Aurical offers traditional conductivity calibration standards. All standards are made fresh to order ensuring the end user receives the freshest most accurate standards with the longest possible shelf life. Traditional standards are generally in the range of 147 uS/cm up to 180 uS/cm but at Aurical what you order is what we make which enables the purchaser to specify any value needed for their specific project and Aurical will make it. We package your solution in either our proprietary stand up pouch or in the traditional polypropylene bottles. All conductivity standards regardless of value are available in 250 mL ( stand up pouch only), 500 mL, 1 Liter, 4 Liter, 20 Liter cubitainer or in the single use 20 mL pouches which come 20 pouches per box.