Finder 1T.01.0 – 1T Series Room thermostats

Why Choose the Finder 1T.01.0 Mechanical Room Thermostat?

The Finder 1T.01.0 is a reliable wall-mounted mechanical room thermostat designed for straightforward temperature control in residential, commercial and light industrial environments. Part of the Finder 1T Series, this traditional room thermostat combines a gas-filled temperature sensing element, an adjustable temperature setting and a robust changeover contact in a compact white enclosure.

Featuring an adjustable temperature range of +7 to +30 °C, the Finder 1T.01.0 allows occupants to select their preferred room temperature using a simple rotary control. Its 16 A, 250 V AC changeover contact provides a versatile switching interface for compatible heating and cooling control circuits.

Unlike digital or programmable thermostats, the Finder 1T.01.0 operates using a mechanical gas-bulb sensing system. This provides automatic temperature-responsive switching without the need for batteries, wireless connectivity or software configuration. An integrated system operating indicator light provides a useful visual indication of the controlled circuit's operation when wired appropriately.

With a white finish, surface-mounted construction, mechanical temperature-setting limitation and IP20 protection rating, the Finder 1T.01.0 is a practical choice for installers seeking a straightforward room thermostat for compatible heating, ventilation and temperature-control applications.

Key Advantages

• Adjustable temperature control from +7 to +30 °C for everyday room comfort.
• Mechanical gas-bulb sensor provides temperature-responsive operation without batteries.
• 16 A changeover contact for suitable electrical control loads.
• 250 V AC contact rating supports compatible mains-voltage switching applications.
• 1 CO / SPDT contact arrangement offers flexibility for heating or cooling control circuits.
• System operating indicator light provides visual feedback when correctly connected.
• Simple rotary temperature adjustment without complicated menus or programming.
• 0.4–0.8 °C temperature differential supports consistent temperature regulation.
• Mechanical thermostat lock allows the adjustable temperature range to be limited.
• No separate thermostat power supply is required for the mechanical sensing and switching function.
• Surface-mounted wall installation simplifies fitting in suitable indoor locations.
• Screw terminal connections for conventional electrical wiring.
• White enclosure suits a wide range of residential and commercial interiors.
• IP20 protection rating for suitable dry indoor environments.
• Suitable for new installations, maintenance and replacement of compatible mechanical room thermostats.

Key Features

• Finder 1T Series room thermostat.
• Model: 1T.01.0.
• Product type: Mechanical room thermostat.
• Colour: White.
• Temperature sensing element: Gas-filled bulb.
• Temperature setting range: +7 to +30 °C.
• Temperature differential: 0.4–0.8 °C.
• Specified temperature rate of change: 1 °C per 15 minutes.
• Contact configuration: One changeover contact (1 CO / SPDT).
• Contact rating: 16 A at 250 V AC.
• Manual rotary temperature setting.
• Integrated system operating indicator light.
• Mechanical temperature-setting limitation.
• No digital display or programmable schedule.
• No batteries required for the mechanical thermostat function.
• Surface-mounted wall installation.
• Screw terminal connections.
• Protection rating: IP20.
• Approximate front dimensions: 79.6 × 79.6 mm.
• EAN / GTIN: 8012823235585.

How the Mechanical Gas-Bulb Thermostat Works

The Finder 1T.01.0 uses a gas-filled sensing element to detect changes in the surrounding room temperature.

As the room temperature rises or falls, the gas-filled element responds to the temperature change and operates the thermostat's mechanical switching mechanism. The contact changes state according to the temperature selected using the front rotary control.

This arrangement provides automatic temperature regulation without a digital sensor, microprocessor or battery-powered control circuit.

For a typical heating application, the thermostat can be wired so that the heating control circuit is activated when the room temperature falls below the selected setting and deactivated when the required temperature is reached.

The changeover contact also makes the thermostat suitable for appropriately designed cooling control arrangements. The correct terminals must be selected according to the required switching behaviour and the manufacturer's wiring diagram.

Mechanical thermostats are particularly useful where users require uncomplicated operation and installers prefer a conventional temperature-responsive switching device.

The Finder 1T.01.0 is not a programmable thermostat and does not provide automatic daily schedules, smartphone connectivity or remote temperature monitoring.

Adjustable Temperature Range from +7 to +30 °C

The Finder 1T.01.0 offers a temperature setting range of +7 to +30 °C, covering a broad selection of indoor temperature-control requirements.

The front rotary control allows the user to choose the required temperature without navigating a digital interface.

For residential heating applications, the setting can be adjusted to suit the desired comfort level. In offices and other occupied buildings, the thermostat can be used to establish a suitable temperature setpoint for the controlled area.

The lower end of the adjustment range may also be useful for applications requiring a relatively low temperature setting. However, the device does not incorporate a separately specified automatic frost protection programme.

Because the thermostat measures temperature at its installed location, correct positioning is important. The sensor should not be installed where direct sunlight, draughts, radiators or other local heat sources could cause an unrepresentative temperature reading.

The actual room temperature will also depend on the heating or cooling system's capacity, response time and control arrangement.

0.4–0.8 °C Temperature Switching Differential

Finder specifies a temperature differential of 0.4–0.8 °C for the 1T.01.0 thermostat.

The temperature differential, also known as switching hysteresis, is the difference between the temperatures at which the thermostat changes its output state in opposite directions.

This differential helps prevent the contact from switching repeatedly when the room temperature fluctuates very close to the selected setpoint.

For example, when the thermostat controls a heating system, the contact does not necessarily switch on and off at exactly the same temperature. A small separation between the switching thresholds provides more stable operation.

The specified differential should not be confused with an overall room temperature accuracy rating. Actual control performance depends on sensor location, thermal conditions and the response of the connected equipment.

Finder also specifies a temperature rate of change of 1 °C per 15 minutes in the thermostat's technical characteristics.

16 A Changeover Contact for Flexible Heating and Cooling Control

The Finder 1T.01.0 contains one changeover contact rated at 16 A, 250 V AC.

A changeover contact, also described as a single-pole double-throw or SPDT contact, provides a common connection that switches between normally closed and normally open contact paths.

This arrangement allows the thermostat to be incorporated into different temperature-control circuits, provided the correct terminals and switching logic are used.

In a heating installation, the contact may be used to control a suitable heating load or the control input of a boiler, contactor or other heating control device.

For cooling applications, the alternative contact path can be used where the control system requires the opposite switching action.

The 16 A contact rating provides a useful capacity for suitable resistive loads. However, inductive equipment such as pumps, motors, compressors and contactor coils can impose different switching demands.

The actual load must be assessed against the manufacturer's applicable contact ratings. Where the connected equipment exceeds the thermostat's permissible switching capacity, an appropriately rated contactor or relay should be used.

It is also important to verify the electrical requirements of the controlled equipment. Some boiler and HVAC inputs require volt-free control contacts, while others operate at a specified voltage. The wiring must be compatible with both the thermostat and the controlled system.

Integrated System Operating Indicator Light

The Finder 1T.01.0 includes an integrated system operating indicator light on the front of the thermostat.

This indicator provides a simple visual reference for the controlled circuit's operating state when the thermostat has been wired in accordance with the relevant manufacturer diagram.

For example, the indicator can help an occupant identify when the thermostat is calling for heating in a suitable installation.

Although the mechanical temperature-sensing and switching function does not require a separate power supply, the indicator light has its own electrical connection requirements.

Finder's wiring diagram shows a 230 V AC arrangement for the operating indicator. Installers should therefore distinguish between the thermostat's mechanically operated contact and the supply requirements of the indicator circuit.

The indicator should not be assumed to operate automatically in every low-voltage or volt-free control arrangement.

Correct wiring is essential to prevent damage to the thermostat or connected equipment.

Mechanical Temperature Setting Limitation

The Finder 1T.01.0 includes a mechanical thermostat lock, allowing the adjustable temperature setting to be restricted according to the manufacturer's instructions.

This feature can be useful in offices, rented properties, shared facilities and other environments where the permissible temperature setting should remain within an established range.

Restricting the temperature adjustment can also help building operators maintain more consistent heating or cooling conditions.

The mechanical limitation is a physical setting feature rather than a digital password lock or electronic access-control system.

It does not provide scheduling, occupancy detection or automatic energy-saving programmes. Those functions require additional control equipment or a more advanced thermostat.

Surface-Mounted Wall Installation

The Finder 1T.01.0 is designed for surface-mounted installation on an interior wall.

Its compact white enclosure measures approximately 79.6 × 79.6 mm across the front, making it suitable for conventional room thermostat locations.

The device uses screw terminal connections for the electrical control circuit and indicator connections.

For reliable room temperature measurement, the thermostat should be mounted in a representative location, away from direct sunlight, strong draughts and local sources of heat or cold.

It should also be positioned where normal room air can circulate around the sensing element.

The thermostat has an IP20 protection rating, so it is intended for suitable dry indoor locations rather than exposed outdoor or wet environments.

All installation and maintenance work should be carried out by a competent electrician with the electrical supply safely isolated.

The contact terminals, indicator wiring and controlled equipment must be connected according to the current Finder wiring diagram and the requirements of the electrical installation.

Finder 1T.01.0, 1T.01.1 and 1T.01.2: Choosing the Right Version

The Finder 1T.01 mechanical thermostat family includes several versions intended for different control requirements.

• Finder 1T.01.0: Standard mechanical room thermostat with adjustable temperature control and system operating indicator light.
• Finder 1T.01.1: Mechanical room thermostat with an additional ON/OFF switch.
• Finder 1T.01.2: Mechanical room thermostat with a SUMMER/WINTER changeover switch.

All three versions belong to the same general thermostat family, but the additional switch functions affect how each model is operated and wired.

The Finder 1T.01.0 is the appropriate choice where straightforward temperature regulation is required without a separate front-mounted ON/OFF or seasonal mode selector.

When replacing an existing thermostat, installers should check the full manufacturer part number rather than relying only on the external appearance of the device.

Contact ratings, wiring arrangements and required control functions should also be verified before selecting a replacement.

Typical Applications

• Residential central heating temperature control.
• Conventional room heating systems.
• Compatible boiler thermostat circuits.
• Heating control panels and auxiliary switching circuits.
• Suitable electric heating applications within the contact rating.
• Office room temperature regulation.
• Commercial premises requiring simple manual temperature control.
• Suitable cooling control circuits.
• Fan-coil and HVAC control interfaces where electrically compatible.
• Utility rooms and ancillary spaces.
• Rental properties requiring uncomplicated thermostat operation.
• Replacement of compatible mechanical wall thermostats.
• Building maintenance and refurbishment projects.
• Electrical installations requiring a mechanically operated SPDT temperature switch.