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ExStik® Conductivity/TDS/Salinity Meter

Extech EC400

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The Extech EC400 ExStik® features six units of measure, internal memory that stores up to 15 labeled readings for easy recall, adjustable conductivity to TDS ratio factor from 0.4 to 1.0, and self-calibration upon power up. The EC400 incorporates the latest microprocessor chip technology and patented sensor technology to enable the simultaneous measurement of conductivity, TDS, salinity, and temperature. With the touch of a button the EC400 allows you the flexibility of interchangeable cell constants and has made the job of testing fast, accurate, and repeatable. Complete with meter and Conductivity cell, protective cap, sample cup, four CR2032 batteries, and 48"(1.2m) neckstrap.

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  • 3 Ranges of Measurements

    Autoranging meter offers 3 ranges of measurements from tap water to wastewater and any aqueous solution

  • Multi-unit Measurement

    Units of measure include µS/cm, mS/cm, ppm, ppt, mg/L, and g/L

  • Calculate the TDS Value Conveniently

    Adjustable Conductivity to TDS ratio factor from 0.4 to 1.0

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General Specifications
0 to 199.9µS/cm, 200 to 1999µS/cm, 2.00 to 19.99mS/cm
Conductivity Basic Accuracy
±2% FS
Conductivity Max Resolution
0.1µS/cm, 1µS/cm, 0.01mS/cm
0 to 99.9ppm (mg/L), 100 to 999ppm (mg/L), 1.00 to 9.99ppt (g/L)
Salinity Basic Accuracy
±2% FS
Salinity Max Resolution
0.1ppm (mg/L), 1ppm (mg/L), 0.01ppt (g/L)
0 to 99.9ppm (mg/L), 100 to 999ppm (mg/L), 1.00 to 9.99ppt (g/L)
TDS Basic Accuracy
±2% FS
TDS Max Resolution
0.1ppm (mg/L), 1ppm (mg/L), 0.01ppt (g/L)
Temperature (Contact)
32° to 149°F (0 to 65°C)
Temperature (Contact) Basic Accuracy
Temperature (Contact) Max Resolution
Additional Details
1.4 × 6.8 × 1.6" (35.6 × 172.7 × 40.6mm)
IP Rating
4 × CR-2032 (3V) button batteries
2 years
3.8oz (110g)
Related Documents
Export Restrictions

Export Restrictions

The information contained in this page pertains to products that may be subject to the International Traffic in Arms Regulations (ITAR) (22 C.F.R. Sections 120-130) or the Export Administration Regulations (EAR) (15 C.F.R. Sections 730-774) depending upon specifications for the final product; jurisdiction and classification will be provided upon request.

Extech EC400