{"id":3580,"date":"2026-10-14T13:45:27","date_gmt":"2026-10-14T05:45:27","guid":{"rendered":"http:\/\/www.champaignfiredamage.com\/blog\/?p=3580"},"modified":"2026-10-14T13:45:27","modified_gmt":"2026-10-14T05:45:27","slug":"what-is-the-temperature-coefficient-of-honeywell-temperature-transmitter-4530-7e9533","status":"publish","type":"post","link":"http:\/\/www.champaignfiredamage.com\/blog\/2026\/10\/14\/what-is-the-temperature-coefficient-of-honeywell-temperature-transmitter-4530-7e9533\/","title":{"rendered":"What is the temperature coefficient of Honeywell Temperature Transmitter?"},"content":{"rendered":"

If you work in industrial automation, chances are you\u2019ve relied on Honeywell temperature transmitters at some point. As someone who\u2019s been supplying these units for over eight years, I get asked a lot of the same questions\u2014most of them pretty straightforward, but one that always pops up when customers are calibrating systems or troubleshooting drift is: \u201cWhat\u2019s the temperature coefficient of a Honeywell temperature transmitter?\u201d It\u2019s not a one-word answer, I\u2019ll admit, so let me break this down like I would over a coffee at a trade show, no fancy jargon that makes your eyes cross. Honeywell Temperature Transmitter<\/a><\/p>\n

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First, let\u2019s start with the basics, because a lot of folks mix up \u201ctemperature coefficient\u201d with something like accuracy. Put simply, the temperature coefficient (we shorten it to TC around the warehouse) is how much a transmitter\u2019s output drifts when the ambient temperature around it changes. Every electronic component has a TC\u2014resistors, sensors, even the microchips that run the transmitter\u2014so it\u2019s impossible to get a unit that\u2019s 100% immune to temperature shifts. The key is how well Honeywell engineers design those effects out, right?<\/p>\n

I deal with two main lines of Honeywell temperature transmitters day to day: the THT3000 series, which is workhorse stuff for oil and gas, chemical plants, and wastewater treatment, and the TSTR8300, a smaller, more compact unit used in food and beverage processing and pharmaceutical facilities where space is tight. Their TCs aren\u2019t the same, and that\u2019s intentional\u2014each is built for a specific use case, so you don\u2019t pay for specs you don\u2019t need, and vice versa.<\/p>\n

For the THT3000, the TC is rated at \u00b10.015% of the calibrated range per \u00b0C. Wait, let me make that real for you. If you\u2019ve got a unit calibrated to measure 0\u00b0C to 100\u00b0C, that\u2019s a 100\u00b0C range. So a 1\u00b0C change in ambient temp would shift the output by 0.015% of 100\u00b0C, which is 0.015\u00b0C. That\u2019s tiny\u2014like a single blip on a thermometer. The catch here is that\u2019s the TC for the ambient temperature; there\u2019s also the process temperature, right? Because the transmitter is reading the process medium (water, oil, whatever) so the difference between process temp and ambient is a factor too. Honeywell accounts for that in their design, so the process-related drift is even lower\u2014\u00b10.01% of range per \u00b0C. Most of the customers who go for THT3000 are in heavy industries where the plant floor can swing from 10\u00b0C to 50\u00b0C in a single day, so this TC keeps their readings stable even when the AC acts up or a door gets left open.<\/p>\n

Now the TSTR8300, the compact one. It\u2019s not as overbuilt as the THT3000, so its TC is a bit higher, at \u00b10.025% of range per \u00b0C. That\u2019s still really good\u2014way better than generic no-name units you\u2019d find online. The difference is because it\u2019s smaller, so the components are packed a bit tighter, and the power draw is lower, which means the self-heating effect is minimal (that\u2019s when the transmitter warms itself, adding to the ambient temp shift). For the TSTR8300, self-heating contributes about 0.005\u00b0C per mW, which is negligible for most applications. I had a customer last year in a craft brewery using these for fermenting tanks\u2014they run their plant at a steady 20\u00b0C, so even with small process temp swings, this TC didn\u2019t cause any issues with their fermentation consistency.<\/p>\n

I should also mention that Honeywell lists TCs in two ways: some are per \u201cfull scale range\u201d (FSR), others per \u201cspan\u201d of the measurement. For industrial transmitters, span is more common, so that\u2019s what I quoted. A mistake I see a lot of new integrators make is mixing that up\u2014they see a TC in per FSR and it looks better, but if your span is smaller, that doesn\u2019t translate the same. For example, a transmitter with a \u00b10.01%\/\u00b0C TC per FSR on a 0-100\u00b0C range is the same as 0.01%\/\u00b0C span for that range, so it all lines up. Honeywell\u2019s datasheets spell this out clearly, and I always make sure to send my customers the exact datasheet for their specific model so they don\u2019t get tripped up.<\/p>\n

Another thing that affects TC is how the transmitter is mounted. I\u2019ve seen customers get a unit that should have a TC of \u00b10.015%\/\u00b0C end up with drift three times that, just because they mounted it near a hot pipe or a ventilation fan blowing directly on the electronics. The transmitter\u2019s sensor is isolated from the process, but the electronics module is exposed to ambient temp, so if the ambient temp isn\u2019t stable, the TC becomes a bigger factor than it needs to be. Honeywell recommends mounting the transmitter in a weatherproof enclosure if the plant has large temp swings, and that\u2019s a tip I pass on to every customer\u2014saves them headaches later when they\u2019re calibrating their system quarterly instead of monthly.<\/p>\n

Now, why does this matter? If you\u2019re running a critical process, like refining gasoline or manufacturing injectable drugs, a small drift in temperature can lead to big problems. A refinery I supply to had an issue a few years ago where they were using a cheap temperature transmitter from a competitor; their TC was \u00b10.1%\/\u00b0C, so when the plant temp dropped 10\u00b0C, the temperature reading shifted by 1\u00b0C. That made their control system adjust the heating too much, wasting thousands in fuel every month. When they switched to Honeywell THT3000, their drift was 0.15\u00b0C for that same 10\u00b0C swing, so their control system was spot on, and their utility bills dropped a ton. That\u2019s the kind of real-world impact TC has, and Honeywell\u2019s numbers are designed to keep that drift as low as possible without jacking up the price unnecessarily.<\/p>\n

I also get asked about the \u201clong-term\u201d TC, which is different from the short-term ambient TC. Honeywell\u2019s transmitters have a stability rating of \u00b10.05% of range per year, which means over time, as components age, the TC doesn\u2019t change much. You won\u2019t have to recalibrate your transmitter every six months just because the electronics are wearing out. For customers in continuous operation\u2014like paper mills that run 24\/7\u2014this is a huge deal because it means less downtime for calibration, which translates to more production and more money for their business.<\/p>\n

Wait, let\u2019s clear up a common myth: some people think temperature coefficient is the same as accuracy. No way. Accuracy is how close the reading is to the actual process temperature at a specific moment, while TC is how much that reading changes when temp changes. A transmitter can have great accuracy but a bad TC, or vice versa\u2014Honeywell\u2019s units nail both. For example, the THT3000 has an accuracy of \u00b10.025% of range, so even when the ambient temp shifts, it\u2019s still within that accuracy window because the TC is low enough.<\/p>\n

What about special applications? If someone needs a transmitter for extreme environments\u2014like arctic drilling or high-temperature furnaces\u2014Honeywell has models for that too. Their extreme temp transmitters have TCs as low as \u00b10.008% of range per \u00b0C, because they use better, more stable components (like ceramic resistors instead of plastic ones) that can handle -40\u00b0C to 125\u00b0C without drifting. I sold a few of those to a mining company up in northern Canada last year, and they said the readings were still stable after a harsh winter where temps dropped to -35\u00b0C for weeks on end.<\/p>\n

Now, let\u2019s talk about how this plays into supply, because I\u2019m a supplier, so that\u2019s my lane. A lot of the time, customers come to me looking for a transmitter with a specific TC, and I don\u2019t just pull a unit off the shelf. I ask them about their process: what\u2019s the temp range they\u2019re measuring? How stable is their plant\u2019s ambient temp? What\u2019s the criticality of the process? If it\u2019s a simple application, like heating water for a building, the TSTR8300\u2019s TC is more than enough, and it\u2019s cheaper. If it\u2019s a critical process, I steer them to the THT3000, because the lower TC will save them money in the long run on calibration and utility costs. I never push a more expensive unit than they need\u2014partly because I want repeat business, but mostly because I know overengineering a solution just wastes money.<\/p>\n

I also test every Honeywell transmitter I get before shipping it out, just to make sure the TC matches the datasheet. Sometimes a unit might have a small drift out of spec, and I send it back to Honeywell for replacement\u2014their quality control is good, but mistakes happen. Last quarter, I had three THT3000s come in with a TC that was a tiny bit higher than rated, so I sent them back and got new ones within a week, no questions asked. That\u2019s the kind of support you don\u2019t get with no-name brands, which is why my customers keep coming back.<\/p>\n

Another question I get: do TCs change over the life of the transmitter? I mentioned stability earlier, but generally, no\u2014Honeywell\u2019s components are chosen to minimize drift over time. I\u2019ve had customers tell me they\u2019ve had Honeywell transmitters running for 10 years, and when they recalibrate them, the TC is still within spec. The only time you\u2019d see a change is if the transmitter gets damaged\u2014like if it\u2019s hit with chemicals or dropped during installation, but that\u2019s not a TC issue, that\u2019s a handling issue.<\/p>\n

Let me wrap this up so it makes sense for someone who\u2019s not an electrical engineer. The temperature coefficient of a Honeywell temperature transmitter isn\u2019t a random number\u2014it\u2019s a spec tailored to the model, designed to keep your temperature readings stable even when things get hot, cold, or swing around. For most industrial uses, you\u2019re looking at \u00b10.015% to \u00b10.025% of range per \u00b0C, which is way better than the average transmitter on the market. Mounting matters, understanding the difference between ambient and process temp helps, and picking the right model for your application means you don\u2019t pay for specs you don\u2019t need.<\/p>\n

<\/p>\n

If you\u2019re in the market for a Honeywell temperature transmitter and you want to talk through which model\u2019s TC is right for your process, or if you need a quote, feel free to reach out. I\u2019ve got stock of both the THT3000 and TSTR8300, and I can get special models for extreme environments too. No hard sell, just honest advice from someone who\u2019s worked with these units for years and knows how they perform in real plants, not just on a datasheet.<\/p>\n

Yokogawa Pressure Transmitter<\/a> References<\/p>\n

    \n
  1. Honeywell, \u201cTHT3000 Temperature Transmitter Datasheet,\u201d Honeywell Process Solutions, 2022.<\/li>\n
  2. Honeywell, \u201cTSTR8300 Compact Temperature Transmitter Specification Guide,\u201d Honeywell Industrial Automation, 2023.<\/li>\n
  3. ASTM International, \u201cStandard Test Method for Temperature Coefficient of Electronic Components,\u201d ASTM B117-21, 2021.<\/li>\n
  4. Honeywell, \u201cExtreme Environment Temperature Transmitter Product Bulletin,\u201d Honeywell Advanced Technologies, 2022.<\/li>\n<\/ol>\n
    \n

    Iges Instrument Co., Ltd.<\/a>
    With abundant experience, we are one of the most professional honeywell temperature transmitter suppliers in China. Please feel free to buy high quality honeywell temperature transmitter in stock here and get quotation from our factory. Good service and low price are available.
    Address: No. 103, 1st Floor, Dacheng Commercial Building, Chezhan Avenue, Lucheng District, Wenzhou City
    E-mail: igesinst@gmail.com
    WebSite:     https:\/\/www.iges-inst.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    If you work in industrial automation, chances are you\u2019ve relied on Honeywell temperature transmitters at some … What is the temperature coefficient of Honeywell Temperature Transmitter?<\/span>Read more<\/a><\/p>\n","protected":false},"author":932,"featured_media":3580,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[3543],"class_list":["post-3580","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-honeywell-temperature-transmitter-4fed-8016ee"],"_links":{"self":[{"href":"http:\/\/www.champaignfiredamage.com\/blog\/wp-json\/wp\/v2\/posts\/3580","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.champaignfiredamage.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.champaignfiredamage.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.champaignfiredamage.com\/blog\/wp-json\/wp\/v2\/users\/932"}],"replies":[{"embeddable":true,"href":"http:\/\/www.champaignfiredamage.com\/blog\/wp-json\/wp\/v2\/comments?post=3580"}],"version-history":[{"count":0,"href":"http:\/\/www.champaignfiredamage.com\/blog\/wp-json\/wp\/v2\/posts\/3580\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.champaignfiredamage.com\/blog\/wp-json\/wp\/v2\/posts\/3580"}],"wp:attachment":[{"href":"http:\/\/www.champaignfiredamage.com\/blog\/wp-json\/wp\/v2\/media?parent=3580"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.champaignfiredamage.com\/blog\/wp-json\/wp\/v2\/categories?post=3580"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.champaignfiredamage.com\/blog\/wp-json\/wp\/v2\/tags?post=3580"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}