Tube-11 Explosion-Proof Vibrating Rod Level Switch
The Tube-11 Explosion-Proof Vibrating Rod Level Switch offers an optimal solution for detecting solids and powders across diverse media and in explosion-proof applications.
The Tube-11 Explosion-Proof Vibrating Rod Level Switch offers an optimal solution for detecting solids and powders across diverse media and in explosion-proof applications.
Its innovative double-rod design addresses challenges commonly faced by tuning forks, such as blockages or bridging. The robust stainless steel probe extension enhances durability, enabling reliable performance even in aggressive environmental conditions.
The probe of Tube-11 Explosion-Proof Vibrating Rod Level Switch is designed with double vibration rods. The inner vibration rod nests with the outer vibration rod. When resonant frequency of inner and outer vibration rods is finely adjusted to the same value, both reliability and sensitivity of the Vibrating Rod Level Switch are at extremely high level. The innovative developed technology enables the sensor to detect fine-grained solids with density as low as 0.02 g/cm³. The piezoelectric devices are utilized for vibration drive and detection. When vibration frequency of the inner and the outer vibration rod is finely adjusted to the same value, it results in the resonance of both inner and outer vibration rods. Until the vibration rod comes into contact with application medium, resonant frequency of the outer vibration rod will change, therefore destroying the resonant condition. Vibration amplitude of the probe will substantially decrease. The output signal from piezoelectric detection device will also decrease accordingly. An integrated electronic circuit is designed to analyze the amount of decrease and output a switch signal.
● The Tube-11 Vibrating Rod Level Switch is the first made-in-China Vibrating Rod Level Switch featuring an innovative double-vibration-element design, delivering unparalleled performance and reliability.
● Enhanced Corrosion Resistance: Built with strong anti-corrosion materials, including 316L and 318 S13, for superior durability in aggressive environments.
● Certified Safety and Durability: Equipped with CE certifications for Gas/Dust Flameproof Enclosure (Ex d IIC T6～T1 Gb, Ex tD A21 IP66 T80～440℃) and Gas/Dust Intrinsic Safety (Ex ia IIC T6～T1 Ga, Ex iaD 20 T85～450℃), alongside IP66/IP67 ingress protection.
● Exceptional Sensitivity: Fine adjustment of resonant vibration frequency ensures high sensitivity, enabling detection of fine-grained solids with densities as low as 0.02 g/cm³, suitable for almost any granular bulk solid application.
● Wide Temperature Tolerance: Operates at application temperatures up to 400°C (752°F) with water/air cooling techniques, catering to high-temperature environments.
● Advanced Self-Diagnostics: Features a robust self-diagnostic function for accurate fault detection. The abrasion-resistant double-rods design ensures extended service life even in challenging conditions.
● Redundancy for Buildup Prevention: Offers larger redundancy to effectively avoid material buildup, making it highly reliable for viscous and adhesive materials.
● Maintenance-Free: Unaffected by changes in product properties, ensuring stable, maintenance-free operation.
● Ease of Use: Designed for effortless installation and operation, requiring no calibration.
| Applicable medium | Types of the medium | Granular or powdery solids ① |
| Density | ≥0.02g/cm³ | |
| Probe data | Vibration frequency | ~ 360Hz |
| Probe length | 125mm | |
| Probe diameter | 16mm | |
| Switching Delay | When immersed | 0.5s |
| When laid bare | 1s | |
| Power Supply | Relay | 20～253V AC/20～72V DC |
| Two-wire | 10～36V DC | |
| Max. Power consumption | 8VA(AC)； 1.5W(DC) | |
| Output | Relay | DPDT，5A/253V AC/24V DC |
| Two-wire | 8mA/16mA，Alarm <2.3mA | |
| Installation conditions | Process pressure | -1～16bar |
| Process temperature | Regular temperature: -50～150℃ High temperature: -50～250℃ Ultra-high temperature: -50～400℃ | |
| Ambient temperature | -40～80℃ | |
| Storage and transport temperature | -40～80℃ | |
| Cooling system data (for Ultra-high temperature only） | Air intake tube | 6×4 (Outer diameter 6mm) PU tube |
| Cooling air pressure | 0.8Mpa | |
| Min. cooling air flow rate | To be adjusted② | |
| Overvoltage protection | Relay | Category III, class I |
| Two-wire | Category III, class II | |
| Certificates and approvals | Ingress Protection | IP66/IP67 |
| Explosion-Proof | Flameproof Enclosure:：Ex d IIC T6～T1 Gb, Ex tD A21 IP66 T80～440℃ Intrinsic Safety：Ex ia IIC T6～T1 Ga, Ex iaD 20 T85～450℃ | |
| CE | LVD and EMC Certificates | |
| Materials | Housing | Aluminum alloy, stainless steel |
| Ground terminal | 316L | |
| Process connection | 316L | |
| Probe | 316L, 318 S13 | |
| Process seal | Klingersil C-4400 |
② Cover exhaust nozzle with whistle from instrument accessories and position the whistle such that whistle’s internal wall at its vent side is tightly attached to the external wall of exhaust nozzle, slowly increase the flow of cooling air until whistle blows up. This is when cooling air is at the expected minimum flow.
● Explosion-Hazard Applications: Primarily designed for use in areas with explosive hazards, such as chemical plants, to ensure safe and reliable measurement of particulate materials.
● Versatile Material Compatibility: Suitable for a broad range of dry and bulk powder materials, including extremely light and fluffy substances, making it adaptable to various industrial needs.
● Optimized for Specific Industries: Ideal for monitoring free-flowing powders and granules, frequently encountered in sectors like agriculture and cement production, delivering consistent and efficient performance.
