Measure the tank depth and the calculator returns the exact sender length, with the gauge standard sorted before anything is built.
Measure your tank, we'll size the sender
Depth is the inside measurement, mounting flange to the bottom of the tank, straight down.
Your sender
Reed-switch senders in 316 stainless suit diesel, water, waste and oil alike — one sender family for every tank on board. Mounting options: SAE 5-bolt flange, BSP 1¼″ and NPT 1½″ — tell us which your tank has when you order. Senders are cut and built to order (special order, typical lead ~15 days; NPT ~30).
Pick your length on the product page, or email us the tank details — depth, fluid, mounting — and we'll confirm the right sender and gauge match before anything is built.
View & order this sender Email us my tank details
Get the right sender for your tank
Measured your depth with the calculator? We supply the matching 316 stainless marine tank level sender / sensor in lengths from 150 to 2000 mm, and a high-resolution 10 mm-step sender for shallow fuel, water and holding tanks. Reed-switch, IP67, 0–190 Ω or 240–33 Ω output — compatible with most marine gauges. Browse the full tank gauges & senders range — shipped from Thailand, delivered worldwide. New to senders? Read our guide to measuring and choosing a tank level sensor.