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Struggling with unreliable and complicated water analysis?

Simplify your lab and fieldwork with the Ohaus Starter Pen Meters ST20S. This robust tool offers an intuitive, economical solution for accurate electrochemical measurement, making it an essential asset for any scientific or research setting. Designed for durability and ease of use, the ST20S ensures reliable readings, whether you're measuring pH, conductivity, or other critical water quality parameters.

Key Benefits:

  • Portable and Robust Design: With its lightweight and IP67 waterproof ABS housing, the ST20S can withstand harsh field conditions without compromising on performance.
  • Automatic Features: Equipped with an automatic shutdown function, the meter conservatively uses battery life, ensuring long-lasting operation without frequent replacements.
  • Clear and Accurate Display: The easy-to-read LCD screen provides precise readings, and the secondary information line on select models adds a layer of convenience for complex measurements.
  • User-Friendly: A protective sensor cap and a wrist strap enhance safety, preventing accidental damage and loss, making it perfect for on-the-go measurements.
  • Ready to Use: Comes with four 1.5V batteries and easily replaceable electrodes, allowing you to start your measurements immediately and maintain optimum performance over time.
  • 5-Year Warranty: Enjoy peace of mind and long-term reliability with a comprehensive 5-year warranty on your investment.

Imagine carrying out all your water analysis tasks with a simple, reliable instrument that fits right in your pocket. With the Ohaus Starter Pen Meters ST20S, you can achieve precise water quality measurements with minimal effort. The ease of use and dependable results will boost your productivity and give you peace of mind, knowing that your data is accurate and your equipment is robust. Elevate your laboratory and fieldwork experience with Liberty Scales' top-quality laboratory instruments. Dive your research confidently, and let the Ohaus Starter Pen Meters ST20S handle the rest.

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 – 80.0 ppt; 0.0 – 99.0 °C

  • Accuracy: ± 1.5% / ± 0.5 °C

  • Measurement Resolution: 0.1 ppt

  • Display: LCD

  • ATC: Yes

  • Temperature compensation: Automatic

  • Accuracy ± (Temperature): 0.5 °C

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

  • Battery Life: 200 Hours with Disposable Batteries

  • Calibration: 1 Point

  • Conductivity accuracy (±): 1.5 %

  • Conductivity measuring range: 0.0 – 80.0 ppt

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

  • Measurement Range (Temperature): 0 °C – 99 °C

  • Net Weight: 3.88 oz (110 g)

  • Number of Buttons: 3

  • Power: 4 AG13 Batteries (Included)

  • Protection Rating: IP67

  • Temperature Display: Yes

  • Temperature Range: 0 °C – 99 °C

  • Temperature Sensor: 50 KΩ NTC

  • 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.