HORIBA LAQUAtwin EC-33 Waterproof Pocket Conductivity, TDS & Temperature Meter

Product Overview

The HORIBA LAQUAtwin EC-33 is a compact pocket meter that measures electrical conductivity, total dissolved solids (TDS) and temperature directly from a 0.12 mL liquid sample. Its integrated flat sensor enables simple testing from a few drops of sample or calibration solution without requiring a beaker.

The EC-33 combines auto-ranging conductivity measurement, TDS conversion, temperature display and three-point calibration in a waterproof portable format. It offers selectable TDS curves for applications that require an appropriate conductivity-to-TDS conversion.

Key Features

• Measures electrical conductivity, TDS and temperature

• Direct measurement from only 0.12 mL of liquid sample

• Flat integrated sensor; no beaker required for calibration or testing

• Auto-ranging conductivity measurement

• Up to 3-point conductivity calibration

• Automatic recognition of 1,413 µS/cm, 12.88 mS/cm and 111.8 mS/cm standards

• Four selectable TDS conversion curves: adjustable TDS factor, EN 27888, 442 and NaCl

• Adjustable TDS factor from 0.4 to 1.0

• Automatic temperature compensation, fixed at 2%/°C

• Temperature display from 0.0 to 50.0°C

• Temperature calibration from 5 to 40.0°C

• Auto Stable and Auto Hold functions

• Backlit monochrome LCD

• IP67 waterproof and dustproof construction

• Replaceable S070 conductivity sensor

• Automatic power-off after 30 minutes

• Low-battery indicator

• Approx. 400 hours of continuous operation without backlight

• Carrying case included

• Warranty: 2 years for meter; 6 months for sensor

Technical Specifications

Package Contents

• HORIBA LAQUAtwin EC-33 pocket conductivity/TDS/temperature meter

• S070 replaceable conductivity sensor

• 1,413 µS/cm conductivity standard solution, 14 mL

• 12.88 mS/cm conductivity standard solution, 14 mL

• Conditioning solution, 4 mL

• 2 × CR2032 batteries

• Dropper/pipette

• Carrying/storage case

• Instruction manual and quick guide

Compatible Accessories

• S070 replacement conductivity sensor — Part No. 3200459672

• 1,413 µS/cm conductivity standard, 514-22 — Part No. 3999960110

• 12.88 mS/cm conductivity standard, 514-23 — Part No. 3999960111

• Conditioning solution, 514-20 — Part No. 3999960114

Suitable Applications

Suitable for hydroponic and nutrient solutions, water treatment, aquariums, agricultural testing, environmental sampling, laboratory spot checks, water-quality monitoring and general field testing.

Important Use Note

The EC-33 is IP67 rated for protection from dust and temporary water exposure; it is not intended for underwater measurement. It is designed for liquid samples and should not be used to test solids, powders or paper materials directly.