Product Description
The Extension Module Kit allows you to extend the sensor cable of the Water Level Gateway up to 50 meters using a standard UTP cable (Cat5e or Cat6). These modules ensure signal amplification and reliable communication between the sensor and the gateway.
Directly extending the cable without these modules is not possible, as I²C signals become unreliable after just a few meters. Thanks to the built-in electronics, the signal is actively boosted and stabilized, so your sensors remain accurate even at longer distances.
The kit consists of two modules:
Module A: connected to the gateway with the included 50 cm RJ12 cable (RJ12 to RJ12 connectors)
Module B: connected to the sensor
Between these two modules, you simply use your own UTP cable.
Benefits
Extend your Water Level Gateway sensor cable up to 50 meters
No signal loss thanks to built-in amplifiers
Use your own UTP cable (Cat5e, Cat6)
Transparent – no extra configuration required
Also suitable for other I²C sensors and DIY projects
Technical Details
Supported cables: UTP Cat5e / Cat6
Maximum length: 50 meters
Protocol: I²C (optimized for the Water Level Gateway sensor)
Compatibility: Water Level Gateway, other I²C sensors (DIY/hobby)
Power supply: provided by the gateway, no external power required
Modules: 2 pieces (gateway side + sensor side)
What’s Included
When purchasing the optional Extension Module Kit, you receive:
Master module
Slave module
50 cm RJ12 cable – for connection to the gateway
User manual – with clear installation and usage instructions
Everything you need to get started right away – completely plug & play!
Frequently Asked Questions (FAQ)
1. Can I extend the sensor cable without this extension module kit?
No, direct extension via UTP does not work. The signal becomes unstable, leading to unreliable readings.
2. How many meters can I extend the cable with this kit?
Up to 50 meters using a standard UTP cable.
3. Is a UTP cable included?
No, you can use your own network cable. This gives you flexibility in length.
4. Does this kit also work with other gateways or sensors?
Yes, these modules are compatible with other I²C sensors, making them useful for hobby and DIY projects.
5. Do I need to change anything in Home Assistant?
No, the extension module works completely transparently. Just connect everything and it works immediately.












