We are independent & ad-supported. We may earn a commission for purchases made through our links.

Advertiser Disclosure

Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.

How We Make Money

We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently from our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is a Temperature Transducer?

By Alexis W.
Updated May 17, 2024
Our promise to you
AboutMechanics is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At AboutMechanics, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

A temperature transducer is an electrical device usually used in automated air-temperature control sequences. Its purpose is to take a measurement of the air temperature and relay the information — after translating it into a readable form — to a power source for the mechanical part of the system. Once the information has been taken by the temperature transducer and relayed, the information is sent to the unit power source. Usually, when a transducer is telling a mechanical unit, such as a furnace or a cooling system, that it needs to engage in order to create the desired temperature, it will also tell the unit when it has reached that desired temperature. This signals the unit to disengage, allowing for the efficient operation of many central air or heating units.

When the unit power source reveals the information from the temperature transducer, it either tells the system to stand idle or engage depending on the temperature that has been measured. If the temperature reads lower than the setting input to the system by the user, the heating unit is told to engage until the air is measured by the temperature transducer to be as high in temperature as the user desires. The same principle is applied to cooling systems, however in these cases the temperature is read to be higher than the setting input before the cooling system is engaged.

Temperature transducers send the information they collect to more sources than just the power source for the heating or cooling unit. Digital thermostats installed in many households and businesses utilize digital LCD screens to display the information that is read by the temperature transducer. The transducer measures the air temperature and translates it into information the screen is able to display at the same time the information is being sent to the power source telling it whether or not to engage.

These transducers can also be used in a number of useful applications, from telling an individual the outside temperature from inside the house or building, to informing researchers at what temperature a certain chemical or physical reaction happens. The transducer itself is basically a sensor that has the ability to transfer the information it obtains to another medium in a form different than it was originally read. This information can be translated back to a digital screen, without having to tell any sort of mechanical unit to actuate, disengage, or take no action.

AboutMechanics is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.

Discussion Comments

By anon1000785 — On Dec 30, 2018

@anon309817, it doesn't.

The transducer voltage or current reading would most probably be converted to a digital signal (ADC). This data would be read by a CPU which in turn would decide on the action to take based on the set point programmed into it.

This decision would then be relayed (most likely through) a DAC to the heat pump.

The article is very misleading as it deviates in its narrative from a strict description of a transducer.

By anon309817 — On Dec 18, 2012

How can a temperature transducer control a pneumatic control valve in a heating and cooling system?

By MrMoody — On Sep 28, 2011

@NathanG - I wish I had the same story to tell. Our AC stopped working too, and the temperature sensor was the first place the technician checked.

It turned out that it was working fine. That left the air conditioning unit, and sure enough it was on its last leg.

In hindsight I learned that we had missed out on some preventative maintenance, like filter changes. Most importantly, we shouldn’t have kept it running at full blast during the summer months.

Oh well, we know better now. Be good to your air conditioner and your transducer.

By NathanG — On Sep 27, 2011

People worry about having their air conditioning or heating units going bad. But you should be just as concerned about a faulty temperature sensor in my opinion.

That happened with us one summer. It was very hot; we “told” the transducer what temperature we expected inside by setting the thermostat, and the unit failed to engage.

I thought the air conditioning unit went bad, and in my mind I heard the “cha ching” of how much a new unit was going to cost me. However, after we called the heating and air people the technician said that it was a faulty sensor, which he was able to fix for a lot less money than I would have spent on a whole unit.

AboutMechanics, in your inbox

Our latest articles, guides, and more, delivered daily.

AboutMechanics, in your inbox

Our latest articles, guides, and more, delivered daily.