ULTRASONIC DOMESTIC WATER METER
NWM UL-DW
INTRODUCTION
NWM UL-DW is the static ultrasonic water meters covered from Dn15 to Dn40 for domestic and commercial application, its robust design ensures reliable and long lasting precision and support full smart IoT solutions.
FEATURES
1 Non-moving parts
Non-moving parts permitting the most reliable and longer term life; lowest pressure loss;
2 High accuracy
High accuracy, unaffected by sand, suspended solids or air pockets;
3 Reverse flow detect
It can detect both forward and reverse flow
4 Long battery life
10 years battery life, longer endurance
5 Communication
AMR ready for wire or wireless communication
6 IP 68
IP 68 environment protection class
DIMENSION
| Size | Dn15 | Dn20 | Dn25 | Dn32 | Dn40 |
| L | 130/165 | 130/154/190 | 225/260 | 225/260 | 245/300 |
| L1 | 244/259 | 234/258/294 | 345/380 | 349/380 | 331/386 |
| D | G3/4B | G1B | G1-1/4B | G1-1/2B | G2B |
| d | R1/2 | R3/4 | R1 | R1-1/4 | R1-1/2 |
| H | 123 | 123 | 152 | 152 | 152 |
L1: the length of the water meter with connection
METROLOGY
| DN | mm | 15 | 20 | 25 | 32 | 40 |
| R | Q3/Q1 | 250 | 250 | 250 | 250 | 250 |
| Q4 | m3/h | 3.125 | 5 | 7.875 | 12.5 | 20 |
| Q3 | m3/h | 2.5 | 4 | 6.3 | 10 | 16 |
| Q2 | l/h | 16 | 25 | 40 | 64 | 102 |
| Q1 | l/h | 10 | 16 | 25 | 40 | 64 |
| Starting flow rate | l/h | <4 | <4 | <4 | <8 | <11 |
| Max. reading | m3 | 99 999.999 | ||||
| Min. reading | liter | 0.1 | ||||
| Min. reading (calibration) | liter | 0.0001 | ||||
(For different Q3 and R, please contact with NWM).
MAIN TECHNICAL DATA
| Max. pressure | MAP16 | Installation position | Any position |
| Max. temperature | T30 / T50 | Climate and EMC Class | (B/O)(E1,M1) |
| Display Interface | Instantaneous ow, Accumulate ow, Wireless signal Working status, Reverse ow detect… | ||
| Communication port | Optical (infrared ray), M-Bus, Pulse Raido Frequency, LoRa, NB-IoT... | ||
DIAL FACE DESIGN
DISPLAY MENU
INSTALLATION
Suggest to install the UL-DW water meter at U5 D3 (Straight pipe before the water meter at 5D, after the water meter at 3D); Water flow should be in the same direction with the arrow on water meter main case; if installed horizontally (or vertically), water meter surface should face right upwards (or right ahead), and it cannot have any de ection from water meter outlet axis; The installation location should be protected from sunlight, freezing, pollution and water drown for easy removing and cannot be installed near the inlet and outlet of the pump; Flush the pipe work thoroughly to clear all impurities before installing the water meter; The water meter and pipeline should be connected by pipefitting, sealing gaskets and connecting nuts (the connections).
MAX PERMISSION ERROR
From Q1 inclusive up to but excluding Q2 is ± 2% for T30 (From Q1 inclusive up to but excluding Q2 is ± 3% for T50); From Q2 inclusive up to and including Q4 is ± 5%;
PRESSURE LOSS
SYSTEM SCHEME
Factory Show
