Plug-in thermostat with external temperature sensor – Precise temperature control for heating and cooling

This plug-in thermostat with an external sensor is the ideal solution for automatically controlling the temperature of electrical devices. With a 2-metre sensor cable and an adjustable temperature range of 5–30°C, you can precisely control heaters, cooling appliances, or fans based on the actual room temperature—simply, reliably, and energy-efficiently.

Unlike simple timers, this thermostat responds to the actual temperature at the measurement location. The external sensor can be positioned flexibly—ideal for terrariums, greenhouses, basements, frost protection, or anywhere precise temperature control is required.

When is this plug-in thermostat the right choice?

This thermostat is particularly the right solution when you want to control electrical devices based on temperature without carrying out complex installations. Simply plug it between the socket and the device, set the desired temperature—and you're done.

The external temperature sensor with a 2-metre cable allows the temperature to be measured exactly where it matters—not at the socket, but at the actual location of use. This ensures precise control and prevents overheating or underheating.

Technical features and benefits

The plug-in thermostat uses an analogue dial to set the temperature between 5 and 30°C. Operation is intuitive and requires no programming—ideal for anyone looking for a straightforward solution.

The external temperature sensor with a 2-metre cable can be positioned flexibly and measures the temperature precisely at the desired location. The thermostat automatically switches connected devices on or off as soon as the set temperature is exceeded or undershot.

With a switching capacity of 230 V, the device is suitable for most electric heaters, fans, cooling appliances, and other temperature-dependent applications in the home, hobby, or commercial sectors.

Applications

The plug-in thermostat with an external sensor is suitable for a wide range of applications:

• Terrariums and aquariums: Precise temperature control for reptiles, amphibians, and tropical fish
• Greenhouses: Automatic control of fan heaters or frost guards
• Basements: Frost protection by automatically switching on heaters
• Storage areas: Temperature control for sensitive goods and materials
• Garages and workshops: Demand-based heating without wasting energy
• Conservatories: Automatic heating control based on the outdoor temperature
• Cooling devices: Temperature-dependent control of fans and coolers
• Incubators: Maintaining a constant temperature for breeding projects

Heating and cooling—versatile use

The plug-in thermostat can be used for both heating and cooling applications:

Heating mode: The thermostat switches on the heater when the temperature falls below the set value and switches it off when the target temperature is reached. Ideal for frost protection, terrariums, or supplemental heating.

Cooling mode: The thermostat switches on fans or cooling devices when the temperature rises above the set value. Perfect for server rooms, storage rooms, or overheated rooms in summer.

Installation and commissioning

Installation couldn't be easier and requires no electrical expertise:

1. Plug the thermostat into the wall socket
2. Place the temperature sensor at the desired measurement point (2 m cable length)
3. Plug the electrical device (heater, fan, etc.) into the thermostat's socket
4. Set the desired temperature using the rotary dial
5. Done—the thermostat starts regulating automatically right away

No programming, no complicated menus—just set it and let it run. The analog operation makes the device particularly reliable and durable.

Your benefits at a glance

• External sensor: 2-meter cable for flexible placement at the measurement point
• Easy operation: Analog rotary dial without complicated programming
• Precise control: Temperature range of 5–30°C for versatile applications
• Plug & Play: Ready to use immediately without installation
• Energy-efficient: Automatic switching on and off prevents wasted energy
• Versatile: Suitable for heating and cooling devices
• Reliable: Robust analog technology without failure-prone electronics
• Compact: Space-saving design for any socket
• 230V switching capacity: Suitable for most household appliances

Technical specifications

Energy efficiency and cost savings

The automatic temperature control prevents the plug-in thermostat from unnecessarily keeping heating or cooling devices running continuously. The device switches on only when it is actually needed—saving energy and significantly reducing electricity costs.

Especially with supplementary heaters, frost guards, or terrarium heaters that often run uncontrolled, the purchase pays for itself through energy savings after a short time.

Comparison: With and without a thermostat

Frequently asked questions

Practical examples of use

Example 1 – Terrarium heating: You keep bearded dragons and need a constant floor temperature of 28°C. Connect your heating mat to the thermostat, place the sensor on the terrarium floor, and set the temperature to 28°C. The thermostat automatically maintains a constant temperature—day and night.

Example 2 – Greenhouse frost protection: Your greenhouse should remain frost-free. Set the thermostat to 5°C and connect a frost guard. As soon as the temperature falls below 5°C, the heating switches on automatically and prevents frost damage to your plants.

Example 3 – Basement dehumidification: Your basement is too damp and cool. Connect a fan heater and set the temperature to 18°C. The thermostat maintains a constant temperature and prevents moisture-related mold growth.

Example 4 – Server room cooling: Your small server room overheats in summer. Connect a fan and set the temperature to 25°C. As soon as the temperature rises, the fan switches on automatically and cools the room.

Safety instructions

Maintenance and care

The plug-in thermostat is maintenance-free and requires no special care. For a long service life, please observe the following:

• Keep the thermostat dry and protect it from moisture
• Do not bend or crush the sensor cable
• Remove dust deposits occasionally
• Check the socket contacts for dirt
• Check temperature accuracy regularly with a thermometer

Scope of delivery

• Plug-in thermostat
• External temperature sensor with 2 m cable
• Operating instructions

Why choose a plug-in thermostat with an external sensor?

Unlike thermostats with an integrated sensor, which only measure the temperature directly at the socket, the external sensor enables precise measurement at the actual point of use. This is particularly important when:

• The socket is far from the area to be heated/cooled
• The temperature needs to be measured in an enclosed area (terrarium, cabinet)
• The socket is mounted on a wall where the temperature is not representative
• Precise control is required for temperature-sensitive applications

With a 2-meter cable, you can reach practically any measurement point in your surroundings and achieve significantly better control results than with permanently installed sensors.

Alternative applications

In addition to the traditional areas of application, there are numerous creative ways to use it:

• Wine storage: Consistent temperature for optimal wine maturation
• Cheese ripening: Precise temperature control for home cheesemakers
• Mushroom cultivation: Optimal growing conditions through temperature control
• Seed germination: Consistent warmth for rapid germination
• Aquaponic systems: Temperature control for plants and fish
• Home brewing: Temperature control during fermentation
• Scale modeling: Consistent temperature during painting and drying
• Photo laboratory: Temperature control for developer baths

Advantages over permanently installed thermostats

Conclusion: A simple solution for precise temperature control

The plug-in thermostat with external sensor is the ideal solution for anyone who needs simple, reliable, and energy-efficient temperature control. No installation, no programming, no complications—just plug it in and set the desired temperature.

The external sensor with a 2-meter cable enables precise measurements exactly where they matter. The robust analog technology guarantees years of reliable operation without sensitive electronics or complicated software.

Whether for terrariums, greenhouses, frost protection, or climate control—this thermostat is your reliable partner for automatic temperature control in all situations.