Wi-Fi salt level sensors for water softeners. Purchase 100 EZsalt Sensors Wholesale. Please check availability to see when this order will be shipped. You can also email support@ezsalt.xyz to request shipping info after placing your order. If this is your first order you may also request a live video demo through the contact page of our website or by emailing our support email. For first time orders, we offer a 6 month buy back option which means: From the date the product ships to you, we offer a buy back on any sensors you have not sold after 6 months.