Two-state room controller T-4.1
Regular price:
DKK626.32
The promotion runs until 15 October 2026
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Description
TECH T-4.1 – Wired Two-State Room Thermostat
TECH T-4.1 is a wired two-state room thermostat designed to control a heating device. The thermostat is used to maintain the set room temperature by sending a signal to the heating device.
The device is equipped with a built-in room sensor, a temporarily backlit display and a battery power supply. The thermostat offers a weekly heating program, day/night program, manual program, Optimum Start function and heating/cooling function.
Main functions
- room temperature control +/- with an accuracy of 0.2°C
- hysteresis from 0.2 to 8°C
- weekly heating program
- day/night program
- manual program
- Optimum Start function
- heating/cooling function
- wired communication
Equipment
- temporarily backlit display
- built-in room sensor
- glass front panel
- 2 × AA 1.5V batteries
Precise temperature control
The TECH T-4.1 enables room temperature control with an accuracy of 0.2°C. The hysteresis of the set temperature can be adjusted from 0.2 to 8°C.
Weekly program
The thermostat features a weekly heating program, which allows the user to define the times when comfort or economy temperature should apply. The available programs allow settings for all days of the week, weekdays and weekends, as well as individual days.
Day/night and manual mode
The TECH T-4.1 offers a day/night program, in which comfort and economy temperatures can be set for the appropriate times of day. A manual mode is also available, allowing the set temperature to be changed directly using the “+” and “-” buttons.
Optimum Start function
The Optimum Start function monitors the performance of the heating or cooling system and enables heating or cooling to be started in advance, as required to reach the set temperature.
Heating/cooling function
The thermostat allows the selection of an operating mode suitable for a heating or cooling system.
Battery power supply
The TECH T-4.1 is powered by 2 × AA 1.5V batteries. The T-4.1 communicates with the heating device via a wired connection.
Technical specifications
| Specification | Value |
|---|---|
| Type | Wired two-state room thermostat |
| Power supply | 2 × AA 1.5V |
| Communication | Wired |
| Room temperature setting range | 5–35°C |
| Temperature control accuracy | 0.2°C |
| Measurement error | ±0.5°C |
| Hysteresis | 0.2–8°C |
| Room sensor | Built-in |
| Contact | Voltage-free |
| Nominal contact load | 230V AC / 0.5A (AC1) 24V DC / 0.5A (DC1) |
| Display | Temporary backlight |
| Front panel | Glass |
| Installation | Surface-mounted |
| Dimensions | 134 × 94 × 24 mm |
System expansion
The TECH T-4.1 can operate with the following main controllers:
- L-2
- L-5s – wired thermoelectric actuator controller
- L-10 – wired thermoelectric actuator controller
Is the TECH T-4.1 a wired thermostat?
Yes. The TECH T-4.1 is a wired two-state room thermostat and communicates with the heating device via a wired connection.

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