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YSI EcoSense EC300A



Country of Origin


Accurate, Economical Pen-Style Measurement

The EcoSense® line of compact, handheld instruments provides the most accurate data in the most affordable format. The instruments feature an easy-to-use interface, one-hand operation, IP67 waterproof case, and low cost of ownership over the life of the product. The EC300A simultaneously measures conductivity, specific conductance, salinity, TDS (Total Dissolved Solids) and temperature with the following features:


Product dimension

pH100A Instrument Only Specifications


Temperature                                                    Range           -10 to +120°C (14 to 248°F)

                                                                        Resolution       0.1°C

                                                                        Accuracy         ±0.3°C ±1 digit

pH                                                                     Range            -2 to 16 units

                                                                        Resolution      0.01 unit

                                                                        Accuracy      ±0.01% of full scale or ± 0.03 pH units

                                                                                         System  Accuracy  (Instrument, sensor, cable): ±0.2 pH units

mV                                                                    Range            -1999 to +1999 mV

                                                                        Resolution      1 mV

                                                                        Accuracy         ±0.1%  ±1 digit

pH100A Additional Specifications

Operating range

                                              Temperature              0° to 50° C (32 to 122°F)

                                              Relative Humidity        up to 95%

Water rating                          IP67 waterproof

Size                                         78 mm wide (widest point) x 184 mm long x 37 mm deep (3.1 in. x 7.25 in. x 1.45 in.)

Weight with battery              272 grams (0.6 lb.)

ATC Probe                               Thermistor, 10kΩ / 25° C

Battery                                    One 9 volt included with purchase; 1000 hour battery life

pH temp compensation        Auto/Manual -10.0° C to 120.0°C (14 to 248°F)

pH buffer recognition            US (4.00, 7.00, & 10.00 at 25°C or 4.00, 7.02 & 10.06 at 20°C) or NIST (4.01, 6.86, & 9.18 at 25°C or 4.00, 6.87 & 9.23 at 20°C)

pH calibration temp               0°C to 60°C (32 to 140°F)

pH offset recognition             +90 mV at pH 7.00 or 6.86

pH slope recognition             +30% at pH 4.00, 4.01, 9.18, or 10.01

Calibration back-up                Yes

Audio feedback                      Yes, all keys

Autolock feature                     Yes

Memory                                  50 data set reviewable memory

Auto shutoff                            Automatically powers off after 30 minutes of inactivity


• IP67 Waterproof housing

• 1-year instrument warranty

• Rugged, weighted probe assembly

• Automatic temperature compensation

• 4- and 10-meter field cables available

• Low battery indicator with 500 hour battery life

• Super-stable, four-electrode conductivity cell designed for the field

• Auto shutoff function after 30 minutes of inactivity

• 50 data set memory


1 unit minimum