How accurate is the water level measurement?

Typical water level accuracy varies by sensor model. The CTD-04 (0–13 ft) provides the highest resolution at approximately ±0.3 cm typical error. The CTD-01 (0–30 ft) and CTD-02 (0–100 ft) provide approximately ±0.5 cm and ±1.5 cm typical error respectively. The CTD-03 (0–251 ft) provides approximately ±3.8 cm typical error. All figures assume accurate reference water level measurement, known water density, and a stable temperature environment.