Comparison page

HC-SR04 vs MQ-2

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.

HC-SR04

Projects needing Distance and Ultrasonic with a commonly available sensors part.

MQ-2

Projects needing Gas and Analog with a commonly available sensors part.

Specification Matrix

DimensionHC-SR04 MQ-2

CategorySensorsSensors

MakerGenericWinsen

CoreNot specifiedNot specified

ClockNot specifiedNot specified

WirelessNot specifiedNot specified

Voltage3.3V3.3V

LibrariesArduino, MicroPythonArduino

Price$0.80 - $2.00$0.80 - $2.50

Known Tradeoffs

HC-SR04

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

MQ-2

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

Open Individual Model Pages

HC-SR04

Generic

Classic ultrasonic distance sensor module used in robotics obstacle detection and beginner projects.

China-madeSensors78% confidence

MQ-2

Winsen

Low-cost combustible gas sensor module frequently used in beginner gas detection demos.

China-madeSensors68% confidence