EC400S Portable Conductivity/TDS/Salinity/Resistivity Meter Kit


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The Apera Instruments EC400 Portable Conductivity/TDS Meter Kit is the most economical choice for a reliable portable conductivity meter. Equipped with Apera’s BPB (Brush-Resistant Platinum Black) conductivity sensor/electrode/tester, the meter tests EC, TDS, and temperature simultaneously in a quick and accurate manner (Accuracy: ±1.0% F.S, Range: 0 to 200mS, 0 to 50°C(32 to 122°F) Auto or Manual Temperature Compensation)


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The Apera Instruments EC400s provides accurate and stable EC400S measurements with various intelligent functions and a durable structure. Equipped with apera’s unique bpb (brush-resistant Platinum black) conductivity sensor, the meter takes accurate measurements of EC, TDS, salinity, resistivity and temperature in a wide range .

Intelligent Functions: Quick & Easy 1 to 3 Points Auto Calibration. The Smart Self-Diagnosis helps you conduct proper calibrations and determine the condition of your probe. Fully configurable parameter setting: solution standards, temperature unit, backlight time, auto-power off time, TDS factor, temperature coefficient, etc. The large clear LCD displays EC/Temperature simultaneously along with icons of stable readings and finished calibrations.


We warrant this instrument to be free from defects in material and workmanship and agree to repair or replace free of charge, at the option of APERA INSTRUMENTS, LLC, any malfunctioned or damaged product attributable to the responsibility of APERA INSTRUMENTS, LLC for a period of TWO YEARS for the instrument and SIX MONTHS for the probe from the delivery.

This limited warranty does NOT cover any issues due to:

  • Accidental damage
  • Improper use
  • Normal wear and tear
  • Transportation
  • Storage
  • Failure to follow the product instructions
  • Unauthorized maintenance, modifications, combination or use with any products, materials, processes, systems or other matter
  • Unauthorized repair
  • External causes such as accidents, abuse, or other actions or events beyond our reasonable control.
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Measuring Range
Conductivity: 0 to 200 mS/cm include:
(0.00~19.99) μS/cm; (20.0~199.9) μS/cm;
(200~1999) μS/cm; (2.00~19.99) mS/cm;
(20.0~199.9) mS/cm;
TDS: (0~100) g/L;
Salinity: (0 to 100) ppt;
Resistivity: (0 to 100) MΩ·cm
0.01/0.1/1 μS/cm 0.01/0.1 mS/cm
±1.0% F.S ±1 digit
Temperature Compensation
0 to 50°C (32 to 212°F) Auto or Manual
Electrode Constant
0.1 / 1 / 10 cm-1
Measuring Range
-10~110°C (32 to 230°F)
±0.5°C±1 digit
Data Storage
500 groups
Storage Content
Numbering, Date, Time, Measurements, Unit, Temperature
Data Output
USB — PC-Link Software
Power Supply
AA Batteries *4 (1.5V*4) / USB
IP Rating
IP57 Waterproof and Dustproof
Dimensions and Weight
Meter: (7.8*3.4*1.25) inches / 12 oz.; With carrying case: (13*15*3.5) inches / 3.6 pounds

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EC400 Portable Conductivity/TDS/Salinity/Resistivity Meter Kit

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EC400S Portable Conductivity/TDS/Salinity/Resistivity Meter Kit

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