Pressure Sensor Operation range: 0 to 145 kPa (0 to 21 psia); approximately 0 to 4 m (0 to 13 ft) of water depth at sea level, or 0 to 7 m (0 to 23 ft) of water at 3,000 m (10,000 ft) of altitude Factory calibrated range: 69 to 145 kPa (10 to 21 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 - 0.075% FS, 0.3 cm (0.01 ft) water Maximum error: - 0.15% FS, 0.6 cm (0.02 ft) water Raw pressure accuracy:** 0.3% FS, 0.43 kPa (0.063 psi) maximum error Resolution: < 0.014 kPa (0.002 psi), 0.14 cm (0.005 ft) water Pressure response time 90%: < 1 second Thermal response time (90%): † Approximately 10 minutes in water to achieve full temperature compensation of the pressure sensorTemperature Sensor Operation range: -20° to 50°C (-4° to 122°F) Accuracy: 0.37°C at 20°C (0.67°F at 68°F) Resolution: 0.1°C at 20°C (0.18°F at 68°F) (10-bit) Response time (90%): 3.5 minutes in water (typical) Stability (drift): 0.1°C (0.18°F) per yearLogger Real-time clock: ± 1 minute per month 0° to 50°C (32° to 122°F) Battery: 2/3 AA, 3.6 Volt Lithium, factory-replaceable Battery life (typical use): 5 years with 1 minute or greater logging interval Memory (non-volatile): 64K bytes memory (approx. 21,700 pressure and temperature samples) Dimensions: 2.46 cm (0.97 inches) diameter, 15 cm (5.9 inches) length; mounting hole 6.3 mm (0.25 inches) diameter Weight: Approximately 210 g (7.4 oz) Wetted materials: 316 stainless steel, Viton® o-rings, acetyl cap, ceramic sensor Shock/drop: Logger is sensitive to shocks. Handle with care and avoid any impact. Always use proper packaging when shipping the logger. Logging interval: Fixed-rate or multiple logging intervals, with up to 8 user-defined logging intervals and durations; logging intervals from 1 second to 18 hours. Refer to HOBOware software manual. Launch modes: Immediate start and delayed start Offload modes: Offload while logging; stop and offload Battery indication: Battery voltage can be viewed in status screen and optionally logged in datafile. Low battery indication in datafile. Environmental Rating: IP68The CE Marking identifies this product as complying with the relevant directives in the European Union (EU).* With accurate reference water level measurement and Barometric Compensation Assistant data ** Absolute pressure sensor accuracy includes all pressure drift, temperature, and hysteresis-induced errors† Maximum error due to rapid thermal changes is approximately 0.5%