Comparison page

HC-SR04 vs SCD30

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.

SCD30

Projects needing CO2 and Humidity with a commonly available sensors part.

Specification Matrix

DimensionHC-SR04 SCD30

CategorySensorsSensors

MakerGenericSensirion

CoreNot specifiedNot specified

ClockNot specifiedNot specified

WirelessNot specifiedNot specified

Voltage3.3V3.3V

LibrariesArduino, MicroPythonArduino

Price$0.80 - $2.00$35.00 - $60.00

Known Tradeoffs

HC-SR04

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

SCD30

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

SCD30

Sensirion

CO2, temperature, and humidity module used for higher-quality indoor air monitoring.

China-madeSensors86% confidence