HOBO Bluetooth Water Level Data Loggers

A low-cost, research-grade data logger with Bluetooth data offload to continuously monitor water level and temperature. Measures at depths of up to 13, 30 or 100 feet in a wide range of underwater environments, both freshwater and saltwater.

• Self-contained, non-vented design enables easy deployment
• Ideal for use in both freshwater and saltwater environments, including wells, streams, lakes, wetlands, and tidal areas
• Depth measurement options of up to 13, 30 or 100 feet depending on model
• Durable ceramic pressure sensor withstands freezing
• Streamlined data offload via Bluetooth to the free HOBOconnect app
• HOBOconnect app provides easy extraction and visualization of water level data
• Extended battery life up to 10 years (power-saving mode requires magnetic fob to activate Bluetooth for data down load

Integrating Bluetooth for fast and reliable data download, the bluetooth water level logger eliminates the need to plug your logger into a base station or shuttle to offload data in the field, ensuring continuous water level and temperature monitoring. With options to measure at depth ranges of 13, 30 or 100 feet in a wide range of underwater environments, this rugged logger features 0.1% measurement accuracy, a durable polypropylene housing for use in both freshwater and saltwater, and a non-vented design for convenient and reliable deployment.

The Bluetooth water level logger comes with a magnetic activation fob that can ‘wake up’ the logger to activate its Bluetooth communication for configuration and data download. The included fob comes with a lanyard to prevent losing or dropping the fob in the field.

This logger records absolute pressure, which is later converted to water level readings by our HOBOconnect app. To compensate for barometric pressure changes, you can use another Bluetooth water level logger as a barometric reference.

Pressure response time (90%): <1 second at a stable temperature; Measurement accuracy also depends on temperature response time; Changes in temperature allow 20 minutes in water to achieve full temperature compensation of the pressure sensor; Maximum error due to rapid thermal changes is approximately 0.5%.

Logger (All models):

Dimensions: Ø 3.18 cm (1.25"), 15.24 cm (6.0") length; mounting hole Ø 6.3 mm (0.25")

Wireless standard: Bluetooth 5 LE

Radio power: 1 mW (0 dBm)

Real time clock: ±1 min. per month 0 to 50 °C (32 to 122 °F)

Data download time (with Bluetooth 5+ devices: Approximately 3.5 min.; 100000 measurements < 1 min.

Wetted materials: Polypropylene housing and lanyard; Viton and Buna-N O-rings; ceramic sensor in acetal end cap; stainless steel screws suitable for saltwater

Logging modes: Fixed-interval (normal or statistics), burst or multiple intervals with up to 8 user-defined intervals and durations; logging intervals from 1 second to 18 hours; Refer to the HOBOconnect User’s Guide for details

Start modes: Immediate, next interval, date and time, button start (fob or app)

Pause: Pause and restart with HOBOconnect app

Environmental rating: IP 68

Stability (drift): 0.1 °C per year (0.18 °F per year)

Pressure (Absolute) and water level measurements: Bluetooth water level logger 13 ft. (470362-870)

Operation range: 0 to 145 kPa (0 to 21 psia); approximately 0 to 4 m (0 to 13 ft. (470362-870)) of water depth at sea level, or 0 to 7 m (0 to 23 ft.) of water at 3000 m (10000 ft.) of altitude

Factory calibration 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: ±0.1% FS, 0.4 cm (0.013 ft.) Water; Maximum error: ±0.2% FS, 0.8 cm (0.026 ft.) Water; With accurate reference water level measurement, known water density, accurate barometric compensation data, and a stable temperature environment

Raw pressure accuracy: ±0.3% FS, 0.43 kPa (0.063 psi)

Maximum error; Absolute pressure sensor accuracy includes all sensor drift, temperature, and hysteresis-induced errors

Resolution: <0.014 kPa (0.002 psi), 0.14 cm (0.005 ft.) water

Pressure (Absolute) and water level measurements: Bluetooth water level logger 30 ft, (470362-874)

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 3000 m (10000 ft.) of altitude

Factory calibrated ranged: 69 to 207 kPa, 0 to 40 °C; 10 to 30 psia, 32 to 104 °F

Burst pressure: 310 kPa or 18 m depth; 45 psia or 60 ft. depth

Water level accuracy: Typical error: ±0.1% FS, 1.0 cm (0.03 ft.) water; Maximum error: ±0.2% FS, 2.0 cm (0.06 ft.) water; With accurate reference water level measurement, known water density, accurate barometric compensation data, and a stable temperature environment

Raw pressure accuracy: ±0.3% FS, 0.62 kPa (0.09 psi) Maximum error; Absolute pressure sensor accuracy includes all sensor drift, temperature, and hysteresis-induced errors

Resolution: <0.02 kPa Water; 0.007 ft. water

Pressure (Absolute) and water level measurements: Bluetooth water level logger 100 ft. (470362-872)

Operation range: 0 to 400 kPa (0 to 58 psia); approximately 0 to 30.6 m (0 to 100 ft.) of water depth at sea level, or 0 to 33.6 m (0 to 111 ft.) of water at 3000 m (10000 ft.) of altitude

Factory calibration range: 69 to 400 kPa (10 to 58 psia), 0 to 40 °C (32 to 104 °F)

Burst pressure: 500 kPa (72.5 psia) or 40.8 m (134') depth

Water level accuracy: Typical error: ±0.1% FS, 3.0 cm (0.1 ft.) water; Maximum error: ±0.2% FS, 6.0 cm (0.2 ft.) water; With accurate reference water level measurement, known water density, accurate barometric compensation data, and a stable temperature environment

Raw pressure accuracy: ±0.3% FS, 1.20 kPa (0.17 psi) Maximum error; Absolute pressure sensor accuracy includes all sensor drift, temperature, and hysteresis-induced errors

Resolution: <0.04 kPa (0.006 psi), 0.41 cm (0.013 ft.) water

Accessories information: Magnetic activation Fob - Convenient magnetic fob 'wakes up' the bluetooth water level data logger for configuration and data download via Bluetooth communication. Small size makes these easy to take into the field. Can be used to start loggers in the field. Includes lanyard and key ring to prevent accidentally dropping or losing fob. One fob can be used with all your bluetooth water level loggers. A convenient tool for working with Bluetooth water level data loggers in the field, this magnetic fob is used to wake the bluetooth water level logger and to activate Bluetooth communication for logger configuration and data download. One fob can be used to activate any bluetooth water level logger.
U2X Protective housing - A protective enclosure for mounting Onset's HOBO U24 conductivity and HOBO U20 water level data loggers. Won't restrict flow of media around the data logger. Comes with six zip ties and mounting recommendations. Allows for easy deployment in a variety of water monitoring applications. A protective enclosure for mounting conductivity and water level data loggers. Designed to allow a data logger to be mounted in harsh environments while not restricting the flow of media around the device. Supplied with six zip ties and mounting recommendations, it allows for easy deployment in a variety of water monitoring applications.

Ordering information: Requires a compatible mobile device or Windows computer and the HOBOconnect App. A calibration certificate is not offered for this logger.

Delivery information: Includes Bluetooth water level logger and magnetic activation fob.