Ecosense EC300M Conductivity, Temp, Instrument & Accessories

EcoSense® EC300M Conductivity/Temperature Accurate, economical, handheld instrument The YSI EcoSense® instruments provide accurate data in the most affordable package. The "M" stands for memory and the instruments feature a real-time clock, larger memory and simple data transfer to a PC with a built-in USB port. The EC300M is easy-to-use, field-ready and utilizes a stable, 4 nickel electrode sensor design that results in accurate measurements.



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The EC300M measures conductivity, specific conductance, salinity, TDS (Total Dissolved Solids) and temperature with the following features:

  • Rugged, waterproof, field-worthy case. IP-67 rated.
  • Durable field probe and cables made in the USA. 1-,4- and 10-meter field cables available.
  • Waterproof micro-USB port for transferring data to PC; no software required.
  • Holds 250 data sets; no need to write down data.
  • Real-time clock for date/time stamp of saved data.
  • User-selectable re-calibration prompt provides reminder to calibrate.
  • Automatic temperature compensation.
  • Stable, four-electrode design provides accurate field measurements.
  • 1-year warranty on instrument and probe/cable assembly.

The EC300M is designed for quick, accurate results in an economical platform. Easy-to-use, waterproof and backed by a 1-year warranty, the EC300M is ideal for a wide-range of applications.

Manufacturer Specifications

Part Number
Compatible With Additional Notes
Instrument Only YSIEC300M Conductivity,TDS, Salinity,Temp Instrument Only
Probes and Cables
YSI300-1 Conductivity/Temp Probe and 1M Cable EC300, EC300A, EC300M Probe and Cable only
YSI300-4 Conductivity/Temp Probe and 4M Cable EC300, EC300A, EC300M Probe and Cable only
YSI300-10 Conductivity/Temp Probe and 10M Cable EC300, EC300A, EC300M Probe and Cable only
ECO300M Kits
YSI300MCC-01 Kit, EC300M, 1M Probe/Cable and Carrying Case
YSI300MCC-04 Kit, EC300M, 4M Probe/Cable and Carrying Case
YSI300MCC-10 Kit, EC300M, 10M Probe/Cable and Carrying Case
Carry Case
YSI380A Carrying Case, Hard Plastic w/Form Fitted Foam Insert 12.5x9.5x3.7