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Do you need help with unreliable water quality measurements in your laboratory or field studies?

The Ohaus Starter Pen Meter ST10T-A, presented by Liberty Scales, provides a solution by offering precise measurements of total dissolved solids (TDS) up to 100.0 mg/L with an accuracy of ±2.5% FS. Ideal for a wide range of applications, including pH, conductivity, salinity, and more, this compact meter delivers high performance in both laboratory and environmental settings.

Key Benefits:

  • Versatile Measurement Range: Measures 0.0 – 100.0 mg/L, making it suitable for a variety of water analysis applications.
  • High Accuracy: Ensures reliable readings with an accuracy of ±2.5% FS, crucial for critical water quality assessments.
  • Durable and Waterproof: With its robust IP67-rated ABS housing, the meter is built to withstand rough, wet environments, ensuring long-lasting use.
  • Portable and User-Friendly: Compact and economical, the pen meter is designed for straightforward operation with automatic shut-off feature to conserve battery life.
  • Enhanced Readability: Features a clear LCD display with secondary information line for easy reading of measurements.
  • 5-Year Warranty: Enjoy peace of mind and long-term reliability with a comprehensive 5-year warranty on your investment.

When you choose the Ohaus Starter Pen Meter ST10T-A, you’re not just getting a tool; you’re investing in peace of mind. With its reliable performance and durable construction, you can conduct thorough water analyses with confidence. Feel the satisfaction of having precise data at your fingertips, enabling more accurate decisions for environmental management or laboratory research. Liberty Scales guarantees that this essential lab instrument will enhance your water analysis capabilities, making your workflow smoother and more efficient.

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!


  • Meter Type: TDS

  • Measurement Range: 0.0 – 100.0 mg/L

  • Accuracy: ±2.5% FS

  • Measurement Resolution: 0.1 mg/L

  • Display: LCD

  • ATC: Not Applicable

  • Temperature compensation: Not applicable

  • Automatic Shutdown: Yes, After 6 minutes of non-use

  • Battery Life: 200 Hours with Disposable Batteries

  • Calibration: NA

  • Conductivity accuracy (±): 2.5 %

  • Conductivity measuring range: 0.0 – 100.0 mg/L

  • Dimensions: 1.5 in x 7.28 in x 1.77 in (38 mm x 185 mm x 45 mm) (LxHxW)

  • Net Weight: 3.88 oz (110 g)

  • Number of Buttons: 1

  • Power: 4 AG13 Batteries (Included)

  • Protection Rating: IP67

  • Temperature Display: Not Applicable

  • Working Environment: 50°F – 104°F, 85%RH, non-condensing (10°C – 40°C, 85% RH, non-condensing)

  • Wrist Strap: Yes
  • 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.