The HI707-25 are high-quality reagents that are pre-measured

Great for hydroponics

extending the life of your electrode

01 mS/cm EC Accuracy @25°C/77°F ±2% F

Laboratory research & quality control testing

GroLine 5000 uS/cm Conductivity Standard Sachets, 20 mL (10 -Packs) NIST traceable conductivity standard The HI707-25 are high-quality reagentsHI70039 10 packs is a high quality 5000 uS cm conductivity standard designed with hydroponics, aquaponics, and greenhouses in mind. Single use sachets are highly portable, with a small footprint and a lightweight design. They are the perfect accessory for your on the go testing, fitting easily into your pocket or carrying case. Supplied with Certificate of Analysis Single use sachets for convenience. Perfect for use with GroLine testers and portable