Ring-21 Compact Liquid Level Switch
Designed with a lightweight compact structure with the fork body 38mm long, total length is 160.5mm and maximum diameter 31.5mm, Ring-21 is an ideal choice for small vessels within confined spaces.
Ring-21 is an economical compact tuning fork liquid level switch with maximum reliability and safety. It is also based on the principle that vibrating frequency changes when the fork detects the presence of a liquid. Designed with a lightweight compact structure with the fork body 38mm long, total length is 160.5mm and maximum diameter 31.5mm, Ring-21 is an ideal choice for small vessels within confined spaces. The detectable density is as low as 0.7g/cm³.
Same as Ring-11, Ring-21 Compact Liquid Level Switch is based on fork resonant principle. When fork tines which vibrates in harmonic resonance immerses into fluids, vibrating frequency of the fork will greatly decrease, so does the output of piezoelectric detection device. An integrated circuit is designed to analyze signal from piezoelectric device and output a switching signal.
● Compact and portable, with overall length 160.5mm, maximum diameter 31.5mm and the fork body only 38mm long.
● Precise and reliable function due to product-independent switching point.
● Particularly suitable for pipelines and other applications in confined spaces.
● With CE certificates. Economical, simple, high-performance, low-cost, and long-lasting.
● Highly reliable because of detecting changed of vibrating frequency of the fork.
● Small level switch version with stainless steel housing
● Simple setup, no calibration is required.
| Applicable liquids | Density | ＞ 0.7g/cm3 |
| Flow Velocity | Max. 6m/s | |
| Fork data | Vibrating frequency | ~1200Hz |
| Fork length | 38mm | |
| Accuracy | Measurement error | ±1mm |
| Delay | 3.0±0.5mm | |
| Repeatability | 0.5mm | |
| Switching delay | When immersed | 0.5s |
| When laid bare | 1s | |
| Power supply | Relay | 85～253V AC |
| 10～35V DC | ||
| Transistor NPN/PNP | 10～35VDC | |
| Power consumption | AC<3.8mA；DC<825mW | |
| Installation conditions | Process pressure | -1～40bar |
| Process temperature | -50～150℃ | |
| Ambient temperature | -40～70℃ | |
| Storage and transport temperature | -40～80℃ | |
| Overvoltage protection | Relay | Category III, class I |
| Transistor NPN/PNP | Category III, class II | |
| Certificates and approvals | Ingress Protection | Valve connector：IP65 |
| M12×1：IP66/IP67 | ||
| CE | LVD and EMC Certificates | |
| Materials | Housing | 316L |
| Process connection | 316L | |
| Process seal | Klingersil C-4400 |
● Confined space applications that expecting low cost, in non-explosive environments.
● Pipelines in pump protection system.
● Level measurement and control with process temperature within 150 ℃ (302℉).
