The DCT430SD is a general-purpose handheld instrument suitable for measuring the conductivity of a solution or its total dissolved solids (TDS) or salt content. The meter also measures the solution’s temperature.
The meter has four automatically switched full-scale ranges of conductivity measurement: 200 uS (microSiemens), 2 mS (milliSiemens), 20 mS and 200 mS. It also has four automatically switched ranges of TDS measurement: 200 ppm, 2,000 ppm, 20,000 ppm and 100,000 ppm. Salt content of up to 12% by weight also can be measured.
Among the applications suitable for the DCT430SD are water conditioning, wastewater monitoring, beverage production, aquaculture (fish farming), aquariums, pulp and paper processing, electroplating, and photography.
The DCT430SD has the performance and features needed to satisfy the most demanding aspects of the above applications. A front-panel pushbutton enables rapid switching among the three measurement modes. Measurement accuracies are ± 2% of full-scale reading + 1 digit for conductivity and TDS; ± 0.8ºC/± 1.5ºF for temperature, and ±0.5% of the value for salt. The supplied carbon rod electrode conductivity/TDS/salt probe can be calibrated using standard solutions for any of three full-scale measurement ranges. All three standard solutions are available from General as optional accessories.
Because it is microprocessor-based, the DCT430SD can make full use of the portability, reliability and large storage capacities that SD memory cards offer. Measurements can be made automatically at any sampling rate between one second and nine hours. After time-stamping and storing the measurements on an SD card plugged into the instrument (a process called datalogging), the user can remove the card and plug it into to a laptop or desktop computer either directly or via a USB card reader. The data logs are stored on the card as files with the .xls extension, which can be opened by Microsoft’s Excel application.