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Point level switches detect one fixed level and give an on/off signal for high-level (overfill) or low-level (empty) alarm, pump dry-run protection and plugged-chute detection. Instranova offers vibrating fork, rotary paddle, float and ultrasonic point switches, so you can match the technology to the medium – liquid or bulk solid – and the vessel.
Point level switches
Tuning Fork Level SwitchVibrating fork for liquids, powders and light solids; no moving parts, immune to buildup and foam.
Rotary Paddle Level SwitchMotor-driven paddle for heavier bulk solids in silos, bins and hoppers; adjustable torque.
Float Level SensorBuoyant magnetic float with reed set points for simple liquid level switching.
Ultrasonic Level SwitchNon-contact external point switch for liquids, with no wetted parts.
Choosing a point level switch
| If you need to detect | Best choice |
|---|---|
| Liquids, powders or light solids with buildup, foam or turbulence | Tuning Fork Level Switch |
| Heavier, free-flowing bulk solids in silos and bins | Rotary Paddle Level Switch |
| Simple liquid level in a tank or sump, no power at the switch | Float Level Sensor |
| A liquid point with no wetted parts, mounted outside the vessel | Ultrasonic Level Switch |
For continuous level rather than a fixed point, see radar, ultrasonic and hydrostatic level sensors.
FAQ
What is a point level switch?
A point level switch detects whether material has reached one specific level and gives an on/off contact, rather than a continuous reading. It is used for high-level overfill cutoff, low-level or empty alarm, pump dry-run protection and blocked-chute detection.
Which point switch is best for bulk solids?
For heavier free-flowing solids in silos and bins a rotary paddle switch is the usual choice; for fine powders and light or sticky solids a tuning fork switch is better because it has no moving parts and shakes off buildup.
Which point switch is best for liquids?
A tuning fork works in almost any liquid regardless of foam, turbulence or conductivity. A float switch is a simple, low-cost option for clean liquids, and an ultrasonic switch suits liquids where you want no wetted parts.
Request a quote
Tell us the medium, its density and temperature, the vessel and the mounting point, and we will recommend and configure the right point level switch.