OEM production.

Is this sensor suitable for reflow soldering?

Yes, the DFN-EP-6 package is specifically designed for automated, lead-free (Pb-free) reflow soldering processes. The sensor can withstand standard surface-mount technology (SMT) assembly profiles, making it ideal for high-volume PCB manufacturing.