Comparison page

MQ-135 vs SHT31

Side-by-side selection notes for specs, ecosystem readiness, known issues, and data confidence. This page is generated from structured component fields instead of a hand-written article.

MQ-135

Projects needing Air quality and Gas with a commonly available sensors part.

SHT31

Projects needing High accuracy and I2C with a commonly available sensors part.

Specification Matrix

DimensionMQ-135 SHT31

CategorySensorsSensors

MakerWinsenSensirion

CoreNot specifiedNot specified

ClockNot specifiedNot specified

WirelessNot specifiedNot specified

Voltage3.3V3.3V

LibrariesArduinoArduino, MicroPython

Price$0.80 - $2.50$3.00 - $6.00

Known Tradeoffs

MQ-135

Breakout boards may use different pin labels or regulator choices
Clone modules can differ from the original datasheet part

SHT31

Breakout boards may use different pin labels or regulator choices
Clone modules can differ from the original datasheet part

Open Individual Model Pages

MQ-135

Winsen

Low-cost gas sensor module often marketed for air quality experiments.

China-madeSensors66% confidence

SHT31

Sensirion

Digital humidity and temperature sensor used in more accurate environmental monitoring modules.

China-madeSensors86% confidence