Room thermostat RT1B

Room thermostat RT1B



    Digital room thermostat RT1B is used to regulate room temperature in apartments, houses or for zone temperature control in large premises.

    • Room thermostat regulates the room temperature by controlling (ON/OFF) the energy source, circulation pump or the supply valve.
    • Thermostat can be used for radiator, fan coil or surface heating or cooling systems (*in case of low-temperature system, it is necessary to ensure regulation or limitation of supply temperature).


    • Intuitive and comfort control with smart device.
    • Powered by a battery that can be recharged via USB-C connector.
    • User functions PARTY, ECO, HOLIDAY and VENTILATION.
    • Measurement of humidity and air quality (option).




    Featured functions

    Setting with use of smart device and Bluetooth connection

    Room thermostat can also be set with the use of smart device and Clausius BT application. Application allows easy setting of desired temperature, user functions, time programs, parameter. It can also be used for status overview, software updated and many other settings. The application is available for smartphones with Android or iOS. The connection of the thermostat to the smart device is direct, via a Bluetooth connection (no internet needed).

    Room thermostat Seltron powered by a rechargeable battery

    Model RT1B is powered by rechargeable battery. When the battery is low on energy it can be recharged with any charger that has a USB-C port. This saves you time and cost with yearly changes of batteries and avoids potential damage to the thermostat due to spilled battery. The charging connector is located at the bottom of the thermostat.

    Room thermostat Seltron and function VENTILATION

    For the purpose of room ventilation room thermostats have a dedicated built-in function VENTILATION. When the function VENTILATION is activated, the thermostat does not take measured temperature into account for a certain time. In this way, we prevent overheating of the rooms due to rapidly lowering of room temperature. At the same time, that helps you save energy and decrease heating costs.

    Technical data

    Tehnični podatkiRT1B
    Power supply3,7 V
    Typical consumption< 0,1 W
    Rechargeable LiPo battery
    Wired connection
    Housing materialPC – thermoplastic
    Degree of protectionIP20 according to EN 60529
    Safety classIII
    Relay6(3) A, 230 V~
    Type of temperature sensorsMurata NTC (10 kOhm)
    Additional temperature sensor (AUX)Murata NTC (10 kOhm)
    Additional sensor
    Humidity sensorOption, 10 % ÷ 90 % Rh
    DisplaySegment LCD with backlit, black-white
    Efficiency class according to EN 60730-1Class 4 (2 %)
    Temperature setting rangeSetting range in heating: 4 ÷ 40 °C,
    Setting range in cooling: 4 ÷ 40 °C
    Operation modeHeating or cooling
    Humidity measuringOption
    Air quality measuringOption
    Time program CH1
    Time program CH2
    Working with ED factor
    Working with hysteresis
    Parameters settings
    Control with smart device
    Permissible ambient temperature0 ÷ 40 °C
    Storage temperature-20 °C … +65 °C
    Product weight~130 g
    Number of pieces in a package unit54 pieces
    DimensionsRoom thermostat Seltron RT1M WT1M dimensions

    Performance comparison

    Power supply and installation
    Battery powered
    Mains powered
    Wall installation
    Wall installation
    Technical characteristics
    Wireless thermostat
    Relay output
    Option of connecting an auxiliary sensor
    System control
    Systems with Radiators
    Systems with Fan coils
    *Surface H/C (floor, wall, ceiling)
    * It is necessary to ensure regulation or limitation of supply temperature.
    User functions
    PARTY function – activation of the comfort operation mode
    Function ECO – activation of saving temperature
    Function HOLIDAY – activation of saving temperature in absence
    Function VENTILATION – activation of saving temperature during ventilation
    Heating system protection
    Room frost protection
    Room overheating protection
    Protection against overheating of rooms


    Dear customers!

    Please be informed that our store Seltron d.o.o. will be closed on the following days 12-13 January 2024 for annual inventory purposes.

    Thank you for your understanding.


    The Seltron service will be closed from 27 December to 29 December 2023.

    Any emergencies or issues that arise during our absence will be dealt with as soon as the service reopens on 3 January 2024.

    Thank you for your understanding.