Scientific devices [bombay] offers side mounted magnetic level switch, model tls 9900. This is float mounted at one end of rigid rod and moves with change in level. The magnetic capsule at other end of rod moves accordingly within fixed limits. The switch contacts across the face change accordingly. Advantages: simple and proven design, operates in most liquid; and minimum maintenance and trouble free operation, low cost of ownership. Applications: high low level signals for alarm annunciation; safety interlock circuits; automatic pump control solenoid valve control; prevention of tank overflows; and pump safeguard against dry running.
