Ohaus ST300-B Portable pH/ORP Meter with Temperature Compensation

Name: Ohaus ST300-B Portable pH/ORP Meter with Temperature Compensation
Brand: Ohaus
SKU: 58897
Price: 400.7 EUR
Availability: InStock

UsedOhauspH meterUnited States

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Measurement Range: 0.00 – 14.00 pH; -1999 – 1999 mV; 0 – 100 °C
Accuracy: ±0.01 pH; ±1 mV; ±0.5 °C
Measurement Resolution: 0.01 pH; 1 mV; 0.1 °C
Display: LCD
Electrode: ST320 (Available as an accessory)

All 23 specifications

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Specifications 23

Brands: Ohaus
New/Used: Used
Measurement Range: 0.00 – 14.00 pH; -1999 – 1999 mV; 0 – 100 °C
Accuracy: ±0.01 pH; ±1 mV; ±0.5 °C
Measurement Resolution: 0.01 pH; 1 mV; 0.1 °C
Display: LCD
Electrode: ST320 (Available as an accessory)
Accuracy ± (mV): 1 mV
Battery Life: 500 Hours with Disposable Batteries
Calibration: 3 Point
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)
pH accuracy (±): 0.01
pH measuring range: 0 – 14
pH resolution: 0.01
Power: 4 AAA (LR03) Batteries (Included)
Resolution (Voltage): 1 mV
Temperature Compensation: Yes
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 pH/ORP meter with 0.01 pH accuracy, 3-point calibration, temp. compensation, and LCD display.

The Ohaus ST300-B pH meter is a convenient, portable instrument designed for accurate pH and oxidation-reduction potential (ORP) measurements, combined with temperature sensing.

Measurement range:
pH: 0.00 to 14.00
ORP: –1999 to 1999 mV
Temperature: 0 to 100 °C
Accuracy:
pH: ±0.01
ORP: ±1 mV
Temperature: ±0.5 °C
Resolution:
pH: 0.01
ORP: 1 mV
Temperature: 0.1 °C
Display: LCD for clear readout of measurements and calibration status
Calibration: 3-point calibration ensures precision
Power: Operates on 4 AAA (LR03) batteries included, with approx. 500 hours battery life
Electrode compatibility: Supports ST320 electrode (sold separately)
Temperature sensor: 30 KΩ NTC sensor integrated for automatic temperature compensation
Dimensions: 35 mm (H) x 170 mm (L) x 90 mm (W)
Weight: 0.35 lb (0.16 kg)
Operating environment: 5°C to 40°C (41°F to 104°F), 80% RH, non-condensing
Additional features include intuitive software interface with five input keys and built-in or standalone electrode holders for ease of use. The calibration accuracy is displayed directly on-screen to ensure reliable measurements.

€401 sits in the middle range ph meter here. The middle half of the 300 with a price runs from €121 to €626.

1 other listing of this model is available.

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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.