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DTK Water

SD30 EC

The SD30 EC Pocket Tester provides a reliable and convenient solution for measuring conductivity, salinity and total dissolved solids (TDS) in the field. Designed for fast and accurate water quality testing, it is ideal for applications including industrial water systems, swimming pools, water treatment and routine monitoring where multiple parameters are required.

With its waterproof IP67-rated housing, the SD30 is built for dependable performance in demanding environments. Its compact and portable design allows users to carry out measurements wherever testing is required, while the intuitive interface and clear display make operation simple and efficient.


The transparent protective lid provides protection during storage and transport while also creating a stable stand during measurement. It also improves access for electrode maintenance, helping maintain long-term performance and reliability of the tester.


The SD30 features a three-colour backlit LCD display with clear visual indicators for measurement, calibration and alarm status. Blue indicates measurement mode, green indicates calibration mode and red highlights alarm conditions, allowing users to quickly understand the status of the instrument.


Powered by energy-efficient LED technology and 4 x AAA batteries, the SD30 provides over 2000 hours of battery life. With automatic temperature compensation, multiple calibration options and included carrying accessories, it provides a practical solution for professional water testing applications.

Key Features

  • Measures conductivity, salinity and TDS
  • Waterproof IP67 housing for reliable field use
  • Compact and portable design
  • Transparent lid for protection, maintenance and stable positioning
  • Three-colour backlit LCD display:
    • Blue: Measurement mode
    • Green: Calibration mode
    • Red: Alarm indication
  • Automatic temperature compensation
  • Auto-hold and stability indicator functions
  • Multiple calibration options for accurate measurements
  • Alarm limit settings
  • Over 2000 hours battery life
  • CE compliant

Applications

  • Boiler Water
  • Cooling Water
  • Drinking Water Treatment
  • Pool Water Control
  • Wastewater Treatment

Technical Data

  • Measurement Parameters:
    • Conductivity: 0.01 – 20.00 mS/cm
    • Salinity: 0.01 – 10 g/L
    • TDS: 0.01 – 20.00 ppt
    • Temperature: 0 – 50 °C
  • Accuracy:
    • Conductivity / TDS / Salinity: ±1% FS
    • Temperature: ±0.5 °C
  • Resolution:
    • Conductivity: Auto scale 0.1 µS/cm, 1 µS/cm, 0.01 mS/cm
    • TDS: Auto scale 0.1 ppm, 1 ppm, 0.01 ppt
    • Salinity: 0.01 ppt
    • Temperature: 0.1 °C
  • Calibration:
    • 1 or 2 point calibration (automatic mode)
    • Standard solutions: 1413 µS/cm or 12.88 mS/cm
    • Manual calibration adjustment: ±50%
  • Buffer Recognition:
    • Conductivity: 84 µS/cm / 1413 µS/cm / 12 mS/cm
  • Temperature Compensation: Automatic
  • Calibration Indicator: Yes
  • Stability Indicator: Yes
  • Auto-Hold Function: Yes
  • Alarm Limits: Yes
  • Display: 3-colour backlit LCD
  • Auto-Off: Yes
  • Power Supply: 4 x AAA batteries
  • Battery Life: >2000 hours
  • Operating Conditions: 0 – 60 °C / 0 – 80% relative humidity (non-condensing)
  • IP Rating: IP67
  • Compliance: CE
  • Dimensions: 40 x 40 x 180 mm
  • Weight: 151 g

   Order Code   Description 
720030SD30 EC Pocket Tester
 720035SD30 EC Replacement Electrode 

SD Series Leaflet