Monitor Weather Sensor Relay Board LM393 Rain Foliar Leaf Moisture Module High Sensitivity for Arduino Robot Kit(1pcs)

This LM393-based moisture module delivers practical performance for hobbyist weather monitoring and leaf wetness detection applications. The dual-output design (analog and digital via comparator) provides flexibility, though the analog readings require calibration due to sensor drift. Rain detection works reliably with the included PCB probe, but sensitivity varies significantly with moisture type—leaf wetness readings differ from soil moisture due to capacitive coupling differences. The relay board integration is useful but adds unnecessary bulk; the LM393 comparator itself is the only genuinely valuable component. Output noise requires software filtering for stable readings, particularly in analog mode. Build quality is adequate for Arduino prototyping projects, though the probe connection uses simple headers prone to corrosion.