Capacitance Tank Alarms

Capacitance tank alarms offers reliable liquid level sensing when other methods won’t work. 

They can sense through large amounts of buildup from scale, coating, crystallization, or viscous liquids (even honey!) that leave large amounts of material clinging to the pipe. It is for these challenging level sensing applications that we developed this sensor.

Unlike conventional capacitance sensors mounted on the outside of a tank, these can be easily mounted from the top of the tank and require no calibration. And, unlike conventionally mounted capacitance sensors, they can be used with metal tanks.

ADVANTAGES OVER OTHER METHODS

When faced with challenging appications where float switches won’t work, most people think of ultrasonics. The reality is that there are many problems with ultrasonics. These include false readings due to foam, turbulence, vapor, floating objects, or tank structure. In addition there is the cost, and the tedious setup required. Who wants to plug a laptop into the sensor mounted on the top of a tank just to make a simple change to the alarm depth? Furthermore, the setup of ultrasonics sensors is quite finicky: they must not be too close to a tank wall, or often they need an isolation tube, and they must be mounted at a minimum distance above the liquid – usually an inconvenient distance.

Gizmo capacitance alarms are the best of both worlds: they avoid the installation problems of both conventionally mounted capacitance sensors (sensor mounted horizontally to the outside of a tank) and ultrasonics.  Gizmo capacitance sensors are mounted at the top of the tank vertically and can be easily adjusted by hand with one of our mounts.