Zero-point gel COY8 Ready-to-use gel for validation, calibration, and adjustment of oxygen and disinfection sensors o Exact determination of the true zero point of your oxygen and disinfection / chlorine measuring points o Instantly ready to use: no additional chemicals or preparation necessary o Reusable within 24 hours after opening » Catalog link اتصل بنا للحصول على مزيد من المعلومات حول هذا المنتج الاسم الكامل Email رقم التليفون رسالة