Electrical Conductivity (EC) / Salinity Meters

Knowing the EC of your soil is a useful  and simple precision agriculture technique. Knowing the EC of your soil will help with your fertilizer decisions  and knowing what quantity of available nutrients are in the soil.

Conductivity meters measure the number of ions that are mobile within a liquid and is considered the most accurate way of determining the salinity of the soil which is indicative of the ability of the soil solution to carry an electric current.

Because plants take in nutrients in ion form e.g. nitrogen ions, phosphorus ions and potassium ions (NPK), measuring a soil solution is a good indication of the total mount of nutrients available to the plants (although not the specific nutrients).

EC measurements below 100µS for example may indicate not enough nutrients  for the plants whereas numbers greater than 1000µS may indicate that there is pollution entering your soils and high salts accumulating that can cause plant rootlets to burn and microbes to die.

EC meters can be used for a variety of other  purposes too:

  • To determine the quality of water, high quality distilled drinking water will ideally have
  • The concentration of liquid fertilizers in your spray bottles. Dilute liquid fertilizers with water to a consistent EC level to get the same consistent concentration levels each time.
  • Use to test the maturity and quality of compost.
  • To measure the ions in plant leaves. Theoretically as nutrients are converted to sugars in the leaves, we may expect to see the EC levels go down as Brix levels rise (sugars and dissolved solids as measured by a refractometer), leaf EC should be between 2,000 - 12,000 µS.
  • Some people even use it to measure the amount of salts in their own urine and saliva.

All our EC testers listed have ATC (Auto Temperature Compensation) which removes errors caused by temperature variance. All EC testers require calibration solution for proper calibration prior to testing.

Conductivity / Salinity Meters

Results 1 - 21 of 21

1,413 Microsiemens EC Calibration Solution (125ml)

1,413 Microsiemens EC Calibration Solution for Electrical Conductivity meters that measure low EC samples.
 
Sales price: $5.99
SKU: HI7031_S
 
 
 
 
 

12,880 Microsiemens EC Calibration Solution (125ml)

12,880 Microsiemens EC Calibration Solution for higher ranging electrical conductivity meters.
 
Sales price: $5.99
SKU: HI7030_S
 
 
 
 
 

1,413 Microsiemens EC Calibration Solution (1 Pint)

1,413 Microsiemens EC Calibration Solution for Electrical Conductivity meters that measure low EC samples.
 
Sales price: $11.99
SKU: AGS-HI7031L
 
 
 
 
 

12,880 Microsiemens EC Calibration Solution (1 Pint)

12,880 Microsiemens EC Calibration Solution for higher ranging electrical conductivity meters.
 
Sales price: $12.99
SKU: HI7030
 
 
 
 
 

2,760 Microsiemens EC Calibration Solution (1 Pint)

2,760 Microsiemens EC Calibration Solution for Electrical Conductivity meters that measure low EC samples.
 
Sales price: $19.99
SKU: AGS-2760EC
 
 
 
 
 

Salt Calibration Solution NaCl 0.5% and 5.0% (125mL each)

This calibration solution is designed for use with the B-721 Horiba LAQUA Salt Tester. It includes two 125mL bottles of solution, one being 0.5% NaCl calibration solution and the other being 5.0%...
 
Sales price: $39.99
SKU: NACLCALSET
 
 
 
 
 

Extech Waterproof Salinity Meter with ATC (0 - 70ppt)

This salinity meter is waterproof and ideal for field testing of streams, lakes, and ponds as well as fish tanks, irrigation and ground water. With a wide range from 0 to 70ppt.
 
Sales price: $69.89
SKU: EC170
 
 
 
 
 

Horiba Cardy Twin Conductivity Replacement Sensor

Over time the EC meters will start to dry out, get protein in the sensor and develop cracks on the glass membrane. This sensor is designed to replace the entire sensor for the Cardy Twin EC meter.
 
Sales price: $84.99
SKU: 315002
 
 
 
 
 

LaMotte EC TDS Salt Tracer - 1749

This compact meter measures the electrical conductivity, total dissolved solids and salts. It does this through a conductivity test which is directly related to the dissolved salts.
 
Sales price: $99.99
SKU: 1749
 
 
 
 
 

Extech EC, TDS, Salinity and Temperature Kit - EC410

This kit contains the EC400 meter with calibration solutions, sample vials, weighted base for vials and a heavy duty carry case.
 
Sales price: $139.99
SKU: EC410
 
 
 
 
 

Replacement Sensor for the Horiba LAQUA Twin Conductivity Meter B-771

Over time the EC meters will start to dry out, get protein in the sensor and develop cracks on the glass membrane. This sensor is designed to replace the entire sensor for the LAQUA Twin Electrical...
 
Sales price: $144.99
SKU: B-771_sensor
 
 
 
 
 

Extech Combination pH and Conductivity meter - EC500

This waterproof 5 in 1 meter lets you measure electrical conductivity, the pH, total dissolved solids, salinity and temperature all in an easy to use meter. Includes auto-ranging and 8 selectable...
 
Sales price: $159.99
SKU: EC500
 
 
 
 
 

Extech Combination pH and Conductivity Kit - EC510

This waterproof 5 in 1 meter kit lets you measure electrical conductivity, the pH, total dissolved solids, salinity and temperature all in an easy to use meter and kit.
 
Sales price: $189.99
SKU: EC510
 
 
 
 
 

Horiba LAQUA Twin Conductivity (EC), Salt, TDS Meter (B-771)

For measuring salinity of water or total dissolved solids in liquid. Measures from 1-19,999 microsiemens/cm from a single drop of fluid. 2 Point calibration. Also measures salt from 1.1% and TDS from...
 
Sales price: $324.99
SKU: B-771
 
 
 
 
 

Extech Oyster Series pH, Conductivity Meter - Polymer C

Polymer Cell - Measurement range - 10 to 19990μS, pH 0.01 to 14.00pH. The oyster series ph, conductivity and TDS meter is great for both field use and bench top use. Comes with all the necessary...
 
Sales price: $359.99
SKU: 341350-P
 
 
 
 
 

Extech Oyster Series pH, Conductivity Meter - Glass Cell

Polymer Cell - Measurement range - 10 to 19990μS, pH 0.01 to 14.00pH. The oyster series ph, conductivity and TDS meter is great for both field use and bench top use. Comes with all the necessary...
 
Sales price: $359.99
SKU: 341350
 
 
 
 
 

LaMotte Total Dissolved Salts 6 Series Meter - 5-0037-01

This meter measures the total dissolved salts in a soil sample. It uses a conductivity reading which directly indicates the total dissolved salts present.
 
Sales price: $449.95
SKU: AGS-5-0037-01
 
 
 
 
 

Waterproof, Multi-range EC and TDS Meters with ATC for Field App

The Waterproof, Multi-range EC and TDS Meters with ATC for Field Applications is a rugged meter designed to hold up under extended use in wet, humid, dusty and muddy conditions.
 
Sales price: $469.99
SKU: AGS-HI9033
 
 
 
 
 

Multi-range Conductivity Meter with Manual Temp Compensation

The Multi range Conductivity Meter is a multi range bench top conductivity meter with four measurement ranges to ensure the highest resolution and accuracy to meet high measuring requirements.
 
Sales price: $599.99
SKU: EC 214
 
 
 
 
 

Extech Benchtop Water Quality Meter/Stirrer 6 Parameter (WQ510)

This highly accurate benchtop meter features a built-in magnetic stirrer and a probe support rod and clamp. It measures 6 water quality parameters including pH, ORP, salinity, conductivity and more.
 
Sales price: $628.99
SKU: WQ510
 
 
 
 
 

Extech Benchtop Water Quality Meter/Stirrer 7 Parameter (WQ530)

This highly accurate benchtop meter features a built-in magnetic stirrer and a probe support rod and clamp. It measures 6 water quality parameters including pH, ORP, salinity, dissolved oxygen and...
 
Sales price: $828.99
SKU: WQ530