The datalogger Gealog micro is especially suited for all applications requiring high reliable registration of water level and water temperature made under very harsh environmental conditions.

It is proper for being installed into ground water pipes with diameters from 2 inch onwards. The water level is measured by a pressure probe, the water temperature by an integrated temperature sensor. The complete data logger electronics is installed in the submersible, watertigth housing.

The Gealog micro can be easily fixed onto ground water pipes by means of a hanging appliance, where the waterproof plug connector is also installed. The Gealog micro is operated by using a notebook-PC (via serial interface). The Gealog micro is powered by integrated Batteries, which guarantee the operation up to several years (depending on measuring rate) without changing batteries.

Measuring parameters/precision

• Water level:
• Sensor element:
  - State of the art piezo resistive silicon cell
  - Silicon oil filling between membrane and sensor element.
  - Sensor resistors on ceramic substrate.
  - Temperature compensated
  - Sensor membrane made of stainless steel
  - Capillary tube for air pressure compensation
• Measuring ranges: 70 cm, 3 m, 10 m, 20 m, 30 m or 70 m
  - Please select the necessary measuring range which corresponds to the expected maximum variations of the water level at the measuring site.
  - Resolution: 12 Bit
  - Linearity error: ± 0.1% full scale
• Tolerable overpressure: 3 x measuring range or 8 bar
  - Long term stability better than 0.1%/ year
• Water temperature:
  - Sensor element: NTC-thermistor
  - Measuring range: -5°C up to 45°C
  - Uncertainty: 0.2°C