Thermostats bring all the benefits of electronics to ON-OFF control of an apparatus. For example, devices allow for the storage of heating periods, both daily and weekly, and its set point. They may also be operate a boiler that an air conditioner (zone control thermostat). The temperature adjustment can be performed in an even more refined simple switching of ON-OFF, or in a linear fashion, as in case of temperature compensation will oscillators (TCXO).
Device has long been comprised of a bimetallic system which opens a circuit when the heat reached a certain stage and closed the circuit as soon as we descended below this temperature. In practice, it was as if there had been in fact two temperature setpoints neighboring thermal system with itself a certain inertia (similar to hysteresis in field of magnetism).
The low voltage devices have long used a mercury switch associated with a coiled bimetal element for switching. This mechanism, without using a switch contact closure, offers exceptional durability. Several of these devices whose range of Honeywell T8x were popular for decades.
Today we use more electronic devices that have a reliability of more comparable to Mercury models, more accurate, and pose fewer environmental problems in later life. Most of time, the electronic models detect variations in temperature using a thermistor, that is to say a resistance which varies with temperature.
A recent development is the electronic device with built-in clock. This allows the time-dependent temperature control in room, by which one can not forget to faucet at a lower temperature when it does not have to be in room. These can therefore save money. A thermostat is device designed to maintain a constant temperature for a given system through automatic adjustment.
Clock device - is equipped with a timer and / or another form of detection to observe that the occupant has left the room and bring the room after a set period of time at a lower temperature. The energy savings can be 20% or even 50% when used in recreational where the occupation and the heating behavior is very variable.
This results in an energy saving in that it cannot happen that the boiler remains lit days in a row. The comfort is increased because there heating is available at preset times, one need no longer enter a cold house. Mercury must not be used in switching elements. The liquid metal is a burden to environment if it gets to dismantling, destruction or malfunction device in environment.
In engines device opens the flow of cooling water with increasing temperature of cylinder head. In this case, the sensitive element is a wax and the opening temperature is between 70 and 90 degrees C. In these types device the sensitive element is typically a resistor whose resistance value is variable with temperature (for example an NTC thermistor), or a semiconductor device, (for example the IC LM31), which, inserted in an electronic circuit, controls the on-off state of a relay or other solid state device.
Device has long been comprised of a bimetallic system which opens a circuit when the heat reached a certain stage and closed the circuit as soon as we descended below this temperature. In practice, it was as if there had been in fact two temperature setpoints neighboring thermal system with itself a certain inertia (similar to hysteresis in field of magnetism).
The low voltage devices have long used a mercury switch associated with a coiled bimetal element for switching. This mechanism, without using a switch contact closure, offers exceptional durability. Several of these devices whose range of Honeywell T8x were popular for decades.
Today we use more electronic devices that have a reliability of more comparable to Mercury models, more accurate, and pose fewer environmental problems in later life. Most of time, the electronic models detect variations in temperature using a thermistor, that is to say a resistance which varies with temperature.
A recent development is the electronic device with built-in clock. This allows the time-dependent temperature control in room, by which one can not forget to faucet at a lower temperature when it does not have to be in room. These can therefore save money. A thermostat is device designed to maintain a constant temperature for a given system through automatic adjustment.
Clock device - is equipped with a timer and / or another form of detection to observe that the occupant has left the room and bring the room after a set period of time at a lower temperature. The energy savings can be 20% or even 50% when used in recreational where the occupation and the heating behavior is very variable.
This results in an energy saving in that it cannot happen that the boiler remains lit days in a row. The comfort is increased because there heating is available at preset times, one need no longer enter a cold house. Mercury must not be used in switching elements. The liquid metal is a burden to environment if it gets to dismantling, destruction or malfunction device in environment.
In engines device opens the flow of cooling water with increasing temperature of cylinder head. In this case, the sensitive element is a wax and the opening temperature is between 70 and 90 degrees C. In these types device the sensitive element is typically a resistor whose resistance value is variable with temperature (for example an NTC thermistor), or a semiconductor device, (for example the IC LM31), which, inserted in an electronic circuit, controls the on-off state of a relay or other solid state device.
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