RF admittance level transmitterIntroduction:
WH-SDB100 RF admittance liquid level transmitterIt is a new type of level measuring instrument designed and manufactured using radio frequency admittance level control technology. Radio frequency admittance measurement technology, in simple terms, is a method of measuring the admittance of a high-frequency current measurement system. Point RF admittance technology is different from capacitance technology in that it uses three terminal technology to diversify the measured parameters. Radio frequency admittance technology, by introducing measurement parameters other than capacitance, especially resistance parameters, improves the signal-to-noise ratio of instrument measurement signals, thereby significantly enhancing the resolution, accuracy, and reliability of instruments; The diversity of measurement parameters also greatly expands the reliable application areas of instruments. A level control technology that improves the anti hanging material (the material adhered to the sensor is called hanging material) performance of the product, makes the work more reliable, measures more accurately, and has a wider applicability.

RF admittance level transmitterMeasurement principle:

RF admittance level transmitterIt is a new liquid level control technology developed from capacitive technology, which is anti hanging, more reliable, accurate, and has wider applicability. It is an upgrade of capacitive liquid level gauges. The meaning of admittance in radio frequency admittance is the reciprocal of impedance in electricity, which consists of resistive and capacitive components. Inductive components are synthesized from radio frequency and radio wave spectra, so radio frequency admittance can be understood as measuring admittance using high-frequency radio waves. When the instrument is working, the sensor of the instrument forms admittance with the pipe wall and the measured medium. When the liquid level changes, the admittance value changes accordingly. The circuit unit converts the measured admittance value into a liquid level signal output to achieve liquid level measurement.
Scope and characteristics of application:

RF admittance level transmitterBy adopting advanced radio frequency admittance technology, the defect of capacitive level switches that cannot eliminate the influence of conductive materials has been overcome.

Has the following characteristics:
1. Strong universality: suitable for various occasions, can detect particles, fly ash, conductive and non-conductive liquids, viscous materials;
2. Anti adhesion circuit: Advanced 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.
This level instrument operates reliably, with all technical indicators reaching the international level of similar products. It is widely applicable for alarm and control of liquids, slurries, dust, material levels, and the boundary between two liquids. In addition, the product has added on-site working status indication, which is a cost-effective, stable and reliable level switch.

RF admittance level transmitterTechnical parameters and indicators:

1. Range: rigid probe rod 0-125mm to 0-3000mm; flexible probe cable 0-0.125m to 0-8m;
2. Operating temperature: Electronic components -40 ℃ to 85 ℃; Probe -200 (or -55) ℃ to 230 ℃;
3. Power supply: 13-35VDC;
4. Output: two-wire 4-20mA or 20-4mA, set on site;
5. Minimum output current: 3.6mA;
6. Maximum output current: 28mA;
7. Load: RL=(VS-7.5)/0.02 Ω (825 Ω when powered by 24V);
8. Explosion proof: Intrinsically safe ExiaICT6, associated equipment EKZ231B; Isolation explosion-proof ExdIIBT4;
9. Shell protection level: IP65;
10. Process interface: 3/4 "NPT, 316 stainless steel thread, GB9116-88 carbon steel flange with PTFE airtight gasket;
11. Electrical interface: M20 × 1.5 one;
12. Insulation resistance: ≥ 50M Ω;
13. LCD display: accuracy 0.2%, display 0-1999, display units in mm, cm, m, voltage drop 5V, operating temperature -10 to 80 ℃;
14. Shell material: low copper aluminum alloy die-casting, sprayed with epoxy resin;
15. Accuracy: ± 0.5% FS;
16. Probe: Probe type uses temperature and rated pressure;
a、 Polytetrafluoroethylene cable type -200 to 230 ℃ 3.5 or 50MPa;
b、 316 stainless steel rod -200 to 230 ℃ 3.5 or 50MPa;
c、 Polytetrafluoroethylene rod -55 to 230 ℃ 3.5 or 7MPa.

RF admittance level transmitterTypical applications:

Conductive insulating liquid slurry: chemical, oilfield, papermaking, pharmaceutical, water and sewage treatment.
Powder, ash, powder: power plants, metallurgy, cement, chemical industry; Particle, broken coal, grain: two different types of liquid interfaces in power plants, metallurgy, grain, chemical industry, and interface (oil-water interface): oil fields, chemical industry, and petrochemical industry.