Skip to content

Are you facing challenges in obtaining accurate and consistent water quality measurements?

The Ohaus Starter Pen Meter ST10R provides a dependable solution, equipped with state-of-the-art ORP technology to ensure precise readings every time. Crafted by Ohaus, a leader in measurement excellence for over a century, this compact, versatile tool is an essential addition to your laboratory instruments. Whether you're measuring pH, conductivity, or salinity, the Starter Pen Meter ST10R simplifies the process with fast and reliable results, right at your fingertips.

Key Benefits:

  • Comprehensive Measurement Capabilities: Offers a wide measurement range from -1000 to 1000 mV with an accuracy of 2mV, perfect for various water analysis needs including pH, ORP, conductivity, TDS, and salinity.
  • Durable and Portable Design: With its robust ABS housing and waterproof IP67 rating, this meter is designed to withstand harsh, wet environments, making it ideal for field and laboratory use.
  • User-Friendly Operation: Equipped with a clear LCD and simple operation powered by 4 included 1.5V batteries, ensuring you can get measurements quickly and efficiently without any hassle.
  • Automatic Features: Features an automatic shut-off to conserve battery life and easily replaceable electrodes to maintain optimal performance and longevity.
  • Convenience and Security: It comes with a wrist strap to prevent accidental drops, enhance durability, and ensure continuous operation.
  • 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 ST10R, you are not just buying a meter; you are investing in peace of mind. With this meter, you will feel confident and relieved, knowing that your water analysis is handled accurately and effortlessly. Embrace the simplicity and precision of Ohaus and take a step towards more reliable laboratory results with Liberty Scales' trusted technology. Let the Starter Pen Meters be your go-to solution for straightforward, accurate electrochemistry measurement without any restrictions.

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: ORP

  • Measurement Range: -1000 – 1000 mV

  • Accuracy: 2mV

  • Measurement Resolution: 1 mV

  • Display: LCD

  • ATC: Not Applicable

  • Temperature compensation: Not applicable

  • Accuracy ± (mV): 2 mV

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

  • Battery Life: 200 Hours with Disposable Batteries

  • Calibration: NA

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

  • Measurement Range: -1,000 mV – 1,000 mV

  • 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.