The ECHO VibraSwitch 200 Series for solids uses a piezoelectric crystal that vibrates at a known frequency. When the material comes in contact, the oscillation changes and forces a relay to activate. As the material lowers, the normal oscillation resumes and the relay goes back to normal state. The Single Blade (Stocktrol) and Dual Blade versions resist material build-up resulting in maintenance-free operation.
The ECHO RotoSwitch 300 Series is a range of rotating paddle level switches for monitoring and controlling bulk solids level. A synchronous motor rotates the paddle utlizing a magnetic drive. As the material rises the paddle rotation is impeded from moving and the increased motor torque activates the relay switch and stops the motor. A spring mechanism reactivates the motor and returns the switch to normal state.
The ECHO CapSwitch 500 is a reliable capacitance level switch with no moving parts. The state of the art sensing technology is Impulse RF Admittance measurement with an active guard. This provides excellent level detection while being insensitive to material buildup. It can be used for liquids, slurries, powders and bulk solid materials.