The HOBO Level Meter is high quality!
Powered by two user-replaceable AA batteries
Logging modes: Normal, multi-rate, and burst
Durable ceramic sensor
3-point NIST-traceable calibration certificate included for water pressure sensor
Environments: Top-end logger operates in outdoor environments and is rated for intermittent 100% RH conditions up to 50°C; water level sensor and cable are waterproof
Measurements: Absolute Pressure, Barometric Pressure, Differential Pressure, Temperature, Water Level and Water Temperature
Operation Range: 0 to 207 kPa (0 to 30 psia); approximately 0 to 9 m (0 to 30 ft) of water depth at sea level, or 0 to 12 m (0 to 40 ft) of water at 3,000 m (10,000 ft) of altitude
Factory Calibrated Range: 69 to 207 kPa (10 to 30 psia), 0° to 40°C (32° to 104°F)
Burst Pressure: 310 kPa (45 psia) or 18 m (60 ft) depth
Water Level Accuracy: Typical error: ±0.05% FS, 0.5 cm (0.015 ft) water; Maximum error: ±0.1% FS, 1.0 cm (0.03 ft) water
Raw Pressure Accuracy: ±0.3% FS, 0.62 kPa (0.09 psi) maximum error
Resolution: <0.02 kPa (0.003 psi), 0.21 cm (0.007 ft) water
Pressure Response Time (90%): 1 second at a stable temperature