Specification :

Design
The design is quite simple. The basic parts could be assembled and disassembled without any extra tools.
Moreover, operating the WQL-pH is effortless and timesaving. The robust stainless steel logger provides
reliable protection and guarantees trouble-free measurements. For logger fixation the included shackle can
be used. The shackle size matches the logger diameter.

Huge memory space
Flash memory for up to 600, 000 data records – measurements over a long period of time depending on the
interval. Exceeded memory with an interval of ( e.g.) :
• 1 s after 7 days
• 30 s after 11 months
Safe data storage
Logged data is persistent, also in case of a power failure
Detailed data recording
Recorded are: pH, temperature, date/ time and data logger ID number

Powerful battery
Guaranteed long service life due to a powerful 3.6 V Lithium battery
Low energy consumption
Extended battery runtime via intelligent energy management
Easy battery change
Simple access to the battery case - no extra tools needed

Stable electrode, long calibration intervals
Special design with polymer reference electrolyte – allows
long term measurements with high precision
Robust design
Wide application range: applicable up to 10 bar and 328 ft
( 100 m) depth ( IP 68)
Compensated measurement
pH electrode SensoLyt® WQL with a integrated
temperature sensor for precise results
Electrode assembly
Safe and fast removal and installation – easy to change
without major effort

Easy operation and setup
User friendly interface with clearly laid out configuration menu
Convenient data analysis
Graphic or tabular presentation of results. Data exports to other software programs ( e.g. Excel) via CSVformat
Calibration
Clearly arranged menu navigation:
fast and safe calibration – 1 point
or 2 point calibration

Calibration
Clearly arranged menu navigation:
fast and safe calibration – 1 point
or 2 point calibration
Calibration record
Important part of quality assurance
– calibration record

Logging job
Easy setup ( logging
job) :
• Interval
• Start
• Stop
• Measurement-ID
Data query
Convenient data
retrieval via data base
query

Applications
Monitoring of water resources has become a global challenge with high priority.
Therefore innovative measuring technology is absolutely essential. Typical
applications for WQL-pH are characterized by reliable and huge series of
measurements at multiple measuring points that are difficult to access. In general
these measurements take place over a long period of time.
The data Logger WQL-pH is applicable for usage in ground and surface water as
well as in drinking and waste water.
Wide application range of WQL-pH:
• Watershed and wells
• Rivers, lakes
• Landfill runoff
• Construction and restoration projects
• Pump stations
• Diggings and boreholes
• Applied limnology
Measuring range * * 0.000 ... + 20.000
Resolution 0.001
Accuracy * * d 0.005 ± 1 digit