Float Level Switch – Reliable Liquid Level Detection Across Industries
Float level switches are widely used in industrial and commercial applications to detect liquid levels in tanks, vessels, and pipelines....
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Level Switches
RF Admittance Level Switch
Reliable level detection for sticky, coating, and difficult materials in industrial processes
Designed to eliminate false alarms caused by material adhesion
Active guard technology for stable and accurate switching
Suitable for powders, particles, liquids, and viscous materials
Industrial-grade design for harsh and hazardous environments
OEM / ODM configuration available for project-based integration
A proven solution for applications where capacitive and mechanical level switches fail.
Procurement & Risk-Reduction Perspective
In many industrial applications, level switches fail not because of poor quality, but because material adhesion and coating interfere with measurement. Traditional capacitive or mechanical switches often require frequent cleaning, recalibration, or replacement.
Instrava RF admittance level switch is designed to address these challenges:
Eliminates false measurement caused by material buildup on the probe
No moving parts, no mechanical wear, and minimal maintenance
Stable output even with fluctuating material levels
Reduced maintenance frequency lowers lifecycle cost
Suitable for continuous operation in harsh industrial environments
This makes RF admittance technology a preferred choice for critical and difficult applications, not just an alternative option.
Liquid Level Switches Description
RF Admittance Level Switch Key Technology & Performance
Measurement Principle (RF Admittance Technology)
RF admittance level control measures the admittance of the medium using high-frequency radio waves. Unlike conventional capacitive technology, RF admittance uses a three-electrode system consisting of a measurement electrode, shield (guard) electrode, and ground electrode.
Why It Matters
The active guard electrode isolates the measurement signal from material adhesion
Changes in impedance, capacitive reactance, and inductive reactance are processed together
Stable measurement even when material coats the probe surface
Signal Stability & Reliability
Built-in signal processing compares real-time signals with reference values
Adjustable switching delay (0–30 s) filters out short-term fluctuations
Reliable relay output ensures accurate level detection
RF Admittance Level Switch Applications & Industry Solutions
Cement, Fly Ash & Building Materials
Ideal for silos handling cement, fly ash, and fine powders where material buildup and dust are common.
Chemical & Petrochemical Processing
Reliable level detection for powders, granules, and viscous materials with changing dielectric properties.
Food & Pharmaceutical Ingredients
Suitable for sticky or coating materials where hygiene and measurement stability are critical.
Power, Energy & Environmental Systems
Applied in ash handling, dust collection, and material storage systems requiring stable and low-maintenance operation.
OEM Equipment Integration
Widely used in reactors, hoppers, and packaged systems where false alarms must be avoided.
Liquid Level Switches Parameter
RF Admittance Level Switch Technical Specifications
| Parameter | Specification |
|---|---|
| Applicable Media | Powder, Particle, Liquid, Viscous materials |
| Probe Material | SS304, SS316L, etc. |
| Probe Pressure | Max 5.0 MPa |
| Sensitivity | 0.5 pF |
| Material Temperature | –184 to +350 ℃ |
| Ambient Temperature | –40 to +80 ℃ |
| Switching Delay | Adjustable, 0–30 s |
| Mounting Interface | 1″ NPT, 3/4″ NPT or custom flange |
| Electrical Interface | M20 × 1.5, 1/2″ NPT |
| Working Power | 220 VAC, 24 VDC |
| Alarm Type | Upper or lower limit (optional) |
| Output Signal | Relay output |
| Contact Form | SPDT (1 SPDT) |
| Contact Capacity | 220 VAC / 5 A |
| Power Consumption | ≤ 2.5 W |
| Protection Grade | IP65 |
| Explosion-Proof Rating | Exia II CT5 Ga, Exid II CT5 Gb |
Instrava OEM/ODM
Reliable Instruments. Solutions That Fit Your Application.
Instrava is focused on delivering reliable industrial solutions through carefully curated products, application-driven optimization, and flexible customization. We select proven instruments from trusted manufacturers to ensure consistent quality, optimize solutions based on real working conditions to solve practical challenges, and provide tailored configurations to meet specific application needs.
By combining selection expertise with application understanding, Instrava helps customers reduce risk, improve efficiency, and achieve dependable results in complex industrial environments.
Why choose an RF admittance level switch instead of a capacitive level switch?
RF admittance level switches use three-electrode technology with an active guard electrode, which compensates for material buildup on the probe. This prevents false switching caused by adhesion or coating—a common limitation of traditional capacitive level switches.
Can RF admittance level switches detect sticky or viscous materials reliably?
Yes. RF admittance technology is specifically designed for sticky, viscous, and coating materials. The circuit automatically corrects signal changes caused by material adhesion, ensuring stable and repeatable switching without frequent cleaning.
What types of materials can be detected?
RF admittance level switches can detect powders, granules, liquids, viscous media, and both conductive and non-conductive materials, making them suitable for diverse industrial processes.
How does the anti-adhesion function work in real applications?
The active shield electrode isolates the measurement signal from coating effects. Combined impedance, capacitive reactance, and inductive reactance are analyzed together, allowing the switch to ignore material buildup on the probe surface.
Is maintenance required for RF admittance level switches?
No regular maintenance is required. The non-mechanical design eliminates wear, and the anti-adhesion function prevents probe fouling from affecting performance.
Are RF admittance level switches suitable for hazardous areas?
Yes. Explosion-proof versions are available with certifications such as Exia II CT5 Ga and Exid II CT5 Gb, suitable for hazardous industrial environments.
Why Choose Instrava
Built on Consistency, Not Claims
Focused on Industrial Applications
We specialize in industrial analysis and detection, with a clear understanding of real-world operating environments and requirements.
Strict Product Selection Criteria
Every instrument is evaluated based on performance, stability, and application suitability—not just specifications or pricing.
Reliable Supply & Quality Consistency
We work with trusted manufacturers to ensure stable supply, consistent quality, and dependable delivery.
Practical, Experience-Based Support
Our recommendations are grounded in application understanding, helping customers avoid common issues and achieve reliable results.
Instrava is built to reduce uncertainty—so every decision you make is clearer, safer, and more reliable.
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