Introduction
HBOR is an intelligent sensor with a built-in
microprocessor. It is designed to detect and
control oil levels in oil pots.
Apart from the sensor function, it also has a built-
in controller.
The controller can be setup with all the
parameters that are necessary to directly
regulate solenoid valves for oil level control.
Measurement Principle
The sensor is a capacitative sensor. The capacitative measurement principle is based on the electrical
properties in the proximity of a capacitor. A capacitor is an electrical component that is capable of building
and sustaining an electrical charge
Principally, a capacitor consists of two plates.
When a charge is applied to a plate, the other
plate will be charged with the opposite polarity
and retain the charge until it has been grounded.
The magnitude of the charge (the capacitance)
that can be generated depends, among other
things, on what is found between the plates.
The substance between the plates is referred to
as a dielectric.
In front of the two plates, the sensor for level
measurement is shaped as a cylindrical rod.
When liquid covers the sensor, the measured
capacity is changes.
.
The conductivity of a material can vary depending
on temperature, chemical composition, and the
homogeneity of the material, and therefore it can
in some cases require a different factory
calibration.
Design
The sensor consists of a mechanical part and an electronic part. These are easily separated by loosening 2
grub screws, or for mechanisms with mounting tabs, by pressing the electronic part in towards the
mechanical part and turning the housing counter-clockwise until a wave washer pushes it from the
mounted position. The electronic part is designed in accordance with IP65 waterproof rating and to resist
vibrations.
The mechanical part is produced in AISI304/PTFE and tested to withstand high pressure.
Software
The sensor is supplied with the latest firmware. The sensor is configured with a configuration tool, using a
PC. It is capable of determining on its own the current version which was delivered.
The newest version of the tool is backwards compatible.
It is not possible to update the software on a sensor which has already been delivered.
