问一下OLDBLACK,你是带压安装还是不带压安装？

给点英文资料，你看看注意事项

需要提醒的有以下几点
1. Find out the pipe diameter, DN

2. Find out max/min of the water flow – or other media

3. Is the media high /low viscose ?

4. Pipe material (weldable / non weldable )

5. Empty pipe or hot tap installation, tapping band?

6. Use the formula to find the accuracy: 0,25/ Vactual

7. Chose type of electronic

8. Chose cable length