The BM 500 liquid-level measuring device is a hygienic unit with a stainless steel body and a seal-free setup. The potentiometric setup is made for conductive materials and helps measure levels in smaller vessels. Perfect for caking products, it evaluates units of all sorts with a signal from 4-20mA. The safe, hygienic sleeve has a high temperature rate of 140 degrees Celsius or 285 degrees Fahrenheit and works well to keep the unit sterile. The good CIP cleaning setup makes it active.