• Water level recorder

Water level recorder

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The WL16, Water Level Logger, is a datalogger and submersible pressure transducer combination designed for remote monitoring and recording of water level or pressure data


• Easy to operate and install
• Four sample modes: 10 times per second, interval, logarithmic, and exception
• PDA software simplifies field data collection
• USB and Serial communication options available
• Serial version is telemetry compatible
• No need to remove sensor for data collection or battery change
• Highly accurate water level measurements
• User programmable start and stop alarms, engineering units, and field calibration setup
• Unique 0-3’ range for shallow water
• Wet-wet transducer eliminates vent tube concerns
• Automatic barometric pressure and temperature compensation


Groundwater Monitoring, River/Stream Flow Studies, Lake/Pond Level Analysis, Flood Level Recording, Irrigation Canals, Infiltration/Inflow Studies, Wetland/Estuary Monitoring, Weirs and Flumes, Wave and Tidal Analysis, and MUCH MORE...


The WL16, Water Level Logger, is a datalogger and submersible pressure transducer combination designed for remote monitoring and recording of water level or pressure data. The water level logger can record over 81,000 readings and has four unique recording options, fast (10 samples per second),programmable interval (1 second to multiple years),logarithmic, and exception. Multiple depth ranges are available from 3’ to 500’ of water level change. A 25' vented cable is standard, and optional cable lengths are available from the factory up to 500'. The WL16, Water Level Logger, is housed in a weather-resistant cylindrical enclosure, which slips inside a standard 2-inch PVC pipe. The WL16 is easily adapted with standard hardware for wellhead mounting, stream, or other installations.

Two internal 9 VDC Lithium batteries will typically power the WL16 for approximately one year even if one of the batteries fails. A third onboard battery ensures your data in the event both 9V batteries fail. The WL16 includes Windows and PDA software, allowing easy upload of data to a laptop, desktop or PDA for transfer to spreadsheet programs.The WL16, Water Level Logger's vented submersible pressure transducer is fully encapsulated with marinegrade epoxy. The electronics are encapsulated so that moisture can never leak in through O-ring seals or work its way into the vent tube and cause drift or sensor failure, as is the case with many other vented sensors. The vent tube is sealed directly to the wet-wet sensing element, and any moisture that may enter the vent tube from the housing will only contact the ceramic parts, not the electronics.

Most federal agencies, universities, and environmental consultants recommend vented water level sensors for the best monitoring results. The vented submersible pressure transducer uses a unique silicon diaphragm to interface between your water and the sensing element. The diaphragm is highly flexible and touches the sensing element, producing a sensor with exceptional linearity and very low hysteresis. A stainless steel micro-screen cap protects the pressure transducer diaphragm. The micro-screen cap has hundreds of openings, making fouling the sensor with silt, mud or sludge virtually impossible.



Pressure Transducer
Sensor Element Silicone Diaphragm, Wet/Wet Transducer
Ranges0-3', 15', 30', 60', 120', 250', 500’
Overpressure Not to exceed 2 x full scale range
Accuracy 0.1% of full scale at constant temperature, 0.2% over 35°F to 70°F range
Compensation Uses dynamic temperature compensation 30-70 F. Automatic barometric pressure compensation
Housing up to 7” long x 13/16" diameter (small enough for a 1" well)
Materials Stainless steel housing and microscreen (hundreds of holes prevent fouling),electronics are fully encapsulated in marine grade epoxy, guaranteed not to leak
Vented Cable
Conductors 4 each 22 AWG
Material Marine grade polyurethane jacket, polyethylene vent tube, full foil shield
Shield Aluminum Mylar
Outside Diameter3/16
Temperature Range -22° to +185°F
Length Standard 25' (up to 500' from factory)
WL16 Data Logger
MemoryNon-volatile flash memory
Power Two 9VDC Lithium Batteries
Battery Life Up to 1 year (depending on recording intervals)
Resolution 12 bit
Moisture Protection Silicon coating (prevents damage to electronics from condensation)
Temperature-40° to +185°F
Humidity 0-95% non-condensing
Storage Capacity81,759 time and date stamped data points including battery voltage
Sample Modes High Speed (10 samples per second),Fixed Interval Programmable from 1 sec to >1 year),Logarithmic, Exception
Data Overwrite Select memory wrap or unwrap (unwrap will stop logging data once memory is full)
Clock Synchronizes to the time and date of user's computer
Clock Accuracy 0.0025% or 1 minute in 1 month
Clock Format Month/Day/Year Hour/Minute/Second
Enclosure 1 7/8" diameter x 11.5" length (fits inside a 2" well),stainless steel UV protected PVC vented for barometric pressure compensation
Weight 1.6 lbs (with battery and 25' cable)
Communication Port WL16S: RS-232 4-pin circular connector
WL16U: USB Type B
Selectable Baud Rates:
Global Water Software
Compatible with Microsoft's Windows 98, ME, 2000, NT, and XP Windows and Excel are trademarks of the Microsoft Corporation. Tabular Display/Printout Data in standard spreadsheet format (.CSV) Programmable alarm start and stop times Field calibration software included



WL16 Water Level Logger
Logger sits inside 2" well with enclosure rim on well casing top. Well cap completely hides logger. Includes PDA and Windows-based software. Water Level Range Options: 0-3', 15', 30', 60', 120', 250', and 500’. Includes 25' cable
(Specify range and total cable length upon order)
WLEXC Extra Cable
Cable length is measured from top of logger to bottom of sensor. After 25', up to 500'
(Specify total cable length upon order placement)
Temperature Output Option
0-50° C, Accuracy: 1% of reading, over 19,000 time and date stamped readings with this option.
Titanium Option
Replace the standard stainless steel water level sensor housing with titanium
Locking Well Cap
Fits over a 2-inch pipe
INO Inside Well Option
Entire logger fits inside the well. Provided with cable and hook to secure it to the well top
PRP Pressure Pipe Option
Sensor is housed in a 6" tube with 3/4" NPT male thread for logging pressure in municipal water systems. 10' cable standard. Calibrated in psi with ranges of 30 psi, 60 psi, 100 psi available.....
SWO Sewer Flow Option
Cover protects sensor from fouling and velocity effects in sewer, stormwater and irrigation pipe flows. Cover is attached to 6" X 24”' stainless steel strap for mounting sensor on pipe bottom.