• Water Level Recorder

Water Level Recorder

  • Water resources management
  • Mining
  • Surface water

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Smart Monitoring Technology

  • Water resources management
  • Mining
  • Surface water
  • Remediation


Van Essen Instruments

offers a complete portfolio with regards to technology as well as advice in the field of groundwater monitoring networks. Reliable and accurate sensors are being combined with the latest developments in the field of wireless communication and data


visualization. Van Essen Instruments not only offers high-quality groundwater data but also solutions to manage a groundwater monitoring network more effective and efficient.

Diver-Suite

Diver-Suite from Van Essen Instruments provides a robust line of Diver dataloggers for groundwater and environmental professionals. The Diver dataloggers accurately measure and record fluctuations in groundwater levels, temperature and conductivity. 

Suitable for Any Environment

From the technologically advanced TD-Diver to the corrosion resistant CTD-Diver, Diver dataloggers are hermetically sealed to external influences. Electrical and/or environmental effects cannot affect the measurement results.

With an extended battery life up to 10 years, this translates to long-term uninterrupted service. Divers can be used from 300 meters below to 5,000 meters above sea level without the need to reprogram the datalogger.

All Divers operate from -20 to 80 °C.


Accurate Measurements

Divers monitor groundwater pressure with a typical accuracy of ±0.05% full scale range from 0 to 50 °C. The CTD-Diver is equipped with a four-electrode sensor for recording conductivity with an accuracy of ±1% of reading





TD-Diver

Superior Long-term Performance

The TD-Diver is based on an ingenious and proven concept and is acknowledged as the most reliable instrument for the autonomous measuring and recording of groundwater level and temperature. Its internal working memory of 72,000 measurements per parameter provides sufficient capacity to perform one measurement every 15 minutes for over 2 years. For each measurement, the Diver registers the date and time, groundwater level, and temperature.

  • Long-term groundwater monitoring
  • Watershed and recharge area monitoring
  • Storm water discharge






Baro-Diver

Reference of Choice

The Baro-Diver ensures that you accurately capture changes in atmospheric pressure. Conveniently priced and easy to deploy, one Baro-Diver covers a radius of up to 15 km, depending on the topography.

The Baro-Diver can also be used for measuring shallow water levels up to approximately 0.9 meter. The Baro-Diver has an internal working memory capable of storing 72,000 measurements per parameter.

For each measurement, the Baro-Diver simultaneously registers barometric pressure, air temperature, date and time.

  • Atmospheric pressure
  • Wetlands monitoring
  • Flood management




Micro-Diver

Compact Size

Measuring only 88 mm in length and 18 mm in diameter, the Micro-Diver is the smallest Diver capable of accurately recording groundwater levels and temperature. The Micro-Diver is specifically designed for monitoring wells or drive-points too small to

accommodate larger dataloggers. In addition to its compact size, the MicroDiver’s memory capacity can store up to 48,000 measurements per parameter - almost one measurement every ten minutes for an entire year. 

  • Engineering and construction
  • Shallow water monitoring
  • Aquifer characterization





Cera-Diver

Corrosion Proof

Monitoring groundwater under potentially corrosive conditions, such as brackish water and seawater, requires a robust and durable datalogger. The ceramic-shelled Cera-Diver is designed specifically for such environments. This highly reliable and compact Diver measures groundwater levels with a typical accuracy of ±0.05% full scale. The Cera-Diver is equipped with a memory for 48,000 measurements per parameter.

  • Estuary monitoring
  • Heap leach
  • Underground plume monitoring





CTD-Diver

3 Parameters in 1 Housing

Where there is a need to monitor groundwater levels and saltwater intrusion, injected wastewater, or contamination from chemical discharges and landfill sites, the CTD-Diver with its rugged, corrosion proof

ceramic housing, is the instrument of choice.The CTD-Diver is equipped with a four-electrode conductivity sensor that measures electrical conductivity from 0 to 120 mS/cm. There are two options for measuring conductivity: true or specific conductivity at 25 °C. Additionally, pressure and temperature are measured and recorded.

  • Mine tailings
  • Pollution monitoring
  • Water quality monitoring



      Diver Data Management Software

      User-friendly applications for your Desktop or Handheld PC


      Diver-Office Premium

      Diver-Office Premium* software provides users with a full range of tools for management of well location details, displaying borehole lithology and well construction data, plotting time-varying Diver data (groundwater elevation, temperature, conductivity),and validating data quality in a seamlessly integrated groundwater software package.

      • Diver Data Management - Program Diver dataloggers, start/stop Divers and download Diver data to a shared SQL database.
      • Monitoring Well Data Management - Create, modify and display X, Y location data, borehole lithology and well construction details.
      • Shared Database - Securely share Diver data over a network and collaborate with all team members in your groundwater monitoring projects.
      • Expanded Data Options - Capture a full range of environmental variables affecting groundwater recharge including precipitation, evaporation, and discharge data.
      • QA/QC and Statistics - Apply essential QA/QC checks to raw data, identify and correct data anomalies, and gain confidence in your data assessments.
      • Report Automation - Effectively communicate and present monitoring data, location details, well construction data and lithology in detailed reports and customized time series plots.
      • Data Flexibility - Export well profiles to image files, export time-series data to ExcelTM, import location data from ExcelTM/AccessTM.


        Create detailed time-series plots


        Report on well construction and lithology


        Diver-Pocket

        Built for your Handheld PC or PDA, the Diver-Pocket* software reads data stored in Diver dataloggers, displays time-series plots, and exports data to various formats.

        Diver-Pocket Premium

        The Diver-Pocket Premium* software extends the features of Diver-Pocket, with the added capability to program Divers, including the measurement method, frequency, and the start date/time.

        Diver-Office

        Use the Diver-Office* desktop application to calibrate, read, and program all Divers in the Diver-Suite. Download measurements onto your PC, view time series data in a plot or tabular form, and export data to a spreadsheet or groundwater modeling program.


        * Typical accuracy 1 Only available with CTD-Diver.  Baro-Diver: -10°C to 50°C
         

        Dimensions (LxD)110 mm × 22 mm
        Memory72,000 measurements with backup; continuous and fixed length memory
        Wetted partsHousingStainless steel (316L)
        O-RingsViton ®
        Pressure sensorpiezoresistive ceramic
        Cap / Nose coneNylon PA6 30% glass fiber / ABS
        Battery lifeup to 10 years (dependent on usage)
        Sample interval0.5 second to 99 hours
        Sample methodsfixed
        Mass104 grams
        Temperature 
        Range-20 to 80 °C
        Calibrated0 to 50 °C
        Accuracy*±0.1°C
        Resolution0.01°C
        Pressure 
        Part numberDI 801DI 802DI 805DI 810
        Range10 20 50100 mH2O
        Accuracy*±0.5 ±1.0 ±2.5 ±5.0 cmH2O
        Resolution0.6 0.09 0.19 0.36 cmH2O

        * Typical accuracy

        Dimensions (LxD)88 mm × 18 mm
        Memory48,000 measurements with backup; continuous and fixed length memory
        Wetted partsHousingStainless steel (316L)
        O-RingsViton ®
        Pressure sensorpiezoresistive ceramic
        Cap / Nose coneNylon PA6 30% glass fiber / ABS
        Battery lifeup to 10 years (dependent on usage)
        Sample interval0.5 second to 99 hours
        Sample methodsfixed, event dependent, averaging, and pumping test
        Mass45 grams
        Temperature
        Range / compensated-20 to 80 °C
        Calibrated0 to 50 °C
        Accuracy±0.1°C
        Resolution0.01°C
        Pressure
        Part numberDI 601DI 602DI 605DI 610
        Range10 20 50 100 mH2O
        Accuracy*±1.0 ±2.0 ±5.0±10.0 cmH2O
        Resolution0.060.090.190.36 cmH2O

        * Typical accuracy

        Dimensions (LxD)90 mm × 90 mm
        Memory48,000 measurements
        Wetted partsHousingCeramic (ZrO2)
        O-RingsViton ®
        Pressure sensorpiezoresistive ceramic
        Cap / Nose coneNylon PA6 30% glass fiber / ABS
        Battery lifeup to 10 years (dependent on usage)
        Sample interval0.5 second to 99 hours
        Sample methodsfixed, event dependent, averaging, and pumping test
        Mass50 grams
        Temperature 
        Calibrated-20 to 80 °C
        Range0 to 50 °C
        Accuracy*±0.1°C
        Resolution0.01°C
        Pressure 
        Part numberDI 701DI 702DI 705DI 710
        Range102050100 mH2O
        Accuracy*±0.5 ±1.0±2.5 ±5.0 cmH2O
        Resolution0.060.090.190.36 cmH2O

        * Typical accuracy

        Dimensions (LxD) 135 mm × 22 mm
        Memory48,000 measurements with backup; continuous and fixed length memory
        Wetted partsHousingCeramic (ZrO2)
        Conductivity sensor housingCeramic (ZrO2)
        Conductivity sensorPlatinum electrodes on ceramic (Al2O3) carrier
        O-RingsViton ®
        Pressure sensorpiezoresistive ceramic
        Cap / Nose coneNylon PA6 30% glass fiber / ABS
        Battery lifeup to 10 years (dependent on usage)
        Sample interval1 second to 99 hours
        Sample methodsfixed, event dependent, averaging, and pumping test
        Mass95 grams
        Temperature 
        Range20 to 80 °C
        Calibrated0 to 50 °C
        Accuracy*±0.1°C
        Resolution0.01°C
        Conductivity 
        Range 10 to 120 mS/cm
        Range 20 to 30 mS/cm
        Accuracy*± 1 % of reading
        Resolution0.1 % of reading
        Pressure 
        Part numberDI 271DI 272DI 273
        Range10 50 100 mH2O
        Accuracy*±0.5 ±2.5 ±5.0 cmH2O
        Resolution0.06 0.190.36 cmH2O

        * Typical

        Dimensions (LxD)110 mm × 22 mm
        Memory72,000 measurements with backup; continuous and fixed length memory
        Wetted partsHousingStainless steel (316L)
        O-RingsViton ®
        Pressure sensorpiezoresistive ceramic
        Cap / Nose coneNylon PA6 30% glass fiber / ABS
        Battery lifeup to 10 years (dependent on usage)
        Sample interval0.5 second to 99 hours
        Sample methodsfixed
        Mass104 grams
        Temperature 
        Range-20 to 80 °C
        Calibrated-10 to 50 °C
        Accuracy*±0.1°C
        Resolution0.01°C
        Pressure 
        Part number
        DI 800
        Range1.5 mH2O
        Accuracy*±0.5 cmH2O
        Resolution0.03 cmH2O

        * Typical accuracy