Water Level Loggers Product Description
The WL16, Water Level Logger, now supports USB
cable interface for laptop and desktop data
...OR a serial communication port for use with
most popular PDAs and telemetry solutions.
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 on
all water level loggers, 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 Water Level
Recorders are easily adapted with standard hardware for
wellhead mounting, stream, or other installations. Two
internal 9 VDC Alkaline batteries will typically power
each of the Water Level Loggers for approximately one
year even if one of the batteries fails. A third
onboard lithium battery ensures your data is safe in the
event both 9V batteries fail. All Water Level Loggers
include Windows and PDA software, allowing easy upload
of data a laptop, desktop or PDA for transfer to
spreadsheet programs. NOTE: The Palm operating system
is NOT supported.
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
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.
Water Level Recorders Specifications
WL16 Water Level Data Loggers
Power: Two 9VDC Alkaline Batteries
Battery Life: Up to 1 year (depending on
Resolution: 12 bit
Moisture Protection: Protective coating (helps
prevent damage to electronics from condensation)
Temperature: -40° to +185°F
Humidity: 0-95% non-condensing
Memory: Non-volatile flash memory
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
Data Overwrite: Select memory wrap or unwrap
(unwrap will stop logging data once memory is full)
Clock: Synchronizes to the time and date of
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)
WL16S: RS-232 4-pin circular connector
WL16U: USB Type B
Selectable Baud Rates:
Certificates: CE compliant
Global Water Level Loggers Software
Compatiblity: Microsoft's Windows 98, ME, 2000,
NT, and XP
Tabular Display/Printout; data in standard
spreadsheet format (CSV)
Programmable alarm start and stop times
Field calibration software and help files included
PDA software: CE and Mobile compatible.
Water Level Logger Vented Cable
Conductors: 4 each 22 AWG
Material: Marine grade polyurethane jacket,
polyethylene vent tube, full foil shield
Shield: Aluminum Mylar
Outside Diameter: 0.306"
Temperature Range: -22° to +185°F
Length: Standard 25' (up to 500' from factory)
Submersible Pressure Transducer
Sensor Element: Silicone Diaphragm, Wet/Wet
Pressure Range: 0-3', 15', 30', 60', 120', 250',
Linearity and Hysteresis: ±0.1% FS
Warm-Up Time: 3 seconds recommended
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
Housing: Up to 13/16" diameter x 5-1/2" long
(2 cm dia. x 14 cm long)(small enough for a 1" well)
Material: 304L Stainless Steel, SS microscreen
(hundreds of holes to prevent fouling), electronics are
fully encapsulated in marine grade epoxy, guaranteed not
The Water Level Logger includes Global Water
Datalogger Software, Windows-based software that
provides many useful features, such as real-time
readout, measurement interval and engineering unit
selection, station ID setting, and sensor calibration.
The software makes accessing stored data and setting
options easy. Data downloaded from the Water Level
Logger can easily be opened in any PC spreadsheet
program for analysis and graphic presentation. Globlal
Water's Water Level Recorder Software will run on a
PC-type laptop or desktop computer running Windows 98 or
later. To communicate with the Water Level Logger, a
computer must be equipped with a communication port
appropriate to the type of water level logger you have,
either a standard RS232 serial or a USB host
communication port. Purchase of the Water Level Logger
includes a RS232 or USB cable (for communication between
the logger and your computer).
The Water Level Logger's pressure sensor may be
placed slightly below the lowest expected water level.
Level ranges of 0-3', 0-15', 0-30', 0-60', 0-120',
0-250', and 0-500' are available. When ordering, select
the level sensor range that will cover the maximum water
level change (this is not necessarily the total depth of
water). Selecting the smallest water level range
possible will ensure the greatest accuracy.
The Water Level Logger's data logger is housed in an
enclosure that is designed to slip inside a 2-inch pipe
and be completely hidden with a standard or locking well
cap. For monitoring groundwater, the water level
recorders can be installed in a PVC pipe with the
datalogger enclosure's rim resting on the pipe's edge.
For monitoring surface water, the water level loggers
can be installed in a a protective stilling constructed
of PVC pipe.
Water Level Loggers Applications
Groundwater Monitoring, stream and river gauging,
Lake/Pond Level Analysis, Flood Level Recording,
Irrigation Canals, inflow and infiltration studies,
Wetland/Estuary Monitoring, Weirs and Flumes, Wave and
Tidal Analysis, and MUCH MORE... NOTE:
Polyurethane cable is not recommended for use with
hydrocarbons or high concentrations of chlorine. Please
look at the our WL450
Water Level Transmitter to meet the requirements of
these types of applications.
Water Level Logger Options
WL16S Water Level Logger
SERIAL version for collecting data with most PDAs.
Allows water level logger to sit inside 2-inch well
with the water level recorder's enclosure rim
resting on well casing top. Standard or locking
well cap will completely hide the water level
logger. Includes Windows-based Global Water Level
logger Software and two 9V batteries. When
ordering, specify water level range that will cover
the maximum water level change for your application
(this is not necessarily the total depth of
water): 0-3', 0-15', 0-30', 0-60', 0-120', 0-250',
and 0-500'. NOTE: There is a $50 extra charge for
0-500' range sensor. Selecting the smallest water
level range possible will ensure the greatest
accuracy. Includes 25 feet of cable.
WL16U Water Level Logger
USB version for collecting data with most
laptop/desktop computers. Allows water level logger
to sit inside 2-inch well with the water level
recorder's enclosure rim resting on well casing
top. Standard or locking well cap will completely
hide the water level logger. Includes Windows-based
Global Water Level logger Software and two 9V
batteries. When ordering, specify water level range
that will cover the maximum water level change for
your application (this is not necessarily the total
depth of water): 0-3', 0-15', 0-30', 0-60', 0-120',
0-250', and 0-500'. NOTE: There is a $50 extra
charge for 0-500' range sensor. Selecting the
smallest water level range possible will ensure the
greatest accuracy. Includes 25 feet of cable.
WLEXC Extra Water Level Logger Cable
Cable length is measured from top of water level
recorder to bottom of sensor. WL16 includes 25 feet
of cable, and extra cable can be added up to 500
Replace the standard stainless steel water level
sensor housing with titanium.
Locking Well Cap
Fits over a 2-inch pipe.
PDAWL16 Deluxe PDA Package
Handheld PDA download package for WL16. Standard
PDA can read data from 24 full water level loggers
before running out of memory. NOTE: PDAs WILL NOT
INTERFACE WITH GLOBAL WATER DATALOGGERS WITHOUT A
CUSTOM SERIAL CABLE (Serial cable is included with
WL-INO Inside Well Option
Entire logger goes down inside the 2" well.
Provided with chain and hook to secure the well
top. Global Water recommends that no more than
100ft of cable be used with this option.
PRPP/PRPM Pressure Pipe Option
Sensor is housed in a 8" PVC (PRPP) or stainless
steel pipe with 3/4" NPT male thread (PRPM) for
logging pressure in municipal water systems. 10'
cable standard. Calibrated in psi with ranges of 30
psi, 60 psi, 100 psi available.
WL-SWO Sewer Flow Option
Mouse-shaped cover protects sensor from fouling and
velocity effects in sewer, stormwater and irrigation
pipe flows. The cover is attached to 4" X 24"
stainless steel strap for mounting the level sensor
on pipe bottom.
WL-T Temperature Output Option
0-50° C, Accuracy: 1% of reading. NOTE: This option
does not decrease the storage capacity of the water
RM100 Remote Radio Telemetry System
Water Level Sensor
When ordering, specify water level range that will
cover the maximum water level change for your
application (this is not necessarily the total depth
of water): 0-3', 0-15', 0-30', 0-60', 0-120',
0-250', 0-500'. Selecting the smallest water level
range possible will ensure the greatest accuracy.
Includes 25 feet of cable.
WL430 Sewage Lift Station Wastewater Level Sensor
Includes 40' of cable
Water Level Sounder
For more information on our tape sounders please
visit our WL500 Water Level Sounder page.
WL600 Sonic Water Level Meter
WL700 Ultrasonic Water Level Sensor
Specify Water Level Range: 1', 3', 6'. Includes 10'
The Water Flow Logger revolutionizes flow data
collection for applications such as inflow &
infiltration studies, stormwater and wastewater
collection systems, open channels and a host of
other gravity flow systems.
GL500-Mod Modem and adapter cable kit
NOTE: Only works with serial version of Water Level