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Are you struggling to obtain accurate dissolved oxygen readings in diverse environments?

The Starter 400D DO Portable, a pinnacle of OHAUS craftsmanship, offers a sophisticated solution to your water analysis needs. This device, designed with the rigors of laboratory and field applications in mind, integrates cutting-edge optical technology to deliver precise and effortless measurements without requiring complex preparations or extensive maintenance.

Key Benefits:

  • Optimal Accuracy and Range: Measure dissolved oxygen from 0.00 to 20.0 mg/L with a resolution of 0.01 mg/L, ensuring high precision across its full range.
  • Enhanced Readability: Features a large, backlit color LCD that remains clear and readable in low-light conditions, perfect for outdoor and on-site testing.
  • Robust and Reliable Design: Constructed with durable ABS housing and an IP54 rating, the meter is designed to withstand harsh environmental conditions.
  • Convenient Memory Function: Equipped with a 99-measurement library and the ability to recall the last calibration data, enhancing the efficiency of repeated tests.
  • Advanced Calibration Capabilities: Automatic barometric pressure and temperature compensation, with manual salinity adjustment for varied water types.
  • Portability and Ease of Use: Powered by 4 AAA batteries and designed with portability in mind, complete with a wrist strap and a practical meter stand for field applications.
  • 5-Year Warranty: Enjoy peace of mind and long-term reliability with a comprehensive 5-year warranty on your investment.

Imagine never having to second-guess the accuracy of your water analysis again. With the Starter 400D DO Portable Meter, you'll experience the peace of mind that comes with reliable, precise data collection. Perfect for environmental scientists, aquaculture managers, and water quality technicians, this meter not only simplifies your work but also enhances your results' quality. Embrace the assurance of having a top-tier instrument from Liberty Scales, a leader in laboratory instruments and water analysis solutions.

Reach out to our dedicated team for further information and personalized assistance. Call us at (661) 888-1919 or email us at We're here to help you every step of the way!

  • Measurement Range: 0.00 – 20.0 mg/L(ppm); 0 – 50°C

  • Accuracy: ±0.2 mg/L(< 8 mg/L) or ±0.3 mg/L(8~20 mg/L); ±0.3 °C

  • Measurement Resolution: 0.01 mg/L; 0.1%; 0.1 °C

  • Display: Color LCD Graphics

  • Electrode: STDO21 (Included)

  • Accuracy DO: 0.2 ppm

  • Accuracy ± (Temperature): 0.3 °C

  • Battery Life: 12 hours with Disposable Batteries

  • Calibration: 2 Point

  • Dimensions: 5.91 in x 1.38 in x 3.54 in (150 mm x 35 mm x 90 mm) (LxHxW)

  • In-Use Cover: No

  • Measurement Range DO: 0 ppm – 20 ppm

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

  • Net Weight: 0.35 lb (0.16 kg)

  • Parameter: Dissolved Oxygen

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

  • Resolution (DO): 0.01

  • Temperature compensation: Automatic

  • Temperature resolution: 0.1 °C

  • Temperature Sensor: 10 KΩ NTC

  • Working Environment: 41°F – 104°F, 80% RH, Non-condensing (5°C – 40°C, 80% RH, Non-condensing)
  • Free Shipping: Available across 48 continental USA. Extra charges may apply for residential, farm, or rural areas.
  • Express Shipping: Overnight and faster shipping options available at additional costs. Quotes obtainable via email.
  • Delivery Time: Typically 5 to 7 business days, varying by location and external conditions.
  • Tracking Information: Provided via email upon shipment. Accessible through account login. Additional information available upon request.
  • Return Policy: 15-day return period for unused, original condition products. A 25% restocking fee applies. Buyer covers original and return shipping costs.
  • Customer Support: Contact at (661) 888-1919 or for queries or concerns about shipping.