Starter 400 Ohaus ST400D-B DO Meter

Starter 400 Ohaus ST400D-B DO Meter

The Starter 400 Ohaus ST400D-B DO Meter is a compact and high-precision device designed to measure dissolved oxygen (DO) and temperature with exceptional accuracy. Built for laboratory, environmental, and field applications, this portable meter combines reliability, efficiency, and ease of use, ensuring consistent performance across diverse testing environments.

Key Features

The ST400D-B offers a measurement range of 0.00–20.0 mg/L (ppm) for dissolved oxygen and 0–50°C for temperature. Furthermore, it delivers high accuracy, achieving ±0.2 mg/L for readings below 8 mg/L and ±0.3 mg/L for readings between 8–20 mg/L. Its temperature accuracy of ±0.3°C ensures precise data even under fluctuating environmental conditions.

The meter features a color LCD graphic display, which provides clear and intuitive visualization of results, making operation effortless. Additionally, its automatic temperature compensation (ATC) ensures stable readings across varying temperatures. The device also supports two-point calibration, allowing for optimized accuracy during repeated use.

Although the STDO21 electrode is available separately, it can be easily connected to achieve reliable oxygen detection. Moreover, the lightweight and ergonomic design enhances portability, while the 12-hour battery life using standard AAA batteries allows uninterrupted measurements during fieldwork.

Technical Specifications

• Model: Ohaus Starter ST400D-B DO Meter

• Measurement Range (DO): 0.00–20.0 mg/L (ppm)

• Measurement Range (Temperature): 0°C–50°C

• Accuracy (DO): ±0.2 mg/L (<8 mg/L); ±0.3 mg/L (8–20 mg/L)

• Accuracy (Temperature): ±0.3°C

• Resolution (DO): 0.01 mg/L

• Temperature Resolution: 0.1°C

• Display: Color LCD Graphic Display

• Electrode: STDO21 (Available as accessory)

• Temperature Compensation: Automatic (10 KΩ NTC Sensor)

• Battery Life: 12 hours (4 AAA Batteries Included)

• Power Supply: 4 × AAA (LR03) Batteries

• Calibration: 2-Point Calibration

• Net Weight: 0.35 lb (0.16 kg)

• Dimensions (L × H × W): 5.91 × 1.38 × 3.54 in (150 × 35 × 90 mm)

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

• Measured Parameters: Dissolved Oxygen (DO) / Temperature

Applications

The Ohaus ST400D-B is well-suited for water-quality monitoring, aquaculture management, wastewater treatment, and environmental research. Because it provides quick stabilization and high accuracy, users can depend on it for testing dissolved oxygen in rivers, lakes, aquariums, and other aquatic systems. Additionally, its portable design and easy calibration process make it ideal for technicians and scientists who need reliable results on the go.