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MTHO3A1 Temperature and Humidity Sensor Module
MTHO3A1 Temperature and Humidity Sensor Module

MTHO3A1 Temperature and Humidity Sensor Module

The MTHO3A1 temperature and humidity sensor module, based on a MEMS gas-sensing element, is used to measure ambient temperature and humidity as well as the concentration of harmful substances in the air. Measurement data are transmitted via I²C or UART interfaces. The surface of the MEMS gas-sensing element can be protected with a filter membrane, and the air quality sensor module can be assembled using either a plug-in board or SMT mounting, depending on requirements.

Comprehensive and reliable evaluation of temperature, humidity, and air quality

Built-in temperature compensation and humidity compensation algorithms

High sensitivity and fast response

Very low power consumption (< 66 mW)

Compact size (17.8 mm × 15.2 mm × 2.5 mm)

Intelligent automatic baseline calibration

Baseline value can be reset, and baseline storage is configurable

Robust design with excellent long-term stability

Highly flexible assembly options and communication interfaces

Technical parameters

Sensing principle: MEMS metal oxide semiconductor sensor

Preheating time: 3 minutes

Communication protocol: I²C, UART

Calibration method: Intelligent baseline calibration, baseline value stored during power-off (configurable)

Supply voltage: 3.3V ± 0.1V, max. 20 mV ripple

Power consumption: Max. 66 mW @ 3.3 VDC (20 mA)

Measurement interval: 1 sec.

Operating temperature: -10 ~ +60 ℃

Operating humidity: 5 ~ 95% RH, non-condensing

Storage temperature: -40 ~ +85 ℃

Storage humidity: 5 ~ 95% RH, non-condensing

CO₂ detection range: 400–5000 ppm

TVOC detection range: 0 – 50,000 µg/m³

HCHO detection range: 0 – 2000 µg/m³

Temperature measurement range: -40 ~ 125 ℃

Humidity measurement range: 0 ~ 100% RH

Application scenarios

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