Monitor Temperature and Water Levels with Ease

Combining high accuracy water level measurements with out-of-the-box convenience, this money-saving kit includes everything needed to start logging right away. It is ideal for monitoring water levels and temperatures in wells, streams, lakes and freshwater wetlands.

This kit includes:

• U20-001-02 HOBO logger (100′ range)
• BASE-U-4 base station with the required coupler
• BHW-PRO-USB HOBOware Pro software.

Like other HOBO Water Level Loggers, the 100-foot version offers exceptional value and ease-of-use, with no cumbersome vent tubes or desiccants to maintain.

Features

• 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 (use barometric pressure data from nearby weather station).
• Multiple-rate sampling allows faster sampling at critical times such as when pumping starts or stops.
• Available in four depth ranges
• Ideal for use in wells, streams, lakes, wetlands, and tidal areas
• No-vent-tube design for easy reliable deployment
• Durable ceramic pressure sensor

 

Pressure Sensor
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 3,000 m (10,000 ft) of altitude
Factory calibrated 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 ft) depth
Water level accuracy*	Typical error – 0.05% FS, 1.5 cm (0.05 ft) water
Maximum error	– 0.1% FS, 3 cm (0.1 ft) water
Raw pressure accuracy**	0.3% FS, 1.20 kPa (0.17 psi) maximum error
Resolution	< 0.04 kPa (0.006 psi), 0.41 cm (0.013 ft) water
Pressure responce time 90%	< 1 second
Thermal response time (90%)	Approximately 10 minutes in water to achieve full temperature compensation of the pressure sensor
Temperature 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 year
Logger
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	IP68
The 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%.

HOBOware Software

HOBOware software is used for launching, reading out, and plotting data from HOBO® data loggers. With HOBOware, you can also check logger status, filter and export data, save changes to graphs in project files, and scale data with the Linear Scaling and Pulse Scaling data assistants. There are two versions of HOBOware: HOBOware and HOBOware Pro.

Learn more about HOBOware and HOBOware-Pro Features >>