Our company is very pleased to offer you Hach Chemistry quality controls or calibrators or standards for your application. As a scientist you are aware how the quality of any lab equipment helps you to determine how much time you may spend on a task along with the level of quality of your data. Finding the optimum model of Hach Chemistry quality controls or calibrators or standards can sometimes be a challenging activity; but with the expertise of our product experts here at LabPlanet you can be certain you've chosen the proper equipment for your application. Our product specialists possess over 15 years combined expertise in laboratory products and they are here from 7am to 5pm CST to assist you. Are you actually not in the USA? Working very late and have an important question? Then email us at sales@labplanet.com and we will promptly email you with help. Perhaps you intend a purchase and desire pricing along with availability; then you should call or alternatively send us an email and we will be able to send out an offer that includes lead times for delivering to your specific location.![]()