U20-001-04-Ti Titanium Water Level/Temperature Logger (4m/13ft)

• Lightning protection - no long signal wires, and electronics are shielded in stainless steel housing
• HOBOware Pro software provides easy conversion to accurate water level reading, fully compensated for barometric pressure, temperature, and water density.
• Multiple-rate sampling allows faster sampling at critical times such as when pumping starts or stops.
• Available in 4 depth ranges
• Ideal for use in wells, streams, lakes, wetlands and tidal areas
• No-vent-tube design for easy reliable deployment
• Available in stainless and titanium versions
• Durable ceramic pressure sensor

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), 0C to 40C
• 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 sensor

 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%

Temperature Sensor

• Operation range: -20° to 50°C
• Accuracy: 0.37°C at 20°C
• Resolution: 0.1°C at 20°C (10-bit)
• Response time (90%): 3.5 minutes in water (typical)
• Stability (drift): 0.1°C per year

Logger

• Real-time clock: 1 minute per month 0 to 50C
• 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 diameter, 15 cm length; mounting hole 6.3 mm diameter
• Weight: Approximately 140 g
• Wetted materials: Titanium, 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.

U20 Series Water Level Data Loggers

Include:

• Sea Level Monitoring
• Climate studies
• Ocean ecology
• Storm water impact
• Wetlands restoration
• Environmental impact