Uson-21 Ex Ultrasonic Level Transmitter
Uson-21 Ex Ultrasonic Level Transmitter is designed with a flameproof enclosure. It is certified for Flameproof Enclosure (Ex d II C T6 Gb) explosion protection by the China National Quality Supervision and Test Centre for Explosion Protected Electrical Products.
Uson-21 Ex Ultrasonic Level Transmitter is designed with a flameproof enclosure. It is certified for Flameproof Enclosure (Ex d II C T6 Gb) explosion protection by the China National Quality Supervision and Test Centre for Explosion Protected Electrical Products. Uson-21 is suitable not only for general working conditions, but also for explosion hazardous environment.
Uson-21 works on the same principle as Uson-11. The transducer sends out high frequency ultrasonic pulses. When a pulse hits liquid surface, it is reflected back. The reflected ultrasonic wave is received by the transducer and converted into an electronic signal. The time interval between transmitted ultrasonic pulse and received ultrasonic pulse is directly proportional to the distance between transducer and liquid surface. The relationship between sound wave travel distance S, travel speed C and time interval T can be expressed by a formula: S=C×T/2.
● Certified for high level of Flame-Proof Enclosure explosion protection: Ex d II C T6 Gb.
● With three selectable ranges (5m, 10m and 15m).
● With temperature compensation function, offers high accuracy and strong adaptability.
● RS-485 communication interface to reach real time monitoring, convenient and efficient.
● Special echo signal processing algorithm is used, can effectively avoid false echo waves.
● With IP66/IP67 Ingress Protection rating.
● Preventing strong corrosion with PVDF transducer.
● Convenient operation on language setting.
● With CE certificates. Contactless measurement ensures no wear during operation and virtually maintenance-free.
● EMC design of the product complies with IEC61000-4 (GB/T 17626.2) standard in EFT (LT: A), ESD (LT: A) and surge.
| Measurement range | 5m, 10m, 15m |
| Transducer | Standard: ABS |
| Anti-corrosion: PVDF | |
| Dead zone | ≤0.3m(5m/10m) |
| ≤0.6m(15m) | |
| Resolution | ±0.5% of the measurement range |
| Beam angle | 6°（5mRange） 8°（10mRange） 10°（15mRange） |
| Accuracy | ≤1% |
| Display | Chinese + English LCD Display |
| Buttons | Three |
| Rated input voltage | Four-wire：85～240V AC 50/60Hz 18～36V DC |
| Two-wire：18～30V DC | |
| Signal output | Two-wire：4～20mA |
| Four-wire：4～20mA | |
| Optional: RS-485/Relay | |
| Relay Contact rating | 4A 250V AC/30V DC |
| Ambient temperature | -20～60℃ |
| Process temperature | -20～80℃ |
| Process pressure | Normal |
| Cable entry | M20×1.5 |
| Housing | Aluminum alloy |
| Process connection | Thread connection |
| Flange connection | |
| Ingress Protection | IP66/IP67 |
| Explosion-Proof | Ex d IIC T6 Gb |
| CE | LVD and EMC Certificates |
● Ideal solution for open tanks/pools where the conditions contain explosive gas.
● For applications under corrosive environments where contain explosive gas as well, such as urban drainage pumping stations, sump pits/collecting wells, biochemical reaction pools and sedimentation tanks, etc.
