919216626616 919216626616

Environmental & Scientific Instruments Co.
Environmental & Scientific Instruments Co.


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Plot–111, Industrial Area Phase 2, Panchkula, Haryana - 134113, India

Mobile : +91-9216626616

Phone : +91-172-5033251

Digital Conductivity/TDS Meter- 641

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.



  • Microcontroller Based
  • Measures Conductivity and TDS
  • Auto Ranging Facility
  • Auto Cell Constant Measurement
  • 3½ Digit Display


Type Digital Conductivity Meter
Certification CE Certified
Weight 0.8 Kg approx.
Color White
Voltage 3-6VDC, 6-9VDC
Display Type Digital
Automatic Grade Automatic, Fully Automatic
Body Material Aluminum
Power Source Battery, Electric
Features Durable, Multi Jet
Brand Name EI
Display 3½ Digit Bright Red LED Display
Range Selection Automatic
Accuracy ±0.5 % FS ± 1Digit
Cell constant Adjustable on Digital Display
Measuring Cell Platinum DIP Type
Power 12V DC using 230 + 10% AC Adapter
Dimensions 270 x 202 x 80 mm (l x b x h approx.)

Additional Information

Product Code 641

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