HANNA GroLine 470 mV @ 25°C ORP Test Solution (500 mL)

Ensure your ORP (oxidation-reduction potential) electrodes are performing correctly with this high-quality 470 mV test solution. Crafted from reagent-grade chemicals in temperature-controlled production, it allows for fast—while accurate—verification: a properly functioning electrode should read within ±10 mV of the 470 mV benchmark when immersed. The solution is sealed in an airtight, tamper-resistant bottle with clearly printed lot and expiration details to guarantee freshness and traceability. Ideal for field use, lab checks, or routine maintenance, this reliable solution keeps your ORP measurements consistent and trustworthy.