Starter 300 Ohaus ST300D-G DO Meter

Starter 300 Ohaus ST300D-G DO Meter

The Starter 300 Ohaus ST300D-G DO Meter  is a portable, high-precision instrument designed to measure dissolved oxygen (DO) and temperature in water and other liquid samples. Built for environmental testing, aquaculture, wastewater monitoring, and laboratory analysis, this model offers dependable performance, intuitive operation, and excellent durability for both indoor and field use.

Key Features

The ST300D-G provides an extensive measurement range of 0.00–19.99 mg/L (0–400%) and 0–50°C, ensuring flexibility for a wide variety of testing needs. It delivers ±1% or ±0.3 mg/L accuracy for dissolved oxygen and ±0.3°C accuracy for temperature, enabling precise and repeatable readings even in demanding environmental conditions.

This model comes complete with the STDO11 dissolved oxygen electrode and the STTEMP30 temperature probe, ensuring stable performance and fast response times. Furthermore, its LCD display clearly presents readings in mg/L, ppm, or % saturation, allowing for quick and accurate data interpretation. Because it supports two-point calibration, users can easily maintain optimal accuracy in different sample conditions.

The automatic temperature compensation (ATC) feature ensures reliable measurements even when environmental temperatures fluctuate. Powered by four AAA (LR03) batteries, the device offers an impressive 250 hours of continuous operation, making it ideal for extended fieldwork or continuous laboratory use. Compact and lightweight, the ST300D-G weighs only 0.35 lb (0.16 kg) and fits comfortably in one hand, ensuring portability and convenience.

Technical Specifications

• Model: Ohaus Starter 300D-G (ST300D-G) Dissolved Oxygen Meter

• Measurement Range (DO): 0.00 – 19.99 mg/L; 0% – 400%; 0 ppm – 45 ppm

• Temperature Range: 0°C – 50°C

• DO Accuracy: ±1% or ±0.3 mg/L

• Temperature Accuracy: ±0.3°C

• Resolution: 0.01; 0.1 mg/L; 0.1°C

• Calibration: 2-point

• Display: LCD

• Electrodes: STDO11 (Included); STTEMP30 (Included)

• Temperature Compensation: Automatic (30 KΩ NTC Sensor)

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

• Battery Life: 250 hours

• 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 Parameter: Dissolved Oxygen / Temperature

Applications

The Ohaus ST300D-G is perfectly suited for environmental water testing, aquaculture oxygen monitoring, wastewater analysis, and scientific education. Because it offers automatic temperature compensation and two-point calibration, it ensures accuracy across various sample types and environmental conditions. Its long battery life and lightweight design make it especially useful for field researchers and technicians who require dependable measurements away from the laboratory.