Fork-11 Ultra-high Temperature Tuning Fork Level Switch
Fork-11 Ultra-high Temperature Tuning Fork Level Switch. It is featured with the function of water cooling (air cooling) and is able to work reliably under ultra-high temperature conditions that up to 400℃.
Fork-11 Ultra-high Temperature Tuning Fork Level Switch is featured with the function of water cooling (air cooling) and is able to work reliably under ultra-high temperature conditions that up to 400℃ (482°F).
Fork-11 Ultra-high Temperature Tuning Fork Level Switch works in the same principle as Fork-11 series. The difference is an innovative cooling sleeve pipe is equipped. One end of the cooling sleeve pipe is welded to the process connection (flange) with air/water intake and vent, another end is connected with the vibrating probe. The air or water flow enters the inside of the vibrating probe through the capillary copper tube to take heat away, to cool the piezoelectric ceramic and wires to the allowable working temperature. This design makes the Fork-11 Ultra-high Temperature Tuning Fork Level Switch can operate reliably at a temperature up to 400℃ (482°F), and significantly expands its application field.
● High temperature resistant design, process temperature up to 400 ℃ (482°F).
● Reasonable design of tines and precisely adjusted of fork resonant frequency. The lowest measurable density can be as low as 0.008g/cm³.
● Particularly suits for level measurement of powdery, fine-grained bulk solids, can effectively avoid material buildup.
● Strong self-diagnostic function helps to accurately locate the fault.
● Simple installation and maintenance free.
● With CE certificates, gas and dust Flameproof Enclosure and Intrinsic Safety certificates.
● Made of strong corrosion resistant material 316L.
| Applicable medium | Types of the Medium | powders or granular solids |
| Density | ≥0.008 g/cm³ | |
| Medium size | Max. 10mm | |
| Probe data | Vibration frequency | ～140Hz |
| Fork length | 150mm | |
| 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 | -1～25bar |
| Process temperature | Regular temperature r: -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 adjusted | |
| 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 | |
| Intrinsic Safety: Ex ia IIC T6～T1 Ga | ||
| CE | LVD and EMC Certificates | |
| Materials | Housing | Aluminum alloy, , stainless steel |
| Ground terminal | 316L | |
| Process fitting | 316L, 316L coated PTFE | |
| Fork | 316L, 316L coated PTFE | |
| Process seal | Klingersil C-4400 |
● Level measurement of powdery, fine-grained bulk solids and (ultra-low density) particles with process temperature within 400 ℃ (482°F).
