Horiba Conductivity/Resistivity/Salinity/TDS Meter – ES-71

In stock

This meter measures conductivity, resistivity, TDS, and salinity with a single probe which comes included with the meter. Waterproof and field ready.

Horiba Conductivity/Resistivity/Salinity/TDS Meter – ES-71




  • Waterproof design is field ready
  • Handheld design is lightweight and easy to use
  • Measures 4 parameters with a single probe - Conductivity, Resistivity, Salinity, and TDS (as well as temperature)
  • Stores up to 1,000 data points
  • Integral RS-232C port for connection with PC or printer
  • Auto power off to save batteries
  • Self diagnosis function
  • AC powered option

The Horiba ES-71 meter is designed for field testing of conductivity, resistivity, TDS and salinity with a single electrode. Because these three variables are all measured using the same method they can be determined with a single test and derived from the resulting conductivity measurement.


This meter is handheld and waterproof for safe field testing of waterways, lakes, streams, ponds, etc. The ES-71 is also great for laboratory testing as it provides precision readings on a broad scale.


The Horiba ES-71 comes with a 9382-10 Conductivity cell which has a measurement range of 0.0 μS/cm to 200.0 mS/cm. This conductivity cell is designed for general purpose testing and is a great tool for most conductivity testing situations. Other conductivity cells can be used with this meter to fit special testing circumstances. The complete list of conductivity cells can be found here.




  • Measurement Method (Conductivity): AC bipolar method
  • Measurement Method (Salinity, Resistivity, TDS): Conductivity measurement conversion
  • Measurement Range:
    • Conductivity: 0.0 μS/m~200.0 S/m (Cell constant 100 m-1: 0.000 mS/m~20.00 S/m, Cell constant 10 m-1: 0.0 μS/m~2.000 S/m, Cell constant 1000 m-1: 0.00 mS/m~200.0 S/m
    • Salinity: 0.00%~4.00% (0.0 PPT~40.0 PPT)
    • Resistivity: 0.000 Ω・m~2.000 MΩ・m (Cell constant 100 m-1: 0.00 Ω・m~200.0 kΩ・m, Cell constant 10 m-1: 0.0 Ω・m~2.000 MΩ・m, Cell constant 1000 m-1: 0.000 Ω・m~20.00 kΩ・m
    • TDS: 0.01 mg/L~100 g/L
    • Temperature: 0.0℃~100.0℃ (-30℃~130℃) (Flashing in the case of outside measurement range)
  • Resolution:
    • Conductivity: 0.05%F.S.
    • Salinity: 0.01%/0.1 PPT
    • Resistivity: 0.05%F.S.
    • TDS: 0.01 mg/L
    • Temperature: 0.1℃
  • Repeatability:
    • Conductivity: ±0.5% F.S.±1 digit
    • Resistivity: ±0.5% F.S.±1 digit
    • Temperature: ±0.1℃±1digit
  • Power Supply: LR03/AAA alkaline batteries or AAA Ni-H rechargeable batteries × 2, AC adapter 100 V to 240 V 50/60 Hz (optional)
  • Mass (without batteries or electrode): Approximately 270g

Unit Ship Weight: 3 lbs

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