At only 0.63 inch diameter, the Keller Microlevel is ideally suited for liquid level measurement applications that demand small size and high performance. It offers outstanding Total Error Band (TEB) standard accuracy, analog + digital outputs, custom pressure ranges up to 900 ftWC, 3-day lead time, guaranteed lightning protection, and carries NSF/ANSI 61 & 372 approvals for use in drinking water.