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YSI Pro30



Country of Origin


Handheld Conductivity, Salinity, Specific Conductance, TDS (total dissolved solids), Temperature

Rugged and reliable, the YSI Pro30 is ideal in any field application for the measurement of conductivity. The Pro30 features userreplaceable cables in lengths up to 30-meters, 50 data set memory, and a simple calibration routine. True field performance is verified with the IP-67 waterproof and impact resistant case - drop tested at 1-meter. Additionally, the YSI super-stable 4-electrode conductivity cell is so reliable it is built directly into the 2-year warranty cable.

Product dimension

Pro30 System Specifications (instrument w/ cable and sensor)

Conductivity                        Sensor Type       Four-electrode cell

(mS, µS)                               Range               0 to 200 mS/cm (auto range)

                                            Accuracy      1- or 4-m cable, ±1.0% of the reading or 1.0 μS/cm, whichever is greater;

                                                               10-, 20-, or 30-m cable, ±2.0% of the reading or 1.0 μS/cm, whichever is greater

                                            Resolution       0.0001 to 0.1 mS/cm (range dependent)

Salinity                                 Range                Calculated - 0 to 70 ppt

(ppt, PSU)                            Accuracy        ±1.0% of the reading or 0.1 ppt, whichever is greater

                                            Resolution           0.1 ppt

Temperature                       Range                -5 to 55 °C (23 °C to 131 °C)

(°C, °F)                                 Accuracy              ±0.2 °C

                                            Resolution           0.1 °C

Total Dissolved Solids (TDS)    Range       Calculated - 0 to 100 g/L TDS; constant range 0.30 to 1.00 (0.65 default)

(kg/L, g/L)                            Accuracy   Dependent on temp, conductivity and TDS constant; calculated from those parameters                       

                                            Resolution          0.001, 0.01, 0.1 g/L

Pro30 Instrument Specifications

Conductivity                                               ±0.5% of reading or 1.0 uS/cm, whichever greater

Size                                                           8.3 cm width x 21.6 cm length x 5.7 cm depth (3.25 in. x 8.5 in. x 2.25 in.)

Weight with batteries                                    475 grams (1.05 lbs.)

Power                                                     2 alkaline C-cells providing 400 hours of battery life; low battery indicator on Pro30

Cables                                                        1- 4- 10- 20- and 30-m lengths (3.28, 13.1, 32.8, 65.6 ft.)

Warranty                                                     3-year instrument; 2-year cable and sensor

TDS Constant Range                                      Adjustable; 0.3-1.0 

Conductivity Reference Temp                                                                Adjustable; range 15 °C to 25 °C

Specific Conductance Temp Comp                Adjustable; 0 to 4%

Data Memory                                                  50 data sets

Languages                                                    English, Spanish, German, French

Certifications                                             RoHS, CE, WEEE, IP-67 waterproof, 1-meter drop test


• 3-year instrument; 2-year cable and sensor warranty

• User-replaceable cables. Conductivity sensor built into cable. Choose among 1-, 4-, 10-, 20-, or 30-meter cables.

• Fast cal routine allows easy calibrations with the press of a button. Remembers the previous calibration values and simply walks you through the routine.

• Stores 50 data sets; no need to write down data

• Graphic, backlit display and glow in the dark keypad

• Tough. IP-67, impact-resistant, waterproof case even without the battery cover. Rubber over molded case provides extra durability.

• Rugged, military spec connectors. Bayonet style with keyed-quarter-turn lock.

• Super-stable, weighted 4-electrode conductivity sensor is built in for true field performance and designed for rugged conditions. Easily cleaned with a conductivity cleaning brush.


1 unit