Cheap VS. Brand temperature and humidity sensors

Title

SHT31 Temperature & Humidity Sensor Comparison: Adafruit vs AliExpress Budget Alternatives

One-Sentence Summary

A hands-on comparison test between brand-name Adafruit SHT31 sensors and cheap AliExpress alternatives reveals that the budget sensors actually demonstrate better consistency despite higher upfront costs for premium options.

Key Takeaways

• [0:00] The creator tests two Adafruit SHT31 sensors (~$14 each) against two AliExpress no-name versions (~$2 each) using a Raspberry Pi RP2040 microcontroller with dual I2C buses to accommodate the sensors' limited addressing options

• [2:05] Temperature consistency favors AliExpress sensors with variance around 0.4°C compared to Adafruit's maximum variance of 0.7°C, which exceeds the manufacturer's ±0.3°C tolerance specification

• [3:07] Humidity readings show AliExpress sensors are more consistent with variations under 1.5%, significantly lower than Adafruit's ~3-4% variance, though both remain within acceptable tolerances

• [3:38] Sensor performance can be affected by proximity to the microcontroller and other sensors, suggesting environmental factors should be considered when evaluating results

• The creator recommends using budget AliExpress sensors for projects prioritizing cost-effectiveness and consistency over premium build quality and professional connectors, making them suitable for applications like multi-point temperature monitoring for fan control

Suggested Category Tags

IoT, Sensor Testing, Arduino/Raspberry Pi, Electronics Project, Budget vs Premium Comparison