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Chongqing Chuanyi RASSSU4XAPB080XDMHS RF Admittance Level Switch
RASSSU4XAPB080XDMHS
The RAS Series RF Admittance Level Switch is a highly reliable point level measurement solution designed for challenging industrial environments, capable of precise high and low level detection across liquids, slurries, sticky substances, fly ash, powders, and granular materials. Engineered with advanced driven-shield technology, this sensor effectively eliminates false alarms caused by severe material buildup or coating on the probe, ensuring maintenance-free and stable performance in high-temperature, high-pressure, and hazardous explosion-proof applications.
The RAS Series RF Admittance Level Switch represents the evolution of conventional capacitance level measurement technology, engineered specifically to overcome the common industry challenge of material buildup and probe coating. Utilizing an advanced three-terminal driven-shield circuit design, the instrument consists of a measuring electrode, a shield electrode, and a reference ground. When sticky or conductive materials adhere to the sensor probe, the active shield circuitry generates an identical electrical wave signal that isolates the measuring electrode from the vessel wall, effectively ignoring any parasitic capacitance or conductance caused by material buildup. The device measures only the true admittance variation between the sensing element and the tank wall, delivering pinpoint accuracy for point level detection in both liquid and bulk solid vessels.
This industrial level switch is built for extreme durability and versatile application flexibility across harsh industrial environments. Featuring a solid-state structure with no moving parts, the unit experiences zero mechanical wear, resulting in zero-maintenance operation and long-term operating stability. Its robust electronic architecture offers strong anti-interference performance, ensuring immunity to process steam, vapor, foam, condensation, and agitation. The device supports a broad operating temperature tolerance up to 1200°C with custom probe options, withstands process pressures up to 63 kgf/cm², and provides wide-range power input flexibility alongside adjustable relay output delays. With comprehensive intrinsic safety and flameproof explosion-proof certifications (Ex ia, Ex ia/db, EAC Ex), the RAS series is fully equipped to perform safely in hazardous gas and combustible dust atmospheres.
FAQ
Q: How does the RAS Series prevent false switching caused by sticky material buildup on the probe?
A: The RAS series uses a driven-shield probe architecture where the shield electrode maintains the exact same electrical potential and waveform as the measuring electrode. This eliminates current leakage through the material layer coating the probe, forcing the instrument to measure only the real material level inside the vessel.
Q: Can the RAS Series RF Admittance Level Switch be used in high-temperature and hazardous environments?
A: Yes, the series offers specialized high-temperature probe designs capable of enduring process temperatures up to 1200°C and process pressures up to 63 kgf/cm². It also carries comprehensive ATEX/EAC intrinsic safety and explosion-proof dust/gas certifications for hazardous areas.
Q: What mounting options and probe configurations are available?
A: The switch supports versatile top, side, and angle mounting using threaded process connections or ANSI/DIN/HG standard flanges. Probe options include rigid rod probes (0.15m to 1m), flexible cable probes (1m to 3.5m), and anti-corrosion PFA-insulated probes to suit diverse tank geometry and corrosive media.
Spécifications techniques
| Measurement Principle | Radio Frequency (RF) Admittance |
|---|---|
| Power Supply | 18V ~ 36V DC (Ripple < 100mVp-p) / 90V ~ 265V AC (50/60Hz) |
| Power Consumption | < 0.8W @ 24V DC / < 5VA @ 240V AC |
| Output Type | DPDT Relay / 2-Wire 8mA/16mA / NPN/PNP Transistor |
| Relay Contact Rating | 5A / 250V AC |
| Alarm Delay Time | 0 ~ 20 seconds adjustable |
| Measuring Range | 1 ~ 3300 pF |
| Resolution | 0.01 pF |
| Temperature Stability | 0.01% / °C |
| Max Process Pressure | Up to 63 kgf/cm² |
| Process Temperature | Normal: -40°C ~ 80°C / High Temp: Up to 1200°C (Customizable) |
| Ambient Temperature | Normal: -40°C ~ 80°C / Low Temp: -60°C ~ 80°C |
| Enclosure Protection | IP66 / IP67 |
| Process Connection | Thread (NPT / BSPT) or Flange (DN25 ~ DN250 / Class150 ~ Class300 / PN2.5 ~ PN63) |
| Probe Materials | 304 Stainless Steel / 316L Stainless Steel / PFA Insulation |
| Probe Types | Rigid Rod (0.15~1m), Flexible Cable (1~3.5m), Flat Type |
| Shield Length | 0cm, 9cm, 25cm, 40cm, 60cm, 80cm |
| Explosion-Proof Certifications | Ex ia IIC T2...T4 Ga, Ex ia IIIC T200135°C...T200300°C Da, Ex ia/db IIC T2...T4 Ga/Gb, Ex ia/tb IIIC T200135°C...T200300°C/T135°C Da/Db, EAC Ex |
| Cable Entry | 2 × M20×1.5 or 2 × 1/2" NPT |
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