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● DN 15 to 32, dynamic range optional R 200/250/315/400
● IP 68 suitable for outdoor installations
● Integrated with multi-communication: NB-IoT , wM-Bus, LoRaWAN, GPS, STS, Infrared
● NB-IoT and wM-Bus/LoRaWAN dual communication design
● Battery lifetime up to 15 years
● U0 / D0, easy to install
| U550 ULTRASONIC WATER METER | |||
| Medium temperature range | °C | 0.1 ~ +50 | |
| Ambient operating temperature | °C | -5 ~ +55 | |
| Ambient humidity | RH | 0 ~ 100 （at temperture 40°C） | |
| Environmental class | O (Outdoors) | ||
| Meter body material | SS316L, Brass, Composite | ||
| Nominal pressure | MAP | bar | 16 |
| Power supply | 3.6V DC lithium batteries | ||
| Battery lifetime* | 15 years | ||
| Communication Module | NB-IoT, LoRaWAN, wM-Bus and other optional | ||
| Protection class | IP68 | ||
| * Depends on local signal strength, configured online frequency each day and the ambient temperature at the installation. | |||
| Nominal Diameter | DN | mm | 15 | 15 | 20 | 20 | 25 | 25 | 32 | 32 |
| Permanent flow rate | Q3 | m³/h | 2.5 | 2.5 | 4.0 | 4.0 | 6.3 | 6.3 | 10 | 10 |
| Minimum flow rate | Q1 | L/h | 6.25 | 10 | 10 | 16 | 15.75 | 25.2 | 25 | 40 |
| Dynamic (Q3/Q1) | R | 400 | 250 | 400 | 250 | 400 | 250 | 400 | 250 | |
| Overload flow rate | Q4 | m³/h | 3.125 | 3.125 | 5 | 5 | 7.875 | 7.875 | 12.5 | 12.5 |
| Transitional flow rate | Q2 | L/h | 10 | 16 | 16 | 26 | 25.20 | 40.32 | 40 | 64 |
| Starting flow rate | L/h | 2 | 2 | 3 | 3 | 5 | 5 | 8 | 8 | |
| Max. Pressure Loss | bar | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 |
| Nominal Diameter | DN | mm | 15 | 20 | 25 | 32 |
| Overall length | L1 | mm | 165 | 190 | 260 | 260 |
| Overall length with coupling | L2 | mm | 261 | 296 | 382 | 386 |
| Height | H1 | mm | 123 | 123 | 127 | 136 |
| Height | H2 | mm | 175 | 175 | 179 | 188 |
| Width | B | mm | 94.5 | 94.5 | 94.5 | 94.5 |
| Connection thread on meter | Inch | G ¾ | G 1 | G 1¼ | G 1½ | |
| Connection thread of coupling | Inch | R ½ | R ¾ | R 1 | R 1 ¼ |
