Ohaus DO Meter ST400D-G Optical Portable Dissolved Oxygen Meter with Temperature Compensation

Name: Ohaus DO Meter ST400D-G Optical Portable Dissolved Oxygen Meter with Temperature Compensation
Brand: Ohaus
SKU: 64658
Price: 1774.25 EUR
Availability: InStock

UsedOhausMetersUnited States

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Measurement Range: 0.00 – 20.0 mg/L(ppm); 0 – 50 °C
Accuracy: ±0.2 mg/L(< 8 mg/L) or ±0.3 mg/L(8~20 mg/L); ±0.3 °C
Measurement Resolution: 0.01 mg/L; 0.1 °C; 0.1%
Display: Color LCD Graphics
Electrode: STDO21 (Included)

All 23 specifications

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Specifications 23

Brands: Ohaus
New/Used: Used
Measurement Range: 0.00 – 20.0 mg/L(ppm); 0 – 50 °C
Accuracy: ±0.2 mg/L(< 8 mg/L) or ±0.3 mg/L(8~20 mg/L); ±0.3 °C
Measurement Resolution: 0.01 mg/L; 0.1 °C; 0.1%
Display: Color LCD Graphics
Electrode: STDO21 (Included)
Accuracy DO: 0.2 ppm
Accuracy ± (Temperature): 0.3 °C
Battery Life: 12 hours with Disposable Batteries
Calibration: 2 Point
Dimensions (HxLxW): 1.38 in x 5.91 in x 3.54 in (35 mm x 150 mm x 90 mm)

In-use cover: No
Measurement Range DO: 0 ppm – 20 ppm
Measurement Range (Temperature): 0 °C – 50 °C
Net Weight: 0.35 lb (0.16 kg)
Parameter: Dissolved Oxygen
Power: 4 AAA (LR03) Batteries (Included)
Resolution (DO): 0.01
Temperature Compensation: Automatic
Temperature Resolution: 0.1 °C
Temperature Sensor: 10 KΩ NTC
Working Environment: 41°F – 104°F, 80%RH, non-condensing (5°C – 40°C, 80%RH, non-condensing)

Product description

Portable optical dissolved oxygen meter with galvanic electrode, 0–20 mg/L range, automatic temp compensation, 12h battery life.

Measurement Range: 0.00 – 20.0 mg/L (ppm) dissolved oxygen; 0 – 50 °C temperature
Accuracy: ±0.2 mg/L (for <8 mg/L), ±0.3 mg/L (8–20 mg/L), temperature ±0.3 °C
Resolution: 0.01 mg/L DO; 0.1 °C temperature; 0.1% humidity
Display: Color LCD graphics
Electrode: Model STDO21 (included) galvanic sensor, optical technology
Calibration: 2-point calibration, automatic or manual endpoint recall, stores calibration data
Battery: 4 AAA (LR03) disposable batteries included, 12-hour battery life
Temperature Compensation: Automatic with 10 KΩ NTC sensor
Dimensions: 35 mm (H) x 150 mm (L) x 90 mm (W) (1.38 in x 5.91 in x 3.54 in)
Weight: 0.16 kg (0.35 lb)
Operating Environment: 5°C – 40°C (41°F – 104°F), 80% relative humidity, non-condensing
Power: Battery powered for portable use
Additional Features: Immediate electrode use after power-up, quick measurement delivery, easy calibration with last data recall option, no in-use cover included.

€1,774 sits above most meters here. The middle half of the 251 with a price runs from €142 to €800.

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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?

Often, yes. Verified suppliers frequently work with service partners converting the instrument. If applicable, we can list servicing options 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.