The VRF® II Series uses radio frequency to detect the presence or absence of material in a vessel. It compensates for the load of the probe and vessel environment to automatically determine the optimal operating frequency for the greatest sensitivity and stability.
The FOB is a unique feature that can determine if the unit is functioning properly without removing the cover; it can also be used to calibrate the VRF II. By being able to keep the unit in place and the cover on, the Test FOB can help save on unnecessary maintenance costs and troubleshooting. It is only available with Advanced units, but does also work with Remote units.
When a probe senses a change in the state of the level of material, it triggers the alarm; however, sometimes due to the characteristics of the material, like being sticky or an extremely fine powder, material will begin to adhere to the probe, which can cause a false alarm. Bindicator has probes specifically designed to ignore material build-up and only alarm when a change in level has been detected.
There are two installation options available for the VRF II - an integral unit combines the probe and the electronics into one unit or the remote option, separates the electronics away from the process. Remote units are used to either locate the electronics, including the indicator lights, in a more convenient location so they can be seen or serviced more easily or to move the electronics out of environments with higher operating temperatures. A remote unit may be mounted up to 100 ft (30 m) away from the probe.
VRFII is available with UL approval (for both the US and Canada) and CE marking (electromagnetic compatibility and low voltage directives) for ordinary locations or explosion proof and dust ignition proof hazardous area ratings. 3A Sanitary is also available for Food Grade applications.