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Temperature data-logger DCX-22AA-CTD
pressurewater levelconductivity

temperature data-logger
temperature data-logger
temperature data-logger
temperature data-logger
temperature data-logger
temperature data-logger
temperature data-logger
temperature data-logger
temperature data-logger
temperature data-logger
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Characteristics

Measured quantity
temperature, pressure, water level, conductivity, depth
Connector type
RS-485
Display
without display
Applications
for monitoring
Other characteristics
programmable, with connector, digital, stand-alone
Memory capacity

114,000 unit

Description

The CTD versions of the DCX-22 range are autonomous battery-operated data collectors made of stainless steel. Requiring little maintenance, they record the water level (pressure), tempe­rature and conductivity over long periods. CTD stands for Conductivity, Temperature and Depth. This data sheet specifies the additional conductivity measurement function which distinguishes the CTD version from the standard DCX-22 product line. The pressure and temperature specifications are set out in detail in the data sheets for the DCX-22 AA and DCX-22 (SG/VG). Conductivity is increasingly being monitored in conjunction with depth measurements, in which changes in water quality and depth are required to be detected simultaneously. Thus it is possible to detect contamination caused by salt water infiltration, waterborne particles or general pollutants when measuring groundwater levels. KELLER’s Logger 5.1 programming and readout software is used to select a conductivity range (0…0.2 mS/cm, 0…2 mS/cm, 0…20 mS/cm or 0…200 mS/cm) and set the temperature coefficient for the medium. This process produces compensated conductivity measured values standardised at 25 °C DCX-22 AA CTD The DCX-22 AA CTD data collector records groundwater levels using the AA (absoluteabsolute) measurement method, whereby fluctuations in atmospheric pressure are measured and compensated for by the watertight atmospheric pressure sensor with its stainless steel diaphragm. The advantage of this measurement method is that no humidity-sensitive capillary tube is required. As well, it is not required that the DCX-22 AA CTD be removed from the immersion tube in order to extract the data.
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.