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Ohaus ST300C-G Portable Conductivity and TDS Meter with Temperature Measurement

UsedOhausConductivity metersUnited States

€491.61excl. VAT

In stock

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Measurement Range
00.0 μS/cm – 199.9 mS/cm; 0.1 mg/L – 199.9 g/L (TDS); 0 – 100 °C
Measurement Resolution
0.01 μS/cm; 0.1 mg/L; 0.1 °C
Display
LCD
Electrode
STCON3 (Included)
Accuracy ± (Temperature)
0.3 °C
All 22 specifications
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Specifications 22

Brands
Ohaus
New/Used
Used
Measurement Range
00.0 μS/cm – 199.9 mS/cm; 0.1 mg/L – 199.9 g/L (TDS); 0 – 100 °C
Measurement Resolution
0.01 μS/cm; 0.1 mg/L; 0.1 °C
Display
LCD
Electrode
STCON3 (Included)
Accuracy ± (Temperature)
0.3 °C
Battery Life
250 Hours with Disposable Batteries
Calibration
1 Point
Conductivity accuracy (±)
0.5 %
Conductivity measuring range
0.01 μS/cm-199.9 mS/cm
Dimensions (HxLxW)
1.38 in x 6.69 in x 3.54 in (35 mm x 170 mm x 90 mm)
In-use cover
No
Measurement Range (Temperature)
0 °C – 100 °C
Net Weight
0.35 lb (0.16 kg)
Parameter
Conductivity / TDS
Power
4 AAA (LR03) Batteries (Included)
Resolution Cond. (Variable)
0.01 – 1
Temperature Compensation
Automatic
Temperature Resolution
0.1 °C
Temperature Sensor
30 KΩ NTC
Working Environment
41°F – 104°F, 80%RH, non-condensing (5°C – 40°C, 80%RH, non-condensing)

Product description

Portable meter measuring conductivity, TDS, and temperature with galvanic electrode and automatic temp compensation.

Ohaus ST300C-G Meter (Model #30219115):

  • Measurement Range:
  • Conductivity: 00.0 μS/cm – 199.9 mS/cm
  • TDS: 0.1 mg/L – 199.9 g/L
  • Temperature: 0 – 100 °C
  • Resolution:
  • Conductivity: 0.01 μS/cm
  • TDS: 0.1 mg/L
  • Temperature: 0.1 °C
  • Accuracy:
  • Conductivity: ±0.5%
  • Temperature: ±0.3 °C
  • Display: LCD
  • Electrode: STCON3 (included galvanic type)
  • Calibration: 1-point calibration with easy recall of last calibration and stored data
  • Temperature Compensation: Automatic
  • Power: 4 AAA (LR03) batteries included, ~250 hours battery life
  • Dimensions (HxLxW): 35 mm x 170 mm x 90 mm (1.38 in x 6.69 in x 3.54 in)
  • Weight: 0.35 lb (0.16 kg)
  • Operating Environment: 5°C – 40°C (41°F – 104°F), 80% RH non-condensing
  • Additional Features:
  • Galvanic electrode provides immediate use without warm-up delay
  • Simple calibration and quick measurements suitable for field use
  • Supports automatic or manual endpoint detection for ease of operation

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Frequently asked questions

How long does laboratory equipment typically last?

With a service contract, ten to fifteen years is normal for most benchtop instruments. Detectors and pumps are the parts that wear first.

Can I get service for older equipment?

Yes. Every verified supplier states which service partners cover the instrument, and we list that alongside the offer.

Where can I buy parts?

Ask a scientist through the request button. Parts are often available even when the instrument itself is discontinued.

What is the typical lead time for refurbished equipment?

Two to six weeks, depending on refurbishment scope and whether calibration is included.

Does laboratory equipment ship internationally?

We ship to 38 countries. Crating and customs handling are quoted with the instrument.

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Last updated 19 October 2026