Convenient conductivity, TDS, salinity, and temperature field measurements.


  • Auto ranging meter
  • Automatic temperature compensation
  • Three cable lengths to choose from
  • Waterproof conductivity meter
  • Automatic shutoff and low battery indicator
  • Record up to 50 data sets

Field Conductivity Meters Product Description

The EC300A field conductivity meters are part of the EcoSense family of products. These simple and affordable field conductivity meters are precision tools that measure conductivity, salinity, total dissolved solids, and temperature. The model EC300A field conductivity meter comes with a super-stable rugged weighted four-electrode conductivity cell assembly on several different cable lengths. The field conductivity meters have a built-in microprocessor which calculates and compensates for all parameters related to conductivity and temperature determinations. The field conductivity meters are waterproof (IP67) when the connector cap is installed. The mechanical touch keys of the field conductivity meters are highly reliable with tactile and audio feedback. The field conductivity meters use one 9V battery which provides up to 500 hours of battery life. The field conductivity meters offer a low battery indicator and an automatic shutoff feature to help you maintain your instrument. Re-calibration is not required when power is restored to the field conductivity meter. The front of the field conductivity meters have a large LCD that displays temperature and either temperature compensated or non-temperature compensated conductivity, salinity or TDS simultaneously along with user prompts and mode indicators. The field conductivity meter prompts users through calibration and measurement procedures. Other field conductivity meter features include automatic conductivity ranging, can store 50 data sets in memory, and 50/60 Hz AC noise rejection. This field conductivity meter is universal and user-friendly for field, industrial and laboratory applications. This line of field conductivity meters comes with a one year instrument, electrode, and cable warranty.

Field Conductivity Meters Specifications

Conductivity Range:
     0.0 to 499.9 µS/cm
     0.0 to 4999 µS/cm
     0.0 to 49.99 mS/cm
     0.0 to 200.0 mS/cm
Conductivity Accuracy:
     ±(1% of reading +2 µS/cm)
     ±(1% of reading +5 µS/cm)
     ±(1% of reading +0.05 mS/cm)
     ±(2.5% of reading +0.5 mS/cm)
Conductivity Resolution:
     0.1 µS/cm
     1 µS/cm
     0.01 mS/cm
     0.1 mS/cm
Salinity Range: 0.0 to 70.0 ppt, calculated
Salinity Accuracy: ±0.2% FS
Salinity Resolution: 0.1 ppt
TDS Range: TDS in g/L calculated
TDS Constant: programmable, 0.30 to 1.00, default 0.65
Temperature Range: 14° to 194°F (-10° to 90°C)
Temperature Accuracy: ±0.36°F (±0.2°C) or ±0.4% whichever is greater
Temperature Resolution: 0.18°F (0.1°C)
Conductivity Temperature Compensation: Automatic
Conductivity Temperature Coefficient: 0.0% to 4.0%
Conductivity Reference Temperature: 59.0 to 77.0°F (15.0 to 25.0°C)
Conductivity Cell Constant: 5.00 ± 0.50
Temperature Sensor: Thermistor, 10 k? at 77°F (25°C)
Display: LCD
Calibration Back-up: Yes
Audio Feedback: Yes, on all touch keys
Battery: One 9V battery, included
Battery Life: ~ 500 hours (low battery indicator)
Memory: 50 data set reviewable memory
Operating Temperature Range: 32 to 122°F (0 to 50°C)
Operating Relative Humidity Range: up to 95%
IP Rating: IP67 when connector cap installed
Dimensions (LxWxH): 7.37x3x1.5 inch (18.7×7.6×3.8cm)
Weight: 0.6 lb (270g) with batteries
Warranty: 1 year, meter, electrode, and cable
Test certificates: CE

Field Conductivity Meters Options

EC300A Field Conductivity Meter (PN# 606079)
Field conductivity meter only

300-1 Field Conductivity Meter Cable Assembly (PN# 606044)
Includes 3.3 ft (1 m) cable with attached conductivity/temperature probe.

300-4 Field Conductivity Meter Cable Assembly (PN# 605395)
Includes 13.1 ft (4 m) cable with attached conductivity/temperature probe.

300-10 Field Conductivity Meter Cable Assembly (PN# 605396)
Includes 32.8 ft (10 m) cable with attached conductivity/temperature probe.

Field Conductivity Meter Carrying Case (PN# 606043)
Hard plastic carrying case with form fitted foam insert for EC300A.


065270 1,000 µS/cm Field Conductivity Meter calibration solution, 1 quart (0.95 L) (PN# 065270)

065272 10,000 µS/cm Field Conductivity Meter calibration solution, 1 quart (0.95 L) (PN# 065272)

065274 100,000 µS/cm Field Conductivity Meter calibration solution, 1 quart (0.95 L) (PN# 065274)


EC500 Pocket pH/Conductivity Tester
Includes electrode, protective sensor cap, sample cup with cap, four 1.5V SR44W batteries, and a 48 inch (1.2m) neckstrap.

EC510 Pocket pH/Conductivity Tester Kit
Includes an EC500 portable conductivity meter with sensor, 84uS, 1413uS, 12880uS calibration standards, pH buffer pouches (1 each of 4, 7, 10pH plus rinse solution), weighted base, protective sensor cap, 3 sample cups, four 1.5V SR44W batteries, carrying case, and a 48 inch (1.2m) neckstrap

2CA102 Cond 3110 Set Handheld Conductivity Meter Set
Includes meter, tetraCon 325-3, case & accessories.

Lab 960 Benchtop Conductivity Meter

WQ-Cond Conductivity Sensor
4-20mA output.  Includes 25 ft of cable.

WQ Water Quality Sensors