Water metering systems
Remotely readable apartment-level water meters speed up water billing and make it easier for customers to monitor their consumption.Koka Oy offers three different remotely readable systems for apartment-level residential water metering.

Wireless water metering system for apartment-level water metering.
- HYDROLINK Online service
- Real-time consumption monitoring
- Automatic email reports
- Integrations with billing software
- Oma Hydrolink mobile apps for residents
- Readings can be checked directly from the meter
- Integration with building automation
Devices
W-450 central unit | LVI number: 4482 634 | |
HYDRODIGIT-TX cold water meter | DN15* | LVI number: 4418 028 |
HYDRODIGIT-TX hot water meter | DN15* | LVI number: 4438 036 |
*(DN20 also available)
Accessories
Central unit antenna accessory | LVI number: 4482 648 |
RPT wireless amplifier | LVI number: 4482 622 |
WAD-4 wireless home display | LVI number: 4482 624 |
AMB temperature and humidity sensor | LVI number: 4482 635 |
EM24 Electricity meter |
Technical specifications
HYDROLINK Wireless (PDF)

Fixed network water metering system for apartment-level water metering.
- HYDROLINK Online service
- Real-time consumption monitoring
- Automatic email reports
- Integrations with billing software
- Oma Hydrolink mobile apps for residents
- Readings can be checked directly from the meter
- Integration with building automation
Devices
M-64 (64 devices) central unit | LVI number: 4482 631 | |
M-128 (128 devices) central unit | LVI number: 4482 632 | |
M-250 (250 devices) central unit | LVI number: 4482 633 | |
T-1 Data transfer unit | LVI number: 4482 619 | |
GSD-RFM cold water meter | DN15* | LVI number: 4418 013 |
GSD-RFM hot water meter | DN15* | LVI number: 4438 013 |
*(DN20 also available)
Accessories
AD-X separate home display - water consumption, temperature, air humidity | LVI number: 4482 600 |
EM340 Electricity meter |
Technical specifications
HYDROLINK Line (PDF)