WL16 Water Level Logger

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 1m to 150m of water level change. A 7m vented cable is standard, and optional cable lengths are available from the factory up
to 150m. 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 government 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.

Specifications;

Sensor Element: Silicone Diaphragm, Wet/Wet Transducer
Overpressure: Not to exceed 2 x full scale range
Accuracy: 0.1% of full scale at constant temperature, 0.2% over 2°C - 21°C
Compensation: Uses dynamic temperature compensation 2-21 °C.
Automatic barometric pressure compensation
Housing: up to 18cm long x 2cm 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
Material: Marine grade polyurethane jacket, polyethylene vent tube,
Memory: Non-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 +85°C
Humidity: 0-95% non-condensing
Storage Capacity: 81,759 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
Clock Accuracy: 0.0025% or 1 minute in 1 month
Clock Format: Month/Day/Year Hour/Minute/Second
Enclosure: 5 cm diameter x 30cm length (fits inside a 2" well), stainless steel UV protected PVC vented for barometric pressure compensation
Weight: 0.75Kg (with battery and 8m cable)
Communication Port: WL16S: RS-232 4-pin circular connector
WL16U: USB Type B
Selectable Baud Rates:
9600,19200,28800,38400,57600,115200