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Do you struggle with obtaining accurate water analysis results in rugged or wet environments?

The Starter 400M pH & Conductivity Portable from Liberty Scales offers an unparalleled solution. Engineered for extreme conditions, this lab-quality instrument combines robust construction with precision technology, ensuring reliable measurements of pH, conductivity, TDS, salinity, and resistivity anywhere you need it. A backlit LCD and rechargeable lithium battery enhance usability in the field, making it your go-to device for water analysis.

Key Benefits:

  • Versatile Measurement Range: Measures various parameters, including pH (2.00 – 16.00), conductivity, TDS, salinity, resistivity, and more, with high accuracy and resolution, catering to various testing needs.
  • Durability and Portability: IP67 waterproof plastic housing and probes and a protective rubber cover make this meter exceptionally durable and perfect for use in harsh environmental conditions.
  • Long Battery Life: The rechargeable lithium battery offers up to 40 hours of uninterrupted operation and over 300 recharge cycles, significantly reducing the frequency of battery replacements.
  • Data Management: Equipped with a built-in micro-USB port, the Starter 400M allows for easy data transfer, with storage capacity for up to 1000 data items, simplifying record-keeping and analysis.
  • User-Friendly Interface: Features intuitive software that guides users through setup and testing processes, displaying vital information such as electrode conditions on a large, easy-to-read LCD.
  • 5-Year Warranty: Enjoy peace of mind and long-term reliability with a comprehensive 5-year warranty on your investment.

By choosing the Starter 400M pH & Conductivity Portable, you are not just purchasing a meter but investing in peace of mind. The reliability and accuracy of your field measurements will improve significantly, ensuring that critical water quality parameters are always within your control. Whether for research, industrial, or environmental applications, this meter will make water testing more efficient and hassle-free, leaving you confident in your data and able to focus more on your work. With Liberty Scales' commitment to precision in laboratory instruments, this tool is essential for professionals who demand the best in water analysis, meters, and electrodes.

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: 0-20 MΩ•cm; -5 °C – 110 °C; -2.00 – 16.00 pH; 00.0 μS/cm – 199.9 mS/cm; 0.1 mg/L – 199.9 g/L (TDS); -1999 – 1999 mV; 0-99.9 psu

  • Accuracy: ± 0.5 % F.S.; ±0.3 °C; ±1 mV; ±0.01 pH

  • Measurement Resolution: 0.01 mg/L; 0.01 psu; 0.1 °C; 0.1 μs/cm; 0.01 pH; 0.01 Ω•cm; 1 mV

  • Display: LCD Backlit Display

  • Electrode: ST320 IP67 3m (Included); STCON3 IP67 3m (Included)

  • Accuracy ± (mV): 1 mV

  • Accuracy ± (Temperature): 0.3 °C

  • Battery Life: 40 Hours with Rechargeable Battery

  • Conductivity accuracy (±): 0.5 %

  • Conductivity measuring range: 0.01 μS/cm-199.9 mS/cm

  • Dimensions: 9.05 in x 1.57 in x 3.94 in (230 mm x 40 mm x 100 mm) (LxHxW)

  • Measurement Range (Temperature): -5 °C – 110 °C

  • Measurement Range: -1,999 mV – 1,999 mV

  • Net Weight: 0.77 lb (0.35 kg)

  • pH accuracy (±): 0.01

  • pH measuring range: -2 – 16

  • pH resolution: 0.01

  • Resistivity measuring range: 0 MOhm – 20 MOhm

  • Resistivity resolution: 0.01 MOhm

  • Resolution Cond. (Variable): 0.1 – 199.9

  • Resolution (Voltage): 1 mV

  • Temperature compensation: Automatic

  • Temperature resolution: 0.1 °C

  • Temperature Sensor: 30 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.