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Scope of delivery
The SHT 5090 water sensor is the perfect solution for anyone who doesn't want to drill into tiles but still needs reliable, comprehensive monitoring for water leaks.
Whether under radiators, washing machines, sinks or shower trays : With its own weight of around 100 grams, the sensor remains securely on the floor - without any fixing or holder .
Thanks to its compact design and three ball electrodes, the SHT 5090 always establishes secure ground contact – even if you lean it vertically against a wall (e.g. behind a cupboard).
Two balls always touch the ground – and your water detector immediately triggers an alarm in the event of a leak .
The sensor is simply placed on the floor – that's it . No further installation is required.
It is particularly suitable for:
rental apartments
sensitive floors (tiles, designer flooring)
hard-to-reach places (e.g. under furniture or in hollow spaces)
🔌 Connection to the following water detectors required (please order separately)
SHT 5000 or SHT 5001 from Elektrotechnik Schabus.
Cabling via thin, unshielded LiYY control cable (2 × 0.14 mm²) – max. 50 m cable length per scanner.
📏 Cable extension up to 50 meters possible
The factory-installed cable length can be extended up to 50 m . The recommended cross-section is 2 × 0.14 mm² .
⚠️ Notes on cable routing and area of application
The LIYY cables used are only temporarily waterproof and, according to the manufacturer , are flame-retardant, low-adhesion, and self-extinguishing . They are resistant to oils, greases, coolants, and lubricants , but are not suitable for permanent water contact.
⚠️ Safety note: The LIYY cables must never be laid parallel to 230 V mains cables to avoid interference and safety risks.

Circuit diagram with freewheeling diode
When using third-party power supplies , it is necessary to connect a freewheeling diode (e.g. 1N4148) in parallel to the relay or contactor.
The function of the freewheeling diode is to suppress voltage spikes that occur when the relay is turned off. This minimizes current flow and voltage, thus protecting the sensitive reed contacts.
WEEE NO.: DE91394868
| Betriebstemperatur | -5°C / +50°C non-condensing humidity |
| Abmessungen (H×B×T) | |
| Anschlussleitung | ∅ 3.2 mm, 2 x 0.14 mm², 2.5 m, LIYY cable, special length on request |
Keine No-Name-Ware: Unsere Geräte sind geprüft, zugelassen und werden vom Fachhandwerk anerkannt.
Empfänger, Sender, Magnet, Batterie & Montagematerial – alles dabei, nichts nachzukaufen.
Reparatur und Ersatzteile direkt vom Hersteller – auch über die gesetzliche Gewährleistung hinaus.
Wir entwickeln und fertigen zuverlässige Mess- und Meldesysteme selbst – vom ersten Prototyp bis zum Reparaturservice, alles aus einer Hand. Unsere Produkte schützen Leben und schaffen Vertrauen.

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