Complaint
| Item | Unit | Details | ||
| Nominal diameter | mm | 15 | 20 | 25 |
| Q3/Q1 | R80/R100 | |||
| Overload flow(Q4) | m³/h | 3.125 | 5 | 7.875 |
| Nominal flow(Q3) | m³/h | 2.5 | 4 | 6.3 |
| Transitional flow(Q2) | m³/h | 0.05 | 0.08 | 0.13 |
| Minimum flow(Q1) | m³/h | 0.031 | 0.05 | 0.08 |
| Accuracy class | Class 2 | |||
| Maximum indication | m³ | 99999 | ||
| Temperature class | T30,T90 | |||
| Pressure class | MAP 10/MAP16 | |||
| Pressure loss class | ΔP63 | |||
| Flow profile sensitivity class | U10/D5 | |||
| environmental class | Class B | |||
| Electromagnetic environment class | E1 | |||
| Static current | uA | <10 | ||
| PREPAID | LORA | GPRS | NB-IOT | |
| Composition | Prepaid water meter IC card Card Reader Software | Lora water meter Concentrator Repeater Serve Platform | GPRS water meter Serve Platform | NB-IOT water meter NB-IOT transmission base station Serve Platform |
| Communication Band | None | 470-510Mhz 865-868Mhz | GSM850/EGSM900 | CDMA1X800E/EGSM900 |
| Advantage | Transmit information through IC card, charge accurately Install and operate easily | LAN transmission data, low power, Suitable for intensive installation real-time reading control | Wide area network, data transmission without distance limitation, simple installation and debugging, low sample order cost. | Wide coverage, low power consumption, low cost and slower rate. |
| Limitations | The stand-alone version of the software can only be read and controlled on a designated computer. Back up user data when replacing a pc. | Greater impacts by obstacles and limited communication distance(up to 1 km).On-site debugging is a heavy workload | Occasionally there will be data packet loss, high transmission rate, relatively high power consumption. | At present, NB technology is not fully mature and the coverage of base stations is low. |
| Battery capacity | more than 6 years | more than 6 years | more than 6 years | more than 6 years |
| Software payment | Free | Free | Free | Free |
| Cost | Almost no use cost | Electricity and flow charges for concentrators | Mobile data traffic charge of 2g data traffic in water meter | Mobile data traffic charge of 2g data traffic in water meter |
| necessary part of sample purchase | Prepaid water meter IC card Card Reader | Lora water meter Concentrator | GPRS water meter | NB-IOT water meter |
| Software | Stand-alone application | B/S Cloudy serve platform | B/S Cloudy serve platform | B/S Cloudy serve platform |
| Software compatible | YES | YES | YES | YES |
