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Are you struggling with unreliable data during field water testing?

The Starter 400M pH & Conductivity Portable from Liberty Scales is your solution. Engineered for precise and robust water analysis, this meter ensures dependable readings of pH, conductivity, TDS, salinity, and resistivity. Its rugged, waterproof design and intuitive operation make it an indispensable tool for laboratory professionals working in challenging environments.

Key Benefits:

  • Wide Measurement Range: Covers everything from pH (2.00 – 16.00) to conductivity and TDS, ensuring versatile applications.
  • Durable and Waterproof: IP67-rated housing and probes and a protective rubber cover make this meter suitable for prolonged use in wet or harsh conditions.
  • Long Battery Life: A rechargeable lithium battery provides up to 40 hours of uninterrupted use and supports over 300 charge cycles, significantly reducing downtime.
  • Ease of Use: Features an easy-to-read backlit LCD and intuitive software that guides you through all testing processes.
  • Data Management: Equipped with a micro-USB port for seamless data transfer, helping you maintain records and analyze trends efficiently.
  • 5-Year Warranty: Enjoy peace of mind and long-term reliability with a comprehensive 5-year warranty on your investment.

Experience the confidence of conducting comprehensive water tests with the Starter 400M pH & Conductivity Portable. With this meter, field challenges become a thing of the past. Feel the relief and satisfaction of obtaining accurate, reliable results every time, ensuring your critical water quality measurements are always on point. Enhance your field testing capabilities today and make data discrepancies and testing interruptions a distant memory.

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.