OHAUS STARTER 300 Digital Benchtop pH Meter with pH Electrode and Adjustable Electrode Stand

The OHAUS STARTER 300 pH Meter is a laboratory instrument designed for accurate and reliable measurement of pH levels in liquid samples. Manufactured by OHAUS, this instrument belongs to the STARTER series of analytical measurement equipment and is suitable for routine laboratory testing, research applications, educational laboratories, water quality analysis, and quality-control environments.

The OHAUS STARTER 300 is designed to provide straightforward pH measurement through a digital LCD display and an easy-to-operate control panel. The instrument supports pH, millivolt (mV), and temperature measurements, making it useful for different laboratory testing procedures. Its digital measurement system helps laboratory personnel obtain readable results without relying on traditional manual pH testing methods.

The instrument features a clear LCD screen that displays measurement readings and relevant operating information. Its keypad provides access to essential functions such as calibration, measurement, reading, and setup. The straightforward interface makes it suitable for routine analytical work in laboratories where dependable pH measurements are required.

The STARTER 300 supports a pH measurement range of 0.00 to 14.00 pH, covering the typical acidic, neutral, and alkaline ranges encountered in laboratory samples. It also supports millivolt measurements from -1999 to +1999 mV and temperature measurement from 0°C to 100°C. The specified pH resolution is 0.01 pH, allowing readings to be displayed with two decimal places.

One of the important features of the OHAUS STARTER 300 is its multi-point calibration capability. The instrument supports up to three-point calibration and four predefined buffer groups. This allows users to calibrate the meter using appropriate standard buffer solutions before performing measurements. Automatic buffer recognition helps simplify the calibration process and reduces the possibility of selecting incorrect calibration values.

The instrument also supports automatic and manual temperature compensation (ATC and MTC). Temperature compensation is important because pH measurements and buffer values can vary with temperature. These functions help users obtain more consistent readings under different testing conditions.

The supplied electrode is used to detect the pH of liquid samples and transmit the measurement signal to the instrument. The electrode holder and adjustable support arm shown in the product photographs provide convenient positioning during measurement. This arrangement helps keep the electrode stable while samples are being tested.

The OHAUS STARTER 300 also includes measurement memory capable of storing up to 30 measurement records. This feature allows users to recall previously stored results when reviewing laboratory measurements.

The instrument is suitable for laboratories involved in chemical analysis, pharmaceutical research, food testing, environmental monitoring, educational experiments, and general scientific research. It can be used to evaluate the acidity and alkalinity of water, prepared solutions, chemical mixtures, and other compatible liquid samples.

Its compact measuring unit, digital display, simple keypad operation, and versatile measurement functions make the OHAUS STARTER 300 a practical instrument for everyday laboratory pH testing.

The pictured system includes the OHAUS STARTER 300 meter, electrode, connecting cable, and adjustable electrode support assembly. Actual accessories and operational condition should be confirmed before purchase.

2.1 Applications of the Product

• Chemical Laboratories: Measuring the acidity and alkalinity of chemical solutions and prepared laboratory samples.
• Pharmaceutical Laboratories: Monitoring pH levels during formulation development, solution preparation, and quality-control testing.
• Water Quality Testing: Measuring pH in water samples for environmental and general laboratory analysis.
• Food and Beverage Testing: Evaluating the pH of liquid food samples, beverages, and prepared solutions.
• Research and Development: Supporting analytical experiments and scientific investigations involving pH measurements.
• Educational Institutions: Demonstrating pH measurement, buffer calibration, and basic analytical chemistry procedures.
• Environmental Laboratories: Testing water samples and other compatible liquid samples for acidity and alkalinity.
• Industrial Quality Control: Checking pH levels during routine testing of process liquids and prepared solutions.

2.2 Product Features

• Genuine OHAUS STARTER 300 pH measurement instrument.
• Digital LCD display for clear measurement readings.
• pH measurement range from 0.00 to 14.00 pH.
• Millivolt measurement range from -1999 to +1999 mV.
• Temperature measurement range from 0°C to 100°C.
• pH resolution of 0.01 pH.
• Supports one-, two-, and three-point calibration.
• Four predefined calibration buffer groups.
• Automatic buffer recognition.
• Automatic and manual temperature compensation.
• Stores up to 30 measurement records.
• Simple keypad operation.
• Electrode connection through BNC input.
• Compact ABS instrument housing.
• Electrode holder and adjustable support assembly included as pictured.

2.3 Technical Specifications

Specification	Details
Brand	OHAUS
Product Series	STARTER
Model	STARTER 300 / ST300
Instrument Type	Digital pH Meter
Measurement Parameters	pH, mV, Temperature
pH Measurement Range	0.00–14.00 pH
mV Measurement Range	-1999 to +1999 mV
Temperature Range	0°C–100°C
pH Resolution	0.01 pH
mV Resolution	1 mV
Temperature Resolution	0.1°C
pH Accuracy	±0.01 pH
mV Accuracy	±1 mV
Temperature Accuracy	±0.5°C
Calibration	Up to 3 points
Buffer Groups	4 predefined groups
Temperature Compensation	ATC and MTC
Measurement Memory	30 measurements
Display	LCD
Electrode Input	BNC
Temperature Sensor Input	Cinch, NTC 30 kΩ
Power Supply	4 × AAA batteries (meter specification)
Housing	ABS
Protection Rating	IP54 (meter specification)

Technical specifications are based on the manufacturer's ST300 documentation. The pictured external electrode holder and support assembly are additional accessories and are not included in the dimensions of the portable measuring unit.

2.4 Product Condition

Condition: To be confirmed by seller.

The product is offered with the accessories visible in the photographs. Operational condition, calibration status, electrode condition, and completeness of accessories should be verified before dispatch.