Starter 300 Ohaus ST300-B PH Meter

Starter 300 Ohaus ST300-B PH Meter

The Starter 300 Ohaus ST300-B PH Meter is a compact and portable electrochemical instrument designed for accurate pH, mV (ORP), and temperature measurements. It combines user-friendly operation with dependable precision, making it an excellent choice for both laboratory and field applications. Ideal for education, water analysis, and quality-control processes, this model offers professional-grade performance at an accessible level.

Features

The ST300-B delivers high-accuracy results across a wide measuring range: 0.00 to 14.00 pH, –1999 to +1999 mV, and 0°C to 100°C. It ensures reliable readings with accuracies of ±0.01 pH, ±1 mV, and ±0.5°C, while the measurement resolution of 0.01 pH, 1 mV, and 0.1°C enhances precision for sensitive testing applications.

Equipped with a clear LCD display, the meter provides excellent readability even in bright outdoor conditions. Moreover, its simple interface and 3-point calibration function make it easy to set up and operate, ensuring consistent performance across multiple buffer standards. Although the ST320 electrode is sold separately, the meter is fully compatible with it, enabling smooth integration for users who require high-precision measurements.

The ST300-B runs on four AAA (LR03) batteries, providing up to 500 hours of continuous operation. Because it includes automatic temperature compensation (ATC), it automatically adjusts readings to account for environmental temperature changes, ensuring consistent accuracy. Additionally, its lightweight body (0.35 lb / 0.16 kg) and compact design make it convenient to carry and ideal for field testing.

Specifications

• Model / Part Name: Ohaus Starter 300-B (ST300-B) pH Meter

• pH Measuring Range: 0.00 – 14.00 pH

• pH Accuracy: ±0.01 pH

• mV Measuring Range: -1999 – +1999 mV

• mV Accuracy: ±1 mV

• Temperature Range: 0°C – 100°C

• Temperature Accuracy: ±0.5°C

• Temperature Compensation: Automatic (30 KΩ NTC Sensor)

• Measurement Resolution: 0.01 pH; 1 mV; 0.1°C

• Calibration Points: Up to 3

• Display: LCD

• Electrode: ST320 (Available as an accessory)

• Power Supply: 4 × AAA (LR03) Batteries (Included)

• Battery Life: 500 hours (typical use)

• Net Weight: 0.35 lb (0.16 kg)

• Dimensions (L × H × W): 6.69 × 1.38 × 3.54 in (170 × 35 × 90 mm)

• Working Environment: 5°C – 40°C, 80% RH, non-condensing

• Measured Parameters: pH / mV (ORP) / Temperature

Applications

The Ohaus ST300-B pH Meter is widely used in educational laboratories, water-quality testing, environmental monitoring, and industrial inspection. Because of its portability and automatic temperature compensation, it delivers consistent results in both indoor and outdoor environments. Additionally, it is ideal for applications where quick calibration, dependable accuracy, and long-lasting battery performance are required.

Furthermore, its lightweight and ergonomic design ensures comfortable handling during extended measurement sessions. The ST300-B can be easily transported between workstations or sampling locations, making it a practical tool for on-site testing and laboratory work alike.