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Do you need help to ensure accurate water quality testing in various environments?

The Ohaus Starter Pen Meter ST10S is your compact solution for reliable salinity measurements, brought to you by the trusted precision of Ohaus and Liberty Scales. This pen meter simplifies the complex water analysis process with its user-friendly design and accurate technology. Perfect for professionals in the field or laboratory settings, it offers a quick and straightforward way to monitor water quality without the bulk and hassle of traditional equipment.

Key Benefits:

  • Accurate Measurements: Enjoy peace of mind with measurements you can trust, thanks to the meter’s salinity range of 0.0 – 10.0 ppt and an accuracy of ±2.5% FS.
  • Versatile Applications: Capable of measuring pH, ORP, conductivity, DO, TDS, and temperature, making it a versatile tool for comprehensive water analysis.
  • Durable and Portable: It is designed with a robust ABS housing and a protective sensor cap that stands up to rough use in wet conditions and is ideal for fieldwork.
  • Long Battery Life: Equipped with an automatic shut-off feature and powered by 4 included 1.5V batteries, ensuring prolonged operation and energy efficiency.
  • Convenience at Hand: Its compact design and included wrist strap enhance portability and prevent accidental drops, ensuring your measurements are always within reach.
  • 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 ST10S, you’re not just getting a tool but embracing a hassle-free water analysis experience. Feel confident and empowered as you deliver accurate results effortlessly, whether in a lab or in the field. This meter is a testament to Ohaus's commitment to high-quality, durable laboratory instruments and Liberty Scales’ dedication to bringing top-tier equipment to your fingertips. Say goodbye to cumbersome setups and hello to streamlined, effective measurement with every use.

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: Salinity

  • Measurement Range: 0.0 – 10.0 ppt

  • Accuracy: ±2.5% FS

  • Measurement Resolution: 0.1 ppt

  • 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 – 10.0 ppt

  • 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.