Guard against condensation, drips, leaks, and flooding.  Protect against potential mold and damage.  The Smart4House® Water Leak Detector alerts you before a disaster happens.  Compact design and wired sensor probes allow for optimal positioning in difficult to reach areas.  Battery powered devices allow for maintenance free operation for up to 12 months.

High-Risk Areas for Monitoring:

  • Basements / Sump pumps
  • Bathrooms
  • Kitchens
  • Utility rooms

The product can be purchased on ebay.com or amazon.de

WLD-04, detector universal probe: Power 2 batteries LR6-size AA / USB micro 5VDC
Manufacturer:SPEL, a.s. Třídvorská 1402, 280 00 Kolín, Czech Republic
Dimensions:90x103x21mm (3.54x4.05x0.82 inch)
Sensor Weight:130g (0.30lbs) with two AA batteries.
Probe cable length:2 m (6.56 ft)
Power:2 AA batteries or micro USB 5VDC
Battery Life:Up to 12 months.
Network Requirements:WiFi 802.11 b/g/n 2.4 GHz
Sensor Range:Up 80m (260 ft) without obstructions.
Operating Temperature:Temperature: 0 - 40°C, 32 - 104°F
Application:For indoor use only. Minimal separation distance between persons and sensor must be 20 cm (7.87 inch).

Data obtained via websites during the operation of Smart4house® devices is protected in accordance with the DIRECTIVE OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL 95/46/EC of 24 October 1995 on the protection of individuals with regard to the processing of personal data and on the free movement of such data, and according to DIRECTIVE OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL No. 2006/24/EC of 15 March 2006 on the retention of data generated or processed in connection with the provision of publicly available electronic communications services or of public communications networks.

Protection of Personal Data

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What is the water leak detector designed for?

The water leak detector is designed to detect water (leaking water pipes, leaking washing machine, rain storm, basement flooding, sump pump etc.). The detector is not designed for security applications.


Which smartphones are compatible with the application?

The detector is compatible with iOS rev. 6.0 and higher. The detector is compatible with ANDROID rev. 5.0 and higher.


Which models of the water leak detector are available?

The detector is manufactured in one version:
a) S4H-WLD-0x detector with power supply from two alkaline LR6 AA size batteries (included), or from an external power source by USB micro 5VDC cable (not included)


Probe installation

Both pins of the probe must be above the monitored water level.  The probe may be securely mounted to a structure.  It is important the contacts remain above the monitored surface.


How many probes can be connected to a detector?

Two probes can be connected to one detector. One probe is included with purchase.  Additional probes may be purchased separately at www.smart4house.net


How is the second probe connected?

The first probe is connected to terminals 1 and 2. The second probe is connected to terminals 3 and 4. The polarity of wires is not important.  Activation of the second probe is required and is completed within the application following initialization of the device.


Detector placement

Detectors must be placed within WiFi range of the AP/router (Access Point).   Best placement is in a dry area with temperature ranges from 0-40°Celcius or 32 - 104°Farenhiet.  


What batteries may I use?

Two (2) AA alkaline or lithium batteries. They must be installed correctly.  Correct position and polarity is marked on the product label located on the removable cover.


How long can the detector operate on a set of batteries?

Up to 12 months.


Do I have to monitor battery life?

No. Battery charge is continuously transmitted to you via the app.  Should the battery voltage drop to below 20%, your detector will alert you. Do not leave discharged batteries in the device!


Is it possible to detect other liquid that is not water?

No. The detector is designed for the conductance of normal water not exceeding the range of 5mSm-1.


How do I check the signal to the AP is strong enough?

Your smart phone or tablet displays an icon showing signal strength. Simply place your smart phone towards the detector verify signal strength through the APP.


Do I need an activated SIM card to receive the information from the detector?

A SIM card is not required if connected to a WiFi network.  If no WiFi network is available, a SIM with an activated mobile data plan is required.  Transmissions use Apple’s Push Notification Service (APNS) and Google Cloud messaging service.


Is this service subject to fees?

No, these services are free of charge.


How does the detector initialization take place?

The installation and initialization procedure is illustrated in the operations manual, which is supplied with the detector.  Detailed procedures and videos are available at www.smart4house.net.


How long is the warranty?

90 days from the date of purchase.


Is the data transmission from the detector secured?

Yes.  Data transmitted from the detector is encrypted.


What environment can the detector operate in?

The detector is designed for indoor use in the temperature range between 0-40°C resp. 32-104°F, without water vapor or condensation.


Which iOS version is compatible?

The detector is compatible with iOS rev. 6.0 and higher.


How does the detector work?

The detector periodically measures the resistance between the electrodes on the probe.  If a change is detected, a message is immediately sent to your Smartphone and/or Tablet. In addition, a status message is sent every 4 hours.   The detector recognizes three probe states 1. Flooded 2. Not Flooded 3. Probe not connected.


What is the power supply source for the detector?

The detector with 2x LR6 / USB power supply is fitted with battery holders and a USB micro power supply connector. The detector can be powered only by batteries or through a USB connector, or it can be fitted with batteries and power from the USB connector. In this case, when the power supply from the USB connector is interrupted, the detector automatically switches to battery power. You can use an ordinary adapter for 110/230VAC with USB micro connector as power supply, if the current carrying capacity exceeds 300mA, or you can use a power source with a USB 2.0 connector and a cable fitted with a USB connector on one end, and USB micro connector on the other. In this case the current carrying capacity of the source must exceed 300mA.


Why is cloud technology used for Smart4house detectors and what is its significance?

The information sent from the sensors is transmitted to the cloud for processing and storage. Smart4house applications communicate with the cloud and allow users remote updates and access.  The cloud runs on secured and backed-up servers.


What is the sensitivity of the detector?

When the probe detects water an alert message is sent within 20 seconds.


Can I display the detector status on several Smart phones/Tablets?

It is possible. You need to install the Smart4house application for the appropriate operating system on the Smartphone. The instructions for activation iOS are in the manual for iOS par. 3.2a, 3.2b.

Document name Date Document version
Product manual WLD-04 13.03.2015
iOS Manual WLD-04 15.11.2016 1
Android Manual WLD-04 15.11.2016 1
CE Declaration of conformity 03.12.2013 0

Water leak universal probe S4H-WLDS-04

Was launched presale of new product S4H-TMC-00. Thermometer with extended range, new application and a separate cloud designed especially for applications with a need to record and evaluate the record
Our products family gets a completely new dimension. It was launched portal application IF-THEN,which allows you to create simple conditions and on its creat interaction between sensors and wifi-relay
New LED bulbs technology.
Smart4House® has a new family member. It is the temperature sensor.