Ascenta ASHT20/21 MEMS Temperature & Humidity Sensor - I2C Digital Output

Name: Ascenta ASHT20/21 MEMS Temperature &amp; Humidity Sensor - I2C Digital Output
Brand: Ascenta
SKU: SENS-3500
Price: 71.00 INR
Availability: OutOfStock

₹71.00 (Inclusive of all taxes)

Out of Stock

The Ascenta ASHT20/21 is a high-precision digital MEMS sensor for accurate humidity and temperature measurement, featuring a standard I2C interface for seamless integration with microcontrollers like Arduino, Raspberry Pi, ESP32, and STM32.

Features

High-precision MEMS sensing with ±3% RH and ±0.5°C accuracy.
Wide operating ranges: 1% to 99% RH and -40°C to 80°C.
Standard I2C digital communication protocol for easy system integration.
Fast response times: 8 seconds for humidity, 5 seconds for temperature.
Low power consumption with a wide supply voltage range of 2.2V to 5.5V.

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Description

The Ascenta ASHT20/21 leverages advanced MEMS (Microelectromechanical Systems) technology to deliver stable and reliable humidity and temperature readings. Its capacitive sensing element for humidity and integrated band-gap sensor for temperature provide excellent long-term stability and repeatability, making it suitable for demanding environmental monitoring tasks.

Designed for low-power operation, the sensor supports a sleep mode current of 250nA and a measurement current of 980µA, ideal for battery-powered IoT devices. The digital I2C output ensures noise-immune communication and simplifies wiring, allowing for direct connection to a wide array of development platforms and industrial data acquisition systems.

Key Features

High-accuracy MEMS-based humidity and temperature sensing.
Excellent measurement repeatability: ±0.1% RH and ±0.1°C.
Superior long-term stability: 0.5% RH/year and 0.04°C/year drift.
Ultra-low power consumption with configurable sleep and active modes.
Wide operating voltage range from 2.2V to 5.5V for flexible system design.
Standard I2C digital interface for simplified integration and daisy-chaining.
Fast thermal and hygroscopic response for dynamic environment tracking.
Robust construction suitable for industrial and consumer applications.

Applications

HVAC system monitoring and climate control.
Smart home and building automation for environmental sensing.
Data logging in weather stations and agricultural monitoring systems.
Precision environmental control in laboratories and pharmaceutical storage.
Battery-powered IoT devices for asset tracking and condition monitoring.

Technical Specifications

Model Number	ASHT20/21
Humidity Range	1% to 99% RH
Temperature Range	-40°C to 80°C
Humidity Accuracy	±3% RH
Temperature Accuracy	±0.5°C
Humidity Response Time	8 seconds
Temperature Response Time	5 seconds
Humidity Hysteresis	±1% RH
Temperature Hysteresis	±0.1°C
Supply Voltage	2.2 VDC to 5.5 VDC
Communication Protocol	Standard I2C
Operating Temperature	-40°C to 80°C

Frequently Asked Questions

What is the operating voltage range for the ASHT20/21 sensor?

The ASHT20/21 sensor operates from 2.2V to 5.5V DC, making it compatible with both 3.3V and 5V logic systems commonly found in Arduino, Raspberry Pi, and other microcontroller platforms.

What communication protocol does this sensor use?

This sensor utilizes the standard I2C (Inter-Integrated Circuit) digital communication protocol. It requires connection to the SDA (data) and SCL (clock) lines of your host controller, along with power and ground.

How accurate and fast is the ASHT20/21 sensor?

The sensor provides an accuracy of ±3% RH for humidity and ±0.5°C for temperature. It features fast response times, achieving 63% of a step change in 8 seconds for humidity and 5 seconds for temperature.

Is this sensor suitable for outdoor or industrial environments?

With an operating temperature range of -40°C to 80°C and robust MEMS construction, the ASHT20/21 is well-suited for a wide range of environments, including outdoor weather stations, industrial monitoring, and HVAC systems, though it may require protective housing against direct water exposure.