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Digital Conductivity TDS/Meter 641

Digital Conductivity TDS/Meter 641
Digital Conductivity TDS/Meter 641
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Product Code : Model 641
Product Description

Digital Conductivity TDS/Meter 641


  • Microcontroller Based
  • Measures Conductivity and TDS
  • Auto Ranging Facility
  • Auto Cell Constant Measurement
  • 3 1/2 Digit Display

EI's Digital Conductivity/TDS Meter Model 641 is an accurate test instruments for measurement of Conductivity and TDS of aqueous solutions. It uses the latest microcontroller technology to measure the Conductivity from 200μS to 1000μS and TDS from 200ppm to 1000ppt in 5 ranges respectively. The appropriate range is automatically selected by the instrument. The Resolution is 0.1μS for Conductivity and 0.1 ppm for TDS in the lowest range.

The cell constant is flashed on a digital display and can be adjusted from the front panel. Facility is also provided for automatic measurement of cell constant with a known standard solution.

These instruments are ideal for monitoring salt contents in water and soluble salts in soils. They are extremely useful instruments for agriculture and soil analysis lab, swimming pools, fertilizer plants, mineral water plants, petroleum refineries, textile plants etc.


Display3 1/2 Digit Bright Red LED Display
RangesFive Ranges
0 - 200 μS/cm
0 - 2 mS/cm
0 - 20 mS/cm
0 - 200 mS/cm
0 - 1000 mS/cm
Five Ranges
0 - 200 ppm
0 - 2 ppm
0 - 20 ppt
0 - 200 ppt
0 - 1000 ppt
Range SelectionAutomatic
Resolution0.1 μS/cm in lowest range0.1 ppm in lowest range
Accuracy±0.5 % FS ± 1Digit
Cell constantAdjustable on Digital Display
Temperature CompensationManual : 0 to 50oC
Auto Cell Constant MeasurementAvailable using any standard solution
Measuring CellPlatinum DIP Type
Power12V DC using Adapter 110 to 250V AC,50 Hz
Dimensions270 x 202 x 80 mm (l x b x h approx.)
Weight0.8 Kg approx.
AccessoriesConductivity/TDS Cell , Operation Manual, Cell Stand, Dust Cover, 12V Adapter

Note :All Conductivity/TDS Meters are supplied with Cell having cell constant of 1.0 approximately. Specifications are subject to change without notice due to continuous developments.