Diameter DN | mm | 15 | 20 | 25 |
Turndown Ratio | Q3/Q1 | ≥80 | ||
Max Flow/Q4 | m³/h | 3.125 | 5 | 7.875 |
Norminal/Q3 | m³/h | 2.5 | 4 | 6.3 |
Transitional/Q2 | m³/h | 0.05 | 0.08 | 0.126 |
Min/Q1 | m³/h | 0.032 | 0.05 | 0.07 |
Pressure Loss Rating | △p | ≤63 | ||
Max. allowable Pressure | MPa | ≤1 | ||
Transmitting Power | dBm | ≤20 | ||
Sleep current | uA | ≤12 | ||
Working Hours | Years | ≥6 | ||
Communication Methods | \ | GPRS |
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 |