RF admittance level switch

JYSP-010-350-DRF admittance level switchDue to the presence of the protective electrode, the detection circuit compares the signals of the detection electrode and the protective electrode to overcome the influence of material adhesion on level measurement. It is a point measurement product based on the principle of radio frequency admittance. This instrument has the advantages of high stability, high measurement accuracy, and wide application scenarios. Compared to traditional capacitive level switches, the product adopts a modular design and is equipped with indicator lights, allowing users to intuitively obtain the required information, facilitating setting and maintenance. The structure of the product is divided into two parts: the main electrode and the compensating electrode.

JYSP-010-350-DRF admittance level switchProduct Details

Features:

1. Strong universality: suitable for various occasions, can detect particles, fly ash, conductive and non-conductive liquids, viscous materials;

2. Anti adhesion circuit: The anti adhesion circuit design can eliminate false error signals caused by material adhesion;

3. Power loss protection mode: low or high fault alarm. On site adjustable.

4. Easy installation and adjustment

5. Not afraid of sticking or hanging materials

6. Stability, unaffected by temperature

7. Delay output adjustable

8. Optional temperature resistance up to 550 ℃

9. High and low position failure protection function

Radio frequency admittance principle measurement technology is an improved level measurement technique. This series of products applies radio frequency signals and incorporates driving shield circuits to shield interference signals and signals generated by non-material changes. The driving shield circuit can prevent radio frequency current from forming a loop through the hanging material, and the effects generated by the hanging material can be identified. The impact of the hanging material can be eliminated from the total output through the equal shift processing of the bridge, which has strong anti-interference and anti hanging capabilities. Radio frequency admittance technology has high measurement accuracy and is not affected by probe hanging, making it a widely used measurement technology in various applications.

Technical Specifications:

1. Power supply voltage: 220cac ± 15% 50Hz; 24vdc ± 5%;

2. Power consumption: 4W;

3. Output signal: Relay output double pole double throw (dp/dt); 5a (resistive), 220vac;

4. Environmental temperature: -40~70 ℃;

5. Sensitivity setting: 0.5~500pf (adjustable);

6. Delay time: adjustable from 0 to 30 seconds (on or off);

7. Power loss protection mode: low or high fault alarm, adjustable on site.

Introduction to the working principle of RF admittance level gauge:

The important difference between point-to-point RF admittance technology and capacitance technology is the use of three terminal technology. A wire is drawn out from the measurement signal of the circuit unit, amplified by a in-phase amplifier, and its output is connected to the shielding layer of the coaxial cable, and then connected to the shielding layer of the probe. The Xinda instrument is capable of responding to people's enthusiasm, increasing the number of people in the dish, and producing signals with equal potential, phase, and frequency to the input signal, but isolated from each other. The ground wire is the outer cloud of the cable. Due to the shielding relationship between J and H, there is no potential difference between the two, so there is no current flowing through them. Therefore, there is no current leaking from the centerline, and there is a fear that there will be capacitance or zero capacitance towards Han 0 after three days. Therefore, the temperature effect of the cable and the installation of capacitors will not have any impact. For the hanging and curling of the probe, a different probe structure with five concentric layers is used: the inner layer is the central measuring rod, the middle is the central shielding layer, and the outer layer is the grounding installation thread, which is isolated by an insulation layer.

Radio frequency admittance level meters are widely used in several typical applications, including chemicals, plastics, films, feed/grains, rubber, pharmaceuticals, liquids, wastewater, sand, food, mud, cement, powders, coatings/clothing, coal, granular solids, oil, pulp, etc.