Digital room thermostat DT90A1008

Simple and Reliable Temperature Controller

The DT90A1008 digital room thermostat is designed for those who want precise temperature control without unnecessary complexity. There are no programs, no apps – just a clear display, intuitive buttons, and solid, proven regulation technology.

The current room temperature and the set value are displayed simultaneously – no need to switch modes to see what’s happening. The ▲ and ▼ buttons allow adjustments in 0.5°C increments, and their operation is protected against accidental presses: to change the temperature, you must intentionally exit the current temperature display mode.

ECO Function and Freeze Protection

The “Off/Standby” button acts as a “pause” – when held for 2 seconds, the thermostat turns off heating but does not leave the room unprotected. Freeze protection activates automatically at 5°C, though this threshold can be adjusted within the 5–16°C range, for example, if the home contains plants or water systems requiring a higher minimum temperature. In standby mode, the thermostat continues monitoring temperature – eliminating the risk of sudden drops.

TPI Regulation – Intelligent but Invisible

There are no “learning” or “home adaptation” options here – but there is a TPI (Time Proportional Integral) algorithm with fuzzy logic. It operates quietly and effectively: heating turns on for longer periods but less frequently, avoiding cyclic temperature swings and excessive energy consumption. This is not a marketing “smart” mode – it’s proven technology used in installations with gas boilers, oil boilers, and electric radiators.

Safe Installation and Long Service Life

The thermostat can be mounted on a wall or in a flush-mounted box. It is powered by two AA batteries (included), which last at least 2 years – up to 4 years with high-quality batteries. When voltage drops, a warning appears – you won’t be left unexpectedly without control. The relay has a resistive load capacity of 8 A (approximately 1.6 kW) and an inductive load capacity of 3 A – sufficient for direct control of a radiator or boiler without requiring an additional relay.

What Does This Mean in Practice?

• No need to search for instructions: everything is visible on the screen.
• No need to worry about freezing during trips: freeze protection activates automatically.
• No need to buy a new thermostat in 5 years: 5-year warranty from the date of manufacture.
• No need to break walls: installation with two wires (2-core), without additional power supply.
• No need to fear failures: if the sensor fails, the thermostat automatically switches to emergency mode – maintaining 10% load to avoid complete system shutdown.

Who Is It For?

For the installer – simple installation, clear electrical parameters, no configuration required beyond Installer Mode (if needed). For the user – no complicated settings, clear display, peace of mind during absences. For the system – stable regulation without temperature fluctuations.

This is not a “smart” thermostat. It is a well-made thermostat.