AquaCheck Singlet Single Use Conductivity Solution | 2771520

Designed for fast, accurate calibration of conductivity meters, the Hach Singlet 2771520 is a ready-to-use, single-use potassium chloride (KCl) conductivity standard solution well suited to pool, spa, aquatic facility, municipal water, and laboratory QA/QC applications. Each pack ships with 20 individually sealed 20 mL foil pouches at a certified concentration of 12.88 mS/cm (±10% at 25°C), removing the preparation, storage, and contamination risks that come with traditional bulk calibration solutions. Because each pouch is sealed in foil, the solution is protected from air exposure and degradation between uses, so every calibration starts with a fresh, reliable reference standard. The workflow is simple: open a pouch, insert the electrode, calibrate the meter, and discard the pouch — there is no measuring, diluting, or cleanup involved. The 2771520 is compatible with Hach conductivity meters as well as with most third-party conductivity and TDS meters in common use.

Highlights

• 12.88 mS/cm Potassium Chloride Reference: Each foil pouch holds a 12.88 mS/cm potassium chloride conductivity standard certified to ±10% at 25°C, providing a reliable reference point for conductivity meter calibration that supports accurate decision-making in pool, spa, drinking water, and laboratory QA workflows.
• Sealed Foil Pouch Protection: A 20 mL dose is individually sealed inside each foil pouch to block air exposure, evaporation, and contamination between uses, an important advantage over bulk solutions that can lose accuracy as they sit partially used on a shelf or in a service vehicle.
• Open-and-Calibrate Convenience: Each pouch arrives pre-mixed and pre-measured at the correct concentration, eliminating dilution and weighing steps entirely — open, insert the electrode, calibrate, and discard — which cuts calibration time and removes a common source of user error during field and bench work.
• Field-Ready Spill-Resistant Format: The compact, sealed pouch design travels easily to pool facilities, waterparks, and remote field sampling sites without the spillage or breakage concerns associated with bottled standard solutions, supporting pool service professionals and water quality technicians performing routine on-site conductivity checks.
• Broad Conductivity Meter Compatibility: Built for use across Hach's full conductivity meter lineup and compatible with most other conductivity and TDS meters available, making the 2771520 a versatile calibration choice for facilities that standardize on Hach equipment as well as those operating mixed-brand instrument inventories.