The Hanna HI7031L is a premium 1413 µS/cm conductivity standard in a 500 mL bottle — the most common calibration point for low-range EC and TDS measurement.

Key features

• Prepared against NIST-traceable potassium chloride (SRM 2202) per ISO 3696/BS3978
• Temperature-vs-conductivity chart printed on each bottle; lot number and expiration date marked
• Air-tight, tamper-proof bottle; 5-year unopened shelf life

Use with: Hanna EC/TDS meters (HI99300, HI98129/HI98130, HI2030, HI6321, HI98199 with EC probe). What's included: one 500 mL bottle of 1413 µS/cm standard.

Browse meters in our Hanna WQ Meters collection.

Estimated shipping weight: 1.3 lb.