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BN35 socket thermostat
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BN35 radio thermostat with timer

The convenient solution for thermostat and time control of your electric heating or cooling units

A constant feel-good temperature – reliably regulated

Using the radio thermostat BN35 from Trotec as remote control, you can easily determine at which room temperature electric heaters or air conditioners shall be switched on or off. The convenient time control of electrical devices with integrated thermostat is also possible.

You can control the switch-on and -off of just one or several devices at a time. The (unobstructed) radio range amounts to approx. 20 metres. It allows you to simultaneously control up to 100 radio-controlled sockets (receivers) with just one radio thermostat (transmitter) – always provided that they are situated within reach. With the timer function you can ensure an agreeable air temperature in a room before even entering it – ideal for the cold kitchen in the early morning, for bathrooms, guest toilets, basement hobby rooms, conservatories, office spaces etc.

Here's how it works:
The BN35 set comprises a radio-controlled socket and a radio thermostat. Simply plug the radio-controlled socket in between a wall outlet and your electrical device. Now you can use the radio thermostat as remote control to set the desired switch-on or switch-off temperature. The radio thermostat measures the room temperature at the current location and accordingly switches the heater or air conditioner on or off to reach the desired target temperature value.  Upon reaching the predefined room temperature, the radio thermostat switches the connected electrical appliance off until another cooling or heating cycle is required.

Furthermore, you can make use of a separate or combined time control so as to specify temperature-dependent switch-on/off times in advance. An energy-saving and budget-friendly solution! The BN35 offers you endless possibilities.

The BN35 – all functions and characteristics at one glance:

Using the radio thermostat in heating or cooling mode you can specify the desired target temperature ranging between 0 °C and 70 °C in fine increments of 1 °C (or Fahrenheit). Of course, in order to actually reach the desired room temperature, the connected heating or cooling unit must have a sufficient performance capacity. A scheduled, time-controlled switch-on and switch-off of the connected devices can also be accomplished. 

Suitable for a wide variety of heating and cooling units
The BN35 is ideally suited for the majority of eating and cooling units on the market. These include infrared radiant heaters, heating panels, fan heaters, PTC ceramic heaters, convectors, oil-filled radiators, air conditioners, air coolers, fans or even electric towel dryers in the bathroom. The customary maximum load of up to 3,680 watts is fully supported by the BN35.

Range of up to 20 m 
The radio thermostat is your remote control. Even radio-controlled sockets located at a greater distance can easily be controlled from your present position. The range amounts to max. 20 metres, however, there should be no obstacles which could weaken or interrupt the radio signal.

1 radio thermostat for up to 100 radio-controlled sockets
Up to 100 radio-controlled sockets can be controlled wirelessly with just one radio thermostat. All radio-controlled sockets situated within the 20 m range will be tripped simultaneously by the radio thermostat. Hence, the set is ideally suited for use in greenhouses or halls. The corresponding radio-controlled sockets of type BN35R can be obtained from Trotec as separate accessories.

Note: Connected consumers are switched to zero potential when the device is switched OFF and must be provided with an automatic restart function.

Thermostat mode and timer can be combined 
Both thermostat mode and timer can be used separately or cleverly combined. By way of example, you can set a heater to be running on Monday between 3 and 5 p.m. and heat a room to 25 °C. At the scheduled time, the radio thermostat will measure the room temperature using its integrated sensor and then switch on the electric heater via the radio-controlled socket to heat the room. But, if the air temperature already corresponds to the desired value, the heater will only start up when falling below the preset 25 °C. An energy-efficient solution – for the device only heats as and when required. Be it at specified times or in continuous operation – with the BN35 you are always in control of when and at which temperature you want to start heating or cooling.

Switched off for the night and back on in the morning
Devices already equipped with an integrated thermostat can use the BN35's timer function. There is no need for heating or cooling devices to be running all night while you're sleeping. To keep from consuming any unnecessary energy you can set the timer in a way that the connected device will be switched off at 10 p.m. and back on at 7 o'clock the next morning.

6 options for timer programming 
The radio thermostat allows you to preset up to 6 different automatic timer programmes per day. For each individual programme, you can select on what day and at what time the timer will be activated and deactivated automatically. There are 4 options for selecting the days: You can either select one single day of the week (Mon, Tue, Wed, Thu, Fri, Sat, Sun), only working days (Mon – Fri), only the weekend (Sat – Sun), or the entire week (Mon – Sun).

Site recommendation 
The radio thermostat always measures the current room temperature of its surroundings. To make sure the sensor can detect the temperature correctly, it is important to be mindful of where the radio thermostat is positioned. On a window sill, for example, exposed to direct sunlight it will generally be warmer than in the centre of the room. A fireplace or radiator should not be in the immediate vicinity either. Therefore, it is advisable to perform the temperature measurement of a radio thermostat from a position promising a realistic measured value.

Everything under control
Used as mobile version, quickly at hand wherever you go, or for stationary application mounted to the wall: the backlit LCD display of the radio thermostat indicates the current time and room temperature, battery status (2 AA batteries) and – depending on the mode – all relevant setting options, time periods, target temperatures etc. As a result you will always be able to keep track of the set parameters.

Frost protection function
Should the ambient temperature of the radio thermostat drop to 3 °C or below, a frost protection mode, which ensures that the room temperature is increased to 5–7 °C by the heater connected to the radio-controlled socket, is activated automatically. In this manner, e.g. water pipes in unheated rooms are protected against icing up.

Can also be controlled manually 
You can also switch your connected heating or cooling unit on or off by pressing a button directly at the radio-controlled socket. However, this rules out the operation with thermostat function.

Saving energy by means of a permanent consumer switch-off function (OFF) 
To make sure that an electrical device really is turned off and no longer consumes power (no stand-by operation), the power supply can be reliably interrupted owing to the 2-pin circuit breaker.

Automatic switch-over from daylight saving to standard time and vice versa 
Using the DST option, the radio thermostat will automatically switch over from daylight saving to standard time and vice versa. Which means that you need not think about anything with regard to the time change twice a year, your preset time intervals will be adjusted automatically. For it is by no means certain whether we will really say goodbye to daylight saving in all of Europe by 2021.

BN35 radio thermostat

The BN35 impresses with high quality and safety standards

The set of radio thermostat and radio-controlled socket consists of safe components of high quality. What the BN35 offers:

  • Safety: 230 V AC / 16 A, 24/7 max. 3,680 W (also in continuous operation)
  • Line protection: additional internal overload protection
  • 2-pin circuit breaker: Connected terminal devices are de-energized.
  • Tested quality: The radio-controlled socket is certified according to DIN VDE 0620-1.

Technical details of the BN35

Using the BN35 radio thermostat will increase your user comfort when controlling electric heaters, fans or air conditioning systems. From your present position you can easily set the temperature value at which an electric heating or cooling unit shall be switched on or off via the BN35 remote control. With a combined or separate thermostat control and timer, 6 programming options, frost protection function and further features, the BN35 provides you with manifold opportunities.
BN35 – comprehensive functional range
The radio-controlled socket is simply plugged in between wall outlet and electric terminal device. With its integrated sensor the radio thermostat determines the respective room temperature at the current location. Depending on whether the current room temperature corresponds to the desired target temperature, the connected heater or cooling unit will be switched on or off via a signal to the radio-controlled socket.
BN35 – just plug it in
Up to 100 radio-controlled sockets can be connected to the BN35 radio thermostat. In open spaces the range of the radio thermostat amounts up to 20 metres. This allows you to simultaneously activate or deactivate several heating or cooling devices in large rooms, halls or greenhouses. Since the radio thermostat always trips all the radio-controlled sockets within range, you should ensure that only the devices you intended are switched on or off.
BN35 – for up to 100 radio-controlled sockets
The set "BN35 radio thermostat with timer" consists of a radio thermostat (transmitter) and a radio-controlled socket (receiver). With the radio thermostat you can control up to 99 additional radio-controlled sockets. Trotec offers the ideally suited radio-controlled socket referred to as BN35R.
BN35 – accessories BN35R
Depending on the currently active mode, the neatly arranged, backlit LCD display indicates the following parameters: current ambient temperature in °C or °F, desired target temperature, weekdays, cooling / heating mode, timer, time of day, start / end time, DST (daylight saving time), operation ON / OFF, connection status and battery status of the radio transmitter.
BN35 – LCD display
Modern, attractive design with handy curves and compact dimensions – the BN35 set in classic white blends in perfectly with any office or living environment. The dark display adds a very appealing visual highlight. Placed on the desk or sofa, the radio thermostat makes for a stylish eyecatcher in your home.
BN35 – dimensions
For stationary application or use at varying locations – the choice is yours. The radio thermostat always measures the current room temperature of its whereabouts. With the integrated eyelet on the rear of the device it can easily be attached to a wall in no time at all.
BN35 – portable or stationary
2 AA batteries (LR6/HR6) are required for the power supply of the radio thermostat. The radio-controlled socket does not need any batteries. To keep the energy consumption of the radio thermostat to a minimum, the display is automatically deactivated shortly after settings have been made. Excepting the extremely rare battery change the BN35 set guarantees maintenance-free operation.
BN35 – batteries
Technical data by comparison

All room thermostats in direct comparison:

To find the room thermostat which exactly meets your requirements, please consult the concise overview of all room thermostats from Trotec, which we're providing to you here so that you can compare them directly to each other.

Models which you do not wish to include in your comparison can be easily dismissed with only one click.

Technical data by comparison

A few practical benefits:

  • Suitable for manual and automatic heating and cooling control
  • Extensive programming options via timer: 7 week programs, 6 changes per day 
  • Individual programming depending on the day: Mon – Fri, Sat – Sun, Mon – Sun
  • Timer function, thermostat function and a combination of timer and thermostat function
  • The timer function is also a useful addition for electric heating or cooling units already fitted with integrated thermostat
  • Simple and flexible installation
  • Suitable for simultaneous switching up to 100 radio-controlled sockets
  • Simple switch-over from daylight saving to standard time 
  • Operating range from 0 °C to 70 °C
  • Temperature control in steps of 1.0 °C 
  • Automatic frost protection system (5 °C)
  • Permanent consumer switch-off function (OFF) 
  • Large range of up to 20 metres 
  • Indication of room temperature and time
  • Backlit display
  • Battery status indication 
  • For mobile application or wall mounting
  • Separate radio-controlled sockets BN35R are optionally also available as accessories

 standard equipment

 optionally available

 not available


Wireless Thermostat with Timer Switch BN35 show in Trotec online shop

Wireless Thermostat with Timer Switch BN35

You save: 20 %

43.95 £ 34.95 £ incl. VAT Show net price (VAT not included)


Technical data

Technical data
General information
  Article number
Control range
  Control range 0 °C up to 70 °C /32 °F up to 158 °F
  Accuracy ±1 °C
  Measuring interval [s] 20
Switching capacity
  Resistive load 16 A / 250 VA
  Inductive load 3.4 A / 250 VA
  CEE 7/3 (Schuko socket type F)
Device control
  Push buttons
  Remote control
Housing design
  Protection class II
  CAT II (2,500 V)
Power supply
  2 x 1.5 V, AA
Mains connection
  Mains connection 230 V, 50 Hz
  Connection plug CEE 7/3 (Schuko socket type F)
Ambient conditions
  Operation - min. temperature [°C] 0
  Operation - max. temperature [°C] 70
  Length (packaging excluded) [mm] 73
  Width (packaging excluded) [mm] 66
  Height (packaging excluded) [mm] 112
  (packaging excluded) [kg] 0.105
Standard scope of delivery
Standard scope of delivery
  Control unit
  radio-controlled socket
  Operating manual
Ascertainable measured values and functions
Internal sensors
  Air temperature [°C]
  Air temperature [°F]
Functions and features
  Temperature control for heating or cooling operation
  Indication of the current room temperature
  Target temperature indication
  Programmable timer switch
  Backlit LC display
  Automatic frost protection system
  Simple switch-over from daylight saving to standard time
  LED indicator button
  Memory function
  Can be remote-controlled
  Battery status indication

 standard equipment

 optionally available

 not available



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