RF Admittance Level Switch
Reliable level detection for sticky, coating, and difficult materials in industrial processes
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Designed to eliminate false alarms caused by material adhesion
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Active guard technology for stable and accurate switching
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Suitable for powders, particles, liquids, and viscous materials
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Industrial-grade design for harsh and hazardous environments
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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:
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Eliminates false measurement caused by material buildup on the probe
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No moving parts, no mechanical wear, and minimal maintenance
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Stable output even with fluctuating material levels
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Reduced maintenance frequency lowers lifecycle cost
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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
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The active guard electrode isolates the measurement signal from material adhesion
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Changes in impedance, capacitive reactance, and inductive reactance are processed together
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Stable measurement even when material coats the probe surface
Signal Stability & Reliability
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Built-in signal processing compares real-time signals with reference values
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Adjustable switching delay (0–30 s) filters out short-term fluctuations
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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
Tailored Sourcing & Customization: Getting You the Exact Product You Need
As your trusted supplier and sourcing partner, we bridge the gap between your custom requirements and China’s vast manufacturing capabilities.
Finding the right product in a massive supply chain can be challenging. That is where we step in.
As a curated industrial supplier, our core value is simple: we stand in your shoes to help you procure the most optimal products. Whether you are an EPC contractor needing specialized technical compliance, an OEM equipment manufacturer looking for custom branding, or an industrial distributor/trader seeking competitive edge, we customize and tailor products to fit your exact procurement needs.
How We Customize to Fit Your Procurement Needs
For EPC Contractors & Engineers: We custom-configure instruments and devices to match your precise datasheets—tailoring process connections, exotic materials, signal protocols, and managing third-party calibration and testing so you get project-ready solutions.
For OEM Equipment Manufacturers: We provide comprehensive OEM/ODM customization, including custom housing, labeling, branding (private labeling), and tailored technical specifications to seamlessly integrate with your machinery.
For Industrial Distributors & Traders: We offer flexible customization in packaging, product ranges, and technical parameters, helping you differentiate your portfolio and win more local bids.
Why Partner with Us for Custom Sourcing?
One-Stop Engineering Alignment: You don’t have to deal with multiple factories. We translate your technical requirements into precise manufacturer blueprints.
Strict Quality & Compliance Safeguard: We oversee the entire customization and production process in China, ensuring the final customized product meets your local standards and certifications.
Our Ultimate Value: We don’t just sell what’s on the shelf. We find, customize, and deliver the most suitable and cost-effective product for your unique application.
Related Product Recommendations
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 Trust Instrava?
We select manufacturers from a neutral, impartial standpoint, always with your best interests in mind.
Our very existence depends on helping you source the products that are the perfect fit for your needs.
Based in China, we are able to conduct on-site inspections of production environments and product quality firsthand.
We help you avoid intermediaries posing as factories.
We facilitate smoother after-sales support, eliminating time zone issues and the delays often associated with dealing directly with factories.
Our multilingual team ensures effective communication.
For a trading startup, every interaction with a client is a precious opportunity—a sign that you are willing to place your trust in us and give us the chance to prove ourselves.
In the digital age, while information is easily accessible, misconceptions often cloud the trust between people.
Instrava relies entirely on trust; it is our core philosophy and the foundation of our existence in society. It is the fundamental basis for our long-term growth and our commitment to serving the community.
Please place your trust in us.
