Extech EC400 - Exstik Conductivity Meter

  • Simultaneous measurement of conductivity, TDS, salinity and temperature
  • Interchangeable cell constants
  • Power-up self-calibration
  • IP57 rating & floats if dropped in water
£111.26 £92.72

Availability: Usually 1-3 weeks

Product Code

The EC400 incorporates the latest microprocessor chip and patented sensor technologies to enable simultaneous measurement of Conductivity, TDS, Salinity, and Temperature. It also provides the flexibility of interchangeable cell constants, making testing fast, accurate, and repeatable. The EC400 is also waterproof to IP57, making it suitable for use in wet environments, and it floats if dropped in water.


  • Wastewater and drinking water analysis
  • Environmental tests to determine the health of ponds, streams, wells, and other bodies of water
  • Manufacturing processes such as component or PCB rinsing

The Extech EC400 ExStik® has six measurement units, an internal memory that stores up to 15 labeled readings for easy recall, an adjustable conductivity to TDS ratio factor ranging from 0.4 to 1.0, and self-calibration upon power up. The EC400 uses cutting-edge microprocessor chip technology and patented sensor technology to measure conductivity, TDS, salinity, and temperature all at the same time. The EC400 gives you the flexibility of interchangeable cell constants at the touch of a button, making testing fast, accurate, and repeatable. Includes meter and conductivity cell, protective cap, sample cup, four CR2032 batteries, and a 48" (1.2m) neckstrap.


  • Conductivity: 0 to 199.9µS, 200 to 1999µS, 2.00 to 19.99mS
  • TDS/Salinity/Fluoride: TDS/Salinity: 0 to 99.9ppm (mg/L), 100 to 999ppm (mg/L), 1.00 to 9.99ppt (g/L)
  • Temperature: 32° to 149°F (0 to 65°C)
  • Max. Resolution: 0.1µS, 0.1ppm (mg/L), 0.01pH, 0.1°F/°C
  • Basic Accuracy: ±2%FS, ±0.01pH, ±1.8°F/1°C
  • Dimensions: 1.4x6.8x1.6" (35.6x172.7x40.6mm)
  • Weight: 3.8oz (110g)
More Information
Manufacturer Extech
Manufacturer Part Number EC400
GTIN 0793950054000
Manual Download
Datasheet Download
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