The Onset HOBO U20L-04 Water Level Data Logger is a low-cost, research-grade instrument for continuously measuring water level and temperature in a wide range (up to 13 feet) of underwater environments. It features 0.1% measurement accuracy, a polypropylene housing for use in both fresh and salt water, and a non-vented design for convenient and hassle-free deployment.
Note: A calibration certificate is not offered for this logger. If you require a NIST-traceable calibration certificate, please see the U20-001-04 (freshwater) or U20-001-04-Ti (saltwater) data loggers.
Note: U20L-04 data loggers require the HOBOware software (free to download) to operate. Please also note that a USB interface cable comes with the purchase of a HOBOware Pro CD (BHW-PRO-CD), only.
HOBOware Pro software provides easy conversion to accurate water level reading, fully compensated for barometric pressure, temperature, and water density
Environments: The U20L-04 Data Logger is for use in Outdoor and Underwater environments
Measurements: Temperature, Barometric Pressure, Water Level
Range: 0 to 145 kPa (0 to 21 psia); approximately 0 to 4m (0 to 13') of water depth at sea level, or 0 to 7m (0 to 23') of water at 3,000m (10,000') of altitude
Accuracy: Typical error: ±0.1% FS, 0.4cm (0.013') water
Maximum error: ±0.2% FS, 0.8cm (0.026') water
Specifications
(1) OBO U20L-04 Water Level Data Logger (13-foot depth)
Required Items:
Coupler (COUPLER2-C) withUSB Optic Base Station (BASEU-4)
HOBO Waterproof Shuttle(U-DTW-1, firmware version3.2.0 or later)*