The standard ME11 admittance probe uses very similar technology to capacitance to detect the product level but has an additional reference probe.
The probe will change output when the product enters the vicinity of, or makes contact with, the sensing probe. The advantage of this technology is that it can work with a considerable build-up on the probe without false switching as it can distinguish between a coating and product level. This operating principle relies on the dielectric properties of the media.
The pre-set material detection sensitivity suits most applications. Only when a sticky conductive material is to be detected may increased sensitivity be required. Unlike some competing products, the transmitter does not require replacement with a more sensitive model should sensitivity adjustment be required. A range selection switch and potentiometer are provided for maximum sensitivity adjustment flexibility.
Typical applications for admittance probes include:
- Acid tanks and silos
- Bitumen, tar and asphalt
- Adhesives, polymers and paints
- Syrups and pastes
- Powders, flakes and granules
