Fuel tank top a wɔde ahyɛ dade a ɛnyɛ den a ɛkorɔn alarm level so .

Susuw float switch ho sɛ wo tank no Sentry a ɔyɛ komm no. 

A capsule a ɛyɛ buoyant—a wɔde nnuru a ɛko tia polypropylene anaasɛ ahwehwɛ a ɛyɛ 316 L dade a ɛnyɛ den a wɔde nnuru a ɛnyɛ den na ɛyɛe—glides a wɔmmɔ mmɔden biara wɔ nsu adum no so. 

Wɔde demmire ketewaa bi a wɔde magnet di dwuma a wɔde epoxy ayɛ mu, a nsu, wusiw ne wosow a wɔde ahyɛ mu koraa no ahyɛ mu. 

Bere a nsu no ma float no twetwe kɔ soro a wɔadi kan apaw no, magnetic field no dannan emu contacts no mu, na ɛma circuit no wie ntɛm ara. 

Power supply biara nni hɔ a ɛkɔ wire, span anaa zero biara nni hɔ a ɛbɛtwe