Van Essen TD-Diver Water Level Loggers

The Van Essen TD-Diver is a reliable instrument used for the autonomous measuring and recording of groundwater levels and temperature.


  • Compact size: 22mm diameter x 110mm length
  • Stores 72,000 records of time stamp, pressure and temperature with backup
  • Continuous and fixed length memory (linear sample method)
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Van Essen TD-Diver Water Level Loggers

The Van Essen TD-Diver is a reliable instrument for autonomous measuring and recording of groundwater level and temperature. Its internal memory of 72,000 measurements per parameter provides sufficient capacity to perform nearly one measurement every hour for 8 years. A new backup memory feature enhances data integrity. For each measurement, the Diver registers the date and time, groundwater level, and temperature.

The Van Essen TD-Diver is an easy-to-use datalogger featuring state-of-the-art electronics and a robust high-precision pressure sensor for long-term accuracy. The absolute pressure sensor requires minimal maintenance and re-calibration.


  • Monitor potable water recharge areas for water supply
  • Monitor tailing ponds, dewatering activities and water supply levels of mines
  • General site investigations for construction
  • Contaminant plume monitoring on spill sites, remediation sites, chemical storage facilities
  • Landfill sites and hazardous waste storage sites
Questions & Answers
Can this logger read water level accurately in a 1" well?
The Van Essen TD-Diver measures about 0.9 in and is good for deplyoment in 2" and 4" wells. However, if the inner diameter of the well is larger than 22cm, then the logger can be deployed without any interferences.
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Van Essen TD-Diver Water Level Loggers
TD-Diver water level & temperature logger, 10m range
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Van Essen TD-Diver Water Level Loggers
TD-Diver water level & temperature logger, 20m range
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Van Essen TD-Diver Water Level Loggers
TD-Diver water level & temperature logger, 50m range
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Van Essen TD-Diver Water Level Loggers
TD-Diver water level & temperature logger, 100m range
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