| Items | Parameters |
| Nominal diameter | DN15-DN400 |
| Material quality | Nominal diameter < DN50: measuring tube: copper; Customizable stainless steel 304 or 316 Nominal diameter ≥ DN50: measuring tube: carbon steel (Stainless steel is used at the sensor); Customizable stainless steel 304 or 316 |
| Measurement range | Temperature range | Nominal diameter < DN50:4-90℃; Nominal diameter ≥ DN50:4-130℃ |
| Temperature difference range | 0-85K(thermometric starting temperature difference 0.2K) |
| Minimum pairing temperature error | ±0.1℃ |
| Maximum working pressure | 1.6MPa,2.5MPa optional |
| Accuracy grade | Grade 2 |
| Temperature sensor type | PT1000,DIN/IEC751B |
| Protection grade | IP68 |
| Working power supply | Powered by 3.6V lithium battery, each battery can work continuously for 6 years above. DC8-24V (Specify when ordering) AC220V，50HZ (Optional power adapter, specify when ordering) (110V also available) |
| Working environment | Environment class A/ class B/class C/class D |
| Power consumption | Standard state < 30uA. It can continuously work 20 years above mostly |
| Communication data | Optical interface | Baud rates 9600bps, 4800bps, 2400bps, 600bps, 300BPS are optional, 9600bps is the default; Adopt GB/T 26831 protocol. |
| RS485/M-BUS | Baud rates 9600bps, 4800bps, 2400bps, 600bps, 300BPS are optional, 9600bps is the default; Transmission distance≤150m GB/T26831 protocol, CJ/T 188 protocol and Modbus RTU protocol are optional, the communication protocol is automatically identified. |
| Wireless-communication | NB-lot narrow-band Internet of Things 4G network communication |
| Local display | Double-line display includes 9-digit cumulative quantity, 6-digit instantaneous flow, supply and return water temperature, temperature difference, cumulative effective running time. |
| Display resolution | Heat 0.1kw·h, cumulative flow 0.001m³ temperature 0.01℃； temperature difference 0.01K |
| Storage temperature | -25~55℃ |
| Data storage | Ferroelectric storage parameters usage. Store heat, accumulated flow and relative time on monthly basis, recording accumulated flow of 32moths ago and 31days ago automatically |
| Pressure loss level at common flow | Nominal diameter < DN50:△P40 Nominal diameter ≥ DN50:△P10 |
| Length of temperature sensor signal line | Nominal diameter < DN50:1.3m; Nominal diameter ≥ DN50:Standard configuration:5m (Other lengths need to be customized) |
| Installation position of Heat Meter | Water supply end(Specify when installing at the backwater end) |
