GCD300 series RF level switch

Product Features	The GCD300 series capacitive level switch adopts advanced capacitive technology, which has solved the problem of RF admittance switches
	Defects that can eliminate the influence of conductive hanging materials. The instrument operates reliably, and all technical indicators meet the standards of similar international products
	Horizontal, widely applicable for liquid, slurry, dust, material level, and ultra-high temperature material alarm and control. In addition,
	The product has added on-site working status indication, which is a highly cost-effective and stable level switch.

application area	GCD300 is a limit level sensor with partially insulated capacitive electrodes used for measuring limit levels.
	Can be used in all fields of industrial processes, mainly in the field of solid materials. But limit switches can also be used for liquids,
	Typical applications include overflow and dry motion protection. The principle of capacitance measurement does not impose too many requirements on installation, therefore
	Can equip more application scenarios.

Working principle	Measure the electrode, medium, and container to form a capacitor. The capacitance of a capacitor is mainly influenced by three factors.
	Functional principle - Board capacitor electrode:
	1. Distance from electrode surface
	2. Electrode surface size
	3. Dielectric type between electrodes
	That is, the electrode and container wall are capacitor plates, and the medium is electrolyte. Due to the higher relative humidity of the medium compared to air
	The influence of dielectric constant increases the capacitance of a capacitor as the electrode coverage increases, and the change in capacitance is influenced by electronic insertion
	Convert the item into a switch command.

External dimensions

The GCD300 series consists of the following components: ·Instrument cover ·Shell with electronic components ·Process connection and electrodes

1. Shell cover;2. Shell with electronic components; 3 process connections; 4. Protecting electrodes; 5. Measuring electrode

power supply	The GCD300 series is an integrated instrument that does not require the connection of additional computing instruments. Integrated electronic components
	Analyze and calculate the level signal, and provide switch signals. This switch signal can directly control the devices connected later
	(For example: alarm system, DCS or pump, etc.). The power supply voltage of GCD300 series is shown in the "Selection Table"

sensitivity	The measuring electrode can adapt to the dielectric constant of the medium through electronic components. It can be measured when the electrode is covered or measured
Adjust	Provide a switch signal when the electrode is not covered. The following display and adjustment components can be found on electronic components:
	Clockwise adjustment increases sensitivity, counterclockwise adjustment decreases sensitivity. When switched to red green conversion, the sensitivity is highest.
	·LED display light is used to show the switch status (green/red)
	·Potentiometer for adjusting switch points

Wet environment	Apply the recommended connecting cable and tighten the cable entry. To prevent moisture, it is necessary to connect the cable in front of the cable entrance
	Down. In this way, rainwater and condensate can drip down along the hanging cables. This corresponds to outdoor installation or
	It is important to install in damp places (such as cleaning with water, heating or cooling).

	Measures to prevent moisture infiltration
	If condensation appears on the container lid, the flowing liquid will form a bridge, leading to circuit failure. Therefore, please
	Use a shielded tube or a longer insulated tube. Its length depends on the condensation capacity and the flow of the medium.

Installation position	If the instrument is installed in the filling flow, it will cause measurement errors. Therefore, please install the instrument without being affected
	The location affected by interference from filling holes.

	If there is a need to install a short tube, the protective electrode should be extended out of the short tube to avoid instrument errors caused by the accumulation of aggregates in the short tube
	The action in the solid material bin will form a conical pile, which will change the switch point. Therefore, please pay attention to this during the installation process
	Point. Therefore, it is recommended to choose a measuring electrode that can measure the average value of the conical material pile at the installation position.
	It must be installed according to the layout of the filling and emptying ports in the container. To compensate for the conical solid material in cylindrical containers
	The measurement error caused must be installed with the instrument at a distance of d/6 from the container wall

Order Selection Table