#temperature sensors

[futureelectronic1527]

Melexis: Temperature Sensors MLX90632 Medical

https://www.futureelectronics.com/resources/featured-products/melexis-mlx90632-infrared-temperature-sensor . Melexis MLX90632 infrared sensor is based on established far infrared (FIR) technology that utilizes the fact that every object emits heat radiation proportional to its temperature. The ultra-small device includes the sensor element, signal processing, digital interface and optics allowing integration into a wide variety of space-constrained applications. https://youtu.be/th0h-oMG6Wc

[mariteksolution]

What is a PT100 Temperature Sensor and How Does It Work?

A PT100 temperature sensor is a type of resistance temperature detector (RTD) known for its high accuracy and stability in measuring temperature. It is widely used in various industries and applications where precise temperature monitoring is essential. Let's delve into what a PT100 temperature sensor is and how it works.

What is a PT100 Temperature Sensor?

A PT100 temperature sensor is a type of RTD that uses a platinum (Pt) wire as its sensing element. The "100" in its name refers to the resistance of the sensor at 0°C, which is approximately 100 ohms. The PT100 sensor operates on the principle that the resistance of a metal, in this case, platinum, changes with temperature in a predictable and linear manner.

How Does a PT100 Temperature Sensor Work?

The working principle of a PT100 temperature sensor is based on the relationship between the resistance of the platinum wire and the temperature it is exposed to. As the temperature changes, the resistance of the platinum wire changes accordingly.

At 0°C, the resistance of the PT100 sensor is precisely 100 ohms (hence the name PT100). As the temperature increases, the resistance of the platinum wire increases linearly with temperature. This relationship follows the international standard defined by the International Electrotechnical Commission (IEC) known as the Callendar-Van Dusen equation.

To measure the temperature using a PT100 sensor, a constant current is passed through the platinum wire, and the voltage drop across the sensor is measured. Using Ohm's law (V = IR), the resistance of the sensor can be determined from the measured voltage and known current. By knowing the resistance of the PT100 sensor, the temperature can be accurately calculated using standardized temperature-resistance tables or mathematical equations derived from the Callendar-Van Dusen equation.

One of the key advantages of PT100 temperature sensors is their high accuracy and repeatability across a wide temperature range. They offer better stability and linearity compared to other types of temperature sensors, making them ideal for applications where precise temperature measurement is critical, such as industrial processes, laboratory experiments, HVAC systems, and environmental monitoring.

In conclusion, a PT100 temperature sensor is a highly accurate and reliable device used for measuring temperature based on the resistance-temperature relationship of a platinum wire. Its robust construction, excellent accuracy, and linear response make it a preferred choice for various temperature sensing applications across different industries.

[miteshrao20]

High Temperature Industrial Infrared Heating Ovens & Temperature Sensors in UAE

We at Alfa Heaters provide High Temperature Industrial Heating Ovens for various size and power output as per customer demand. For more info, call us now +971543925281 https://www.alfaheaters.ae/other-product/oven_and_accessories

[airex03534]

Igniting Excellence: Mastering Heating Elements for 5 Decades

Introducing Airex Electricals: Your Trusted Partner in Innovative Heating Solutions. With a rich legacy spanning three generations since 1973, Airex stands as the pioneer in Industrial Heating Elements, Temperature Sensors, and Controllers. Discover unbeatable quality standards and customized heating solutions for diverse industries at remarkable prices. From cutting-edge heating appliance design to dynamic home appliances, including Ceiling Fans, Electric Irons, and Commercial Hot-Plates, our expertise of 47 years ensures unparalleled understanding of customer needs. Join us in shaping the future of heating technology worldwide.

[inventionvision]

Global Sensors in Healthcare: Transforming Patient Care and Diagnostics

Global sensor are sophisticated devices capable of collecting real-time data on various health parameters such as heart rate, blood pressure, glucose levels, and body temperature. The true power of these sensors lies in their ability to wirelessly transmit this data to healthcare professionals, enabling them to monitor patients remotely and intervene promptly when necessary. 

[thetejasamale]

Growing usage of temperature sensors to boost Market Growth...

[xenomorphicdna]

On the string propaganda

Heeellll yeah

Bestie is an entire PLACE

I look at those guys and let me tell you the soul of that thing ain't just in the puppet, it's in all the neurons carrying the thoughts and emotions, it's in the power rails that serve as the heart. All the memories in the memory conflux and all the numbers we see flicker across displays, the flux condensers, the puppet; a little avatar.

No way these massive machines see life the same way we do. They have their own experiences and senses and things they hold dear. A world we can't imagine, a way of living we couldn't even comprehend.

I could never tear an iterator apart to be just a puppet. Who am I to decide how's life supposed to be enjoyed or perceived?

You treat your creechurs however you want- I ain't gonna dictate that. But damn, hearing the thrums and buzzes of the linear systems rail? They are alive with so much power, these mechanical beasts are exactly what they should be.

[feroluce]

So this ficlet-ish thing was inspired by @hydrachea, nsfw super genius extraordinaire, but also by the fact that in addition to Boothill's left eye being cybernetic, I like to hc even the parts of him that look human aren't fully natural. I mean the dude eats bullets, after all. I think he should also have vents in his mouth so he can literally blow smoke/steam, it would look super cool. Think Father Gascoigne or Studio BONES' Todoroki. We as a fandom deserve that!!

So anyway, of course, sometimes these vents get blocked up and need to be cleaned manually. Thankfully, Dan Heng is super helpful ☆

Like there's one day where Boothill is lazing around in the archives, fresh off a bounty and happily soaking up the luxury of the Astral Express after however long he's spent tracking his prey through all the dust and dirt with almost no rest.

Boothill likes it in the archives. It's not silent, but it's quiet. There's no music and only muffled voices from outside, but there's the hum of all the computer systems. It makes for a nice place to hide away and recharge when he's just finished exhausting himself.

And besides, Dan Heng is there.

Sometimes the two of them talk back and forth, but today it's mostly quiet...except for-

"I didn't know it was possible for you to get sick."

...Except for Boothill having to constantly clear his throat. That's the thing about your mark trying to flee into the desert. You either go after them and get sand everywhere (and even worse, sticky sand once it gets all bloody) or you wuss out and lose out on the bounty. Personally, Boothill likes being able to afford to eat.

"Grit's stuck in a vent somewhere, 'n' the usual maintenance ain't gettin' it. I'll prob'ly have ta manually dig it out." But later, when he's not laid out half asleep on Dan Heng's extra futon. Usually after a chase as long as this one took, he can shut down for almost a full day. He doesn't want to get up yet.

Something shadows over him, and reflex demands Boothill's eye open. Dan Heng steps around him on his way to some drawer built in the wall on the other side of the room or something. Boothill closes his eye again.

From under his hat he hears the sounds of rummaging, drawers sliding open and shut, the swish of a long coat. The shadow returns.

"Sit up, just momentarily. I have something to help." And Boothill groans a tired don't wanna, but he does it anyway, he hauls himself upright into a kneel. And then he sits up a little straighter because he realizes Dan Heng is standing right over him.

Dan Heng tells him "open your mouth," and Boothill's jaw pops open without his permission, without even a second thought, and hey, what protocol in there ok'd THAT?!?!

Before he can really unpack whatever the heck that just was, though, Dan Heng murmurs for him to say so if he needs them to stop, and then he's sliding a long, hard rod down Boothill's throat, tipped with some soft little brush he probably uses for all his fancy archival equipment.

Dan Heng tells him the handle of the brush is straight and can't be bent, he needs to move his head to be able to reach the vent in his throat. Boothill hums affirmatively; he can't do anything else with his mouth occupied.

Dan Heng's free hand holds him by his jaw, tilts it up slowly but firmly so he has to look straight up at him.

Boothill feels dizzy.

The cycle of blue blood through his artificial heart whirrs just a bit faster, his temperature sensor pings an internal alarm to warn for imminent overheating. Boothill curls his fingers into the guard over his knee as Dan Heng carefully brushes at the dust irritating him. All other sounds- the hum of running equipment, the occasional beep from the computers, the noise of the crew outside of this room- seem to pull away, until all Boothill can focus on is the steady and measured breathing from the man above him.

"Almost done."

Thank the aeons, maybe one of them likes him after all.

"Your tongue is in the way... I'm going to hold it down, ok?"

Nevermind.

The fingers holding his jaw curl around his chin, thumb slipping past open lips to dip into his mouth and pin down his tongue. One of his teeth catch on the digit, breaking skin just enough to bleed a drop where he can taste it. Dan Heng doesn't even flinch. Another temperature alarm pings off in his brain, then another, then another.

Boothill has never been shy about eye contact but oh, god, it nearly kills him when dull green irises flick away from their task and look down right at him as his mouth is held open. He quickly squeezes his own eye shut for some relief.

With his vision cut off, the rest of his senses automatically recalibrate to compensate. He can hear every breath even more distinctly now, every soft inhale and exhale, feel the strain in his neck, the softness of the brush, the hard floor beneath his knees, the hand holding his jaw and the fingerprints that feel like they should leave burns in his skin, the taste of Dan Heng heavy on his tongue-

Forget it, eye open, eye open!!

"Alright. There's one last pebble stuck."

Boothill had been trained to endure torture, back on his homeworld. It was part of being in a gang, part of being a bounty hunter.

Somehow, keeping himself quiet and still as Dan Heng inches the brush even further down the back of his throat is a profoundly similar experience.

The seconds tick by, Dan Heng's brow furrowing, face growing ever more concentrated and Boothill struggles not to watch him too closely, fights down the noise that suddenly tries to escape him as the brush withdraws-

"Swallow."

Stars and aeons, Dan Heng is going to be the death of him.

Boothill swallows. He feels it when the movement finally dislodges the loosened pebble from his vent.

His face feels shockingly cold now bereft of touch, even though Dan Heng's hands are always cool. He asks to see, and Boothill's mouth is already open again to show him, even as he belatedly realizes he could have just told him it had worked.

"Good." There's the slightest smile on Dan Heng's lips as he finally, mercifully, leans back out of his personal space, goes to put away the brush. "That should feel better now." Boothill spends a moment dizzy and dazed, feeling the need to blink spots out of his eye even though his vision is clear. He still hasn't moved off his knees.

What the fudge.

[materialsscienceandengineering]

Ultracompact fiber-tip sensor achieves high sensitivity in magnetic field and temperature measurements

Magnetic field sensing plays a pivotal role in numerous fields of medical, transportation and aerospace. The optical fiber-based magnetic field sensor possesses outstanding characteristics of compactness, long-distance interrogation, low cost and high sensitivity, which has attracted intensive interest. However, the fiber-based magnetic field sensor is generally affected by the temperature perturbation. Recently, although the temperature crosstalk can be effectively eliminated by integrating multiple sensing elements, it is at the cost of increasing the size of the whole sensing components, and the different spatial location of multiple elements could cause the measurement errors in the multi-parameter discriminative sensing. In a new paper published in Light: Advanced Manufacturing, a team of scientists, led by Professor Limin Xiao from Advanced Fiber Devices and Systems Group, Key Laboratory of Micro and Nano Photonic Structures (MoE), Key Laboratory for Information Science of Electromagnetic Waves (MoE), Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, School of Information Science and Technology, Fudan University, China, and co-workers have developed an ultracompact multicore fiber (MCF) tip probes for magnetic field and temperature discriminative sensing.

Read more.

[nostalblue]

発酵器の製作

毎年4月下旬から5月上旬にかけては新茶収穫のシーズンで、自家消費する1年分の乾燥茶葉をこの期間に製造している（激務）。最近は加工プロセスを変えながら、煎茶のみならずいろいろなタイプの茶を作っているが、こと紅茶についてはこの時季の当地の気温が本発酵工程に必要とされる雰囲気温度に満たない為、適度に加温することで発酵を促進し、より香り高い紅茶を作りたいところである。

まずは既存の所有機器の利用を考える。ホームベーカリーには生地の発酵モードがあり流用できそうにも思ったが、生茶葉を入れるにはいかんせん容量が小さい。古い電気炊飯器は容量はデカイが保温モードでも加熱温度が高すぎるだろう。

身の回りに適用できそうなものもないので、都合良い商品がないかインターネットで調べる。発酵器で検索すると多用途可能な物から特定用途のものまで様々有り、グレードも値段もピンキリだ。う～む、複雑な機能はいらないので、そこそこの収納容量があって温い温度を維持できるリーズナブルな製品はないものか。。。いろいろ探し回った結果、部品を買って自分で作ってやろうと相成った。

まずは加温する為のヒーター。そんなに熱くする必要は無く、爬虫類飼育用のパネルヒーター（上の写真左）を調達した。サイズは28cm×28cmで消費電力は28W。ボリュームで出力強度が変えられることや、それなりに防水性があるのも有難い仕様だ。価格は1900円。

そして一定の温度になるよう制御するためのコントローラ��（上の写真右）。基本的に2つの設定温度間でON-OFF制御するだけの物だが、温度センサーも付いて1000円は安いと思う。AC100V駆動タイプなのでAC/DCアダプターも不要だし、直接出力方式なのも簡単で良い。

スーパーマーケットで貰った発泡スチロール箱（無料）の内部にパネルヒーターを敷き、給電コードを箱の外側まで引き出す。逆に温度コントローラーの温度センサーは箱内部に引き入れる。

温度コントローラーは箱の外側に取り付け、その出力コードをヒーターと接続する。次に給電コードをコンセントに接続するとLEDパネルに現在の測定温度が表示されるので、出力ONとOFFの温度をそれぞれ仮設定してヒーター制御が正しく機能するかをテストする。結果問題無し。

発酵プロセスにどれだけの時間を掛けるかは仕上がりに影響する重要な要素である。なので温度コントローラーの給電をダイヤルタイマー経由にして所定時間経過後に自動で加温制御を停止させる。このダイヤルタイマーはもう30年ほど前に購入した物で、最近その存在を思い出し押入から引っ張り出して液体蚊取り器の自動停止に利用していた。まだまだ現役だね（笑）。

発酵容器はアルミ製の鍋を流用。内径33cmの大きさは我が家のガステーブルでは使いづらく、数年戸棚の奥で眠っていたが、平らな鍋底とその広さがヒーターのサイズに抜群にフィットしたのと、15cmの高さが蓋をした状態でこの発泡スチロール箱に丁度収まったため採用となった。伝熱性も申し分無いだろう。

底部から加温するため、側面は放熱緩和のためアルミ保温シートを巻いた。

制御部も発酵容器も準備が整ったので、発酵させる茶葉を入れていく。ちなみにこの茶葉は収穫後20時間ほど軒下に吊し萎調させた後、手で揉捻して発酵しやすく処理した物。温度センサーは写真では茶葉の上にあるが、実際には茶葉の内部に突っ込んだ。

上部からの放熱も緩和するためアルミ保温シートを挟んでから鍋蓋を置いた。

発布スチロール箱の蓋も閉めたらダイヤルタイマーを回して加温制御をスタートする。

実際に茶葉を入れての最初の運転なので、温度がどのように変化するかLED表示を逐一観察した。ヒーターは最大出力設定で、停止温度は28℃の設定。スタートからじわりじわりと温度が上がっていくが、あるところから急に上昇スピードが増す。停止設定温度に達してヒーター出力はOFFになるもそのまま温度は上がり続け、さらに4℃ほど上がったところで落ち着いた。その後の温度下降はとてもゆっくりで、再びヒーターがON出力されるまでにはかなりの時間が経過した。ただ二度目は最初ほどの温度上昇に至らずに温度制御するようになった。これは最初の想定とは違っていたが、適温に至った時点で茶葉の発酵が一気に活発になって自己発熱が始まり、ある程度発酵が進むと発熱も終息するということが起こった結果だと推測した。

4時間後、ダイヤルタイマーが停止設定時間に達し加温制御が停止したため、蓋を開け茶葉の状態を確認する。先の状態と比較すれば多くの茶葉が赤褐色に変化し発酵が進んだことが伺える。ただこれが最終的にどのような品質の紅茶になるかは製茶してみないとわからないし、どのような制御を掛けると理想的な品質になるかは今後設定をいろいろ変えて見極めていかなければならない。ちなみに可変要素は以下のようなところか。

・温度測定点（温度センサーの設置場所） 　　容器底／容器側面／茶葉内／茶葉上／容器空隙 ・制御温度（コントローラーの設定） 　　ヒーターOFFおよびON温度 ・ヒーター出力強度（ボリュームで設定） 　　高／中／低 ・加熱制御時間 　　2～6時間 ・容器の保温性 　　高／低 ・前処理との関係

毎年製茶作業は実質2週間ほど行うが、そのうち紅茶は3日程度なので試行錯誤に数年は掛かりそうだ。まあ焦らず気長に取り組んで参ります（苦笑）。その間に何か他の物の発酵に利用するかも知れないけど。

[adafruit]

The Adafruit BME688 sensor by Bosch offers temperature, humidity, barometric pressure, and VOC gas sensing, with features like SPI or I2C. A 'drop-in' replacement for BME680, it has controlled odor-analysis capability and can be used as an altimeter.

[miteshrao20]

High Temperature Industrial Infrared Heating Ovens & Temperature Sensors in UAE

We at Alfa Heaters provide High Temperature Industrial Heating Ovens for various size and power output as per customer demand. For more info, call us now +971543925281 https://www.alfaheaters.ae/other-product/oven_and_accessories

[inventionvision]

Best Practices for Using Strip Chart Recorders: Tips for Accurate Data Recording and Analysis

A strip chart recorder is an invaluable instrument, delivering a visual representation of variations in electrical or mechanical signals over time. Its accuracy in capturing real-time data makes it a critical tool across numerous industries.

[materialsscienceandengineering]

Researchers turn a small photonic chip into a functional temperature sensor

Similar to electronics, photonic circuits can be miniaturized onto a chip, leading to a so-called photonic integrated circuit (PIC). Although these developments are more recent than for electronics, this field is rapidly evolving. One of the main issues, however, is to turn such a PIC into a functional device. This requires optical packaging and coupling strategies to bring light into and get light out of the PIC. For example, for optical communication, a connection needs to be made with optical fibers, which then transport the light pulses over long distances. Alternatively, the PIC could house an optical sensor which requires external light for its readout. Since light on a PIC propagates in very tiny channels with sub-micrometer dimensions, called waveguides, this optical coupling is very challenging and requires careful alignment between the PIC and external components. The optical components are also very fragile so proper packaging of the PIC is vital to result in a reliable device.

Read more.

[lunar-fey]

oughhh i feel so sick

[thatboxylady]

i have a kinda silly Jetstorm headed canon that if you pet his head right between his head fins (horns???) his wings flutter happily, same goes for if you pet his back between his wings . of course this requires you to get close to and also (Primus forbid) touch him so basically no one knows this but him and Thrust perhaps lol

NO NO THIS IS GOOD 100/10