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CHAPTER 1. PRODUCT DESCRIPTION
FUNCTION
The VRF-1000 is a line powered (AC or DC) material level sensor that outputs a DPDT relay contact.
The electronics and probe are integral. It is a point level sensor used to detect the presence or absence
of material at a point inside a tank, bin, or other vessel. Material coming in contact with the unit's probe
causes its output relay to change state, thereby indicating to the user the presence of material.
Operation of the VRF-1000 is based upon the Bindicator
Opti-Sense™ technology using Variable Radio
®
Frequency (VRF™) which automatically selects the optimal operating frequency (20kHz to 100kHz) of
the low voltage signal applied to the probe, depending on the probe circuit impedance.
A dual core microprocessor scans the probe circuit and digitally analyzed voltage and current values to
characterize the complex impedance seen by the probe. The digital signal processor continuously
analyzed the conductance and susceptance of the probe circuit and calculates when to alarm the unit.
APPLICATIONS
This model is ideal for the point level detection of granulars, powders, liquids, and slurries. In addition, it
is effective in the measurement of materials with a dielectric constant as low as 1.2.
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