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Ohaus Portable Conductivity and TDS Meter ST300C-B

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
Accuracy ± (Temperature)
0.3 °C
Battery Life
250 Hours with Disposable Batteries
All 21 specifications
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Specifications 21

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
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 conductivity/TDS meter with galvanic electrode, automatic temperature compensation, and 1-point calibration.

  • Measurement Parameters: Conductivity (00.0 μS/cm – 199.9 mS/cm), TDS (0.1 mg/L – 199.9 g/L), Temperature (0 – 100 °C)
  • Measurement Resolution: Conductivity 0.01 μS/cm, TDS 0.1 mg/L, Temperature 0.1 °C
  • Accuracy: ±0.5% conductivity, ±0.3 °C temperature
  • Calibration: Single-point calibration with automatic or manual endpoints; user can recall last calibration data easily
  • Temperature Compensation: Automatic, using 30 KΩ NTC sensor
  • Display: LCD
  • Power Supply: 4 AAA (LR03) batteries included, battery life approx. 250 hours
  • Dimensions: 1.38 in x 6.69 in x 3.54 in (35 mm x 170 mm x 90 mm)
  • Weight: 0.35 lb (0.16 kg)
  • Operating Environment: 5 °C – 40 °C, 80% relative humidity, non-condensing
  • Additional Features: Galvanic electrode ready for immediate use without warm-up delay; simple calibration process; handheld and portable design for field use.

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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