Tube-11 Explosion-Proof Vibrating Rod Level Switch
The Tube-11 Explosion-Proof Vibrating Rod Level Switch is the perfect solution for measuring the presence of solids and powders across a wide range of media and Explosion-Proof applications.
The Tube-11 Explosion-Proof Vibrating Rod Level Switch is the perfect solution for measuring the presence of solids and powders across a wide range of media and Explosion-Proof applications.
The double-rods design provides the solution to tuning forks which may become blocked or bridged. Stainless steel probe extension allows the vibration rod to work in a variety of 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.
● First made-in-China Vibrating Rod Level Switch that is designed with double vibration elements.
● With CE Certificates, 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℃.) Certificates, and IP66/IP67 Ingress Protection.
● High sensitivity thanks to the fine adjustment on the resonant vibration frequency; suitable for virtually all applications in granular bulk solids. The innovative developed technology enables the sensor to detect fine-grained solids with density as low as 0.02 g/cm³.
● Application temperature range: up to 400° C (752℉) with water/air cooling techniques.
● Strong self-diagnostic function to accurately locate the fault. Abrasion resistant and highly robust double-rods design.
● Larger redundancy to avoid buildup and highly reliable for strong viscosity and adhesiveness medium.
● Unaffected by changes of product properties (maintenance-free).
● Easy installation and no calibration.
● Strong anti-corrosion probe with 316L and 318 S13.
| 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.
● It is mainly used in the areas with explosive hazard (such as chemical plant) for the measurement of particles.
● Vibrating Rods are suitable for a wide variety of dry and bulk powder materials including extremely light, fluffy materials.
● Ideal in free flowing powders and granules, most commonly found in the agriculture and cement industries.
