As we all look forward to a greener, more sustainable energy future, the promise of hydrogen based fuel cells is certainly one of the most exciting energy technologies on the cusp of mainstream acceptance. Fuel cells were a 10 billion dollar industry in 2019 and that is only growing as the technology continues to become more affordable and more efficient. CPI is excited about this promising technology and even more excited that fuel cell manufacturers are choosing CPI thermal switches as key components in their evolving solutions.
What is a Fuel Cell and How does it Work?A fuel cell is an electrochemical device that combines hydrogen fuel and oxygen to produce electricity, heat and water. Fuel cells operate without combustion, so they are virtually pollution free literally producing water as a by-product. Since the fuel is converted directly to electricity and heat, a fuel cell’s total system efficiency can be much higher than internal combustion engines, extracting much more energy from the same amount of fuel. Some modern fuel cells have an overall efficiency of almost 65% compared only 20% of a gas engine. The fuel cell itself has no moving parts, making it a quiet and reliable source of power. Of course challenges exist with fuel cells because hydrogen is not a naturally occurring element. Hydrogen must be separated from other compounds that contain hydrogen, and breaking these chemical bonds requires energy that is mostly coming from fossil fuel sources. Until renewables provide a much higher percentage of the energy grid, it is fair to say that fuel cells aren’t entirely emissions-free. And of course, in this electrochemical reaction heat is produced along with electricity and water. This heat must be managed carefully as the temperature of the fuel cell is a significant performance changing factor. That’s where CPI comes in. Managing Thermal Performance of Fuel Cells.One CPI thermal switch already seeing use in fuel cells is our AD173 bimetallic thermal switch. This switch is a small form factor switch that can detect temperatures from –18C to 148C with tolerances as tight as 2.8C. The under-clamp mounting tab makes this switch perfect for pipe or exhaust mounting and the small size and custom lead lengths mean it can fit into a tight space. Another feature of the AD series appropriate for fuel cells is the fact that it is hermetically sealed and can be deployed inside or exposed to the elements without issue. The switch is also impervious to shock and vibration for vehicle mounted cells and will not fail even under highly challenging environmental conditions. Controlling the temperature of fuel cell reactions is critical to the overall efficiency of its operation and the AD series of thermal switches has been used for both high and low temperature detection in fuel cells for different monitoring applications. Low Temperature Fuel Cell Detection & PreventionGiven that water is such an important part of fuel cell operation, careful precautions must be take to ensure that the water in a cell is not allowed to freeze. For this our AD series turns out to be a perfect solution as well. Deployed at a 35F set point, our AD series switches have been used to initiate anti-freeze protection extending the useful temperature range of outdoor fuel cells. Our AD series also offers flexible off the shelf mounting options as well as customizable lead lengths. And for those who need something more, our engineering team is able to handle custom features. Please call our team today for a consultation on your Fuel Cell Application. Original content published: www.cpi-nj.com/fuel-cell-thermal-management-by-cpi/ Power requirements in your average helicopter represent a few uncommon challenges. Consider the startup power required to get those turbines spinning. Then the instantaneous braking force necessary to respond to the pilots commands in real-time as he dips and rises to navigate safely.
All of that requires a pretty powerful engine, and that engine is lubricated by a whole lot of oil. Over a long trip or in hot/dusty conditions, that oil gets hot, too hot to be a very effective lubricant or coolant for the engine. If it remains too hot for too long, even specialized lubricants can break down and so oil temperature control has become a key safety subsystem in many high power, high rpm engines and motors on many kinds of military and industrial vehicles, boats and planes. CPI Thermals are Helping the Next Generation of Helicopters Fly The road to a world filled non-polluting electric vehicles doesn’t stop with cars. Manufacturers like Kopter helicopters of Switzerland already have their eyes on the prize. Per CEO Gian Piero Cutillo, of Leonardo who recently acquired Kopter, “… (Kopter) will act as a competence center for new light helicopters, developing future advanced technologies, especially in the areas of hybrid/electrical propulsion”. Key to the success of this future roadmap is their new AW09 light helicopter. This is the first all new single engine helicopter design in over 4 decades, reimagined to be a design that could someday represents the world’s first hybrid chopper. The powerful Honeywell HTS 900 turbine engine with 1020 hp is of particular interest to operators who wish to avail themselves of hot and high altitude performance. But a critical single engine design requires a critical, fail-safe cooling system. “For Kopter we actually created a custom version of our AD series SnapStat Thermal Switch with a MIL STD connector”, notes John Crozier of CPI. “The thermal switch is installed in an oil cooler heat exchanger for the helicopter”. As is common to many CPI thermal switches used in this application, the switch activates when the oil temperature is above the thermal activation temperature (pre-programmed set point). The signal is used to switch a cooling fan on or off depending on the oil temperature. Several Characteristics Make CPI Thermals Perfect for Heat Exchangers According to Crozier, CPI’s SnapStat line of Thermals are finding their way into more and more heat exchanger designs for a number of reasons.
Original content published: www.cpi-nj.com/cpi-thermal-switches-tried-and-true-for-aviation-applications/ For engineers looking to solve demanding temperature switching applications, robust, standalone thermal switches are surprisingly hard to come by. A quick google search yields hundreds of parts in a confused presentation of thermals, with every shape and size represented, sold everywhere from Alibaba to Amazon. But for the endurance focused designer, there might as well be 0 results.
Sometimes Slow is Good…In the world of thermal switches, bimetallic switches generally belong to one of two categories:
Electrically, our switch handles up to 2A at 28V off the shelf, but custom values are possible. No matter what variation you get, the quality of this thermal is in keeping with the quality of the parts that make it.
CPI Plugstat switches have been used on tanks and planes both military and commercial for oil overtempt, and hydraulic fluid temperature sensing where designers wanted a reliable, long lasting, standalone thermal sensor in places not so easy to service. These kinds of applications are really made for the CPI M-series Plugstat switches. Also available in hermetically glass sealed version. Contact CPI Thermal engineers today to discuss your application or visit https://cpi-nj.com Originally posted: https://www.cpi-nj.com/blog/cpi-plugstat-thermal-switches-getting-there-slowly/ While most companies are riding out the pandemic with some degree of production and sales, one area that has seen disruption across the board is related to supply chain dynamics. Remember how hard it was to get toilet paper for a while? Well toilet paper availability has largely returned (thank goodness..) but inventory and demand remain out of sync for all kinds of manufactured goods needed for all kinds of production. Add to this, the uncertainty of the trade and tariff situation with respect to China where so many cheap offshore parts and subassemblies are made, and we understand why lead times, and radical price increases have become all too common.
Nowhere has this been more true than in aviation, where manufacturers are finding that their offshore components either aren’t available or are now going to cost 2 or 3 times what they used to. CPI has seen the trend affect our thermal switch line, albeit in a good way as many avionics manufacturers have come to us for thermal switch replacements for various avionic subsystems. Our thermal switches were always of higher performance than what they were using but the irony is that now in many cases they are price competitive in quantity, with formerly less expensive solutions. One advantage of our Made in the USA manufacturing is that our costs and distribution models are largely unaffected by the pandemic since we’re sourcing and building everything locally. Who’s using CPI thermal Switches and for What?CPI Thermal Switches have a long history of use in both military and commercial avionics system that continues today. We have three lines of Thermal Switches covering temperatures from 0F to 1750F, a range very few manufactures worldwide can even produce. All boast highly accurate, factory programmable set-points, and the robust endurance parameters the world has come to know from CPI. Whatever Application you’re flying with, CPI thermal switches were actually designed for aviation applications. Here’s just a few ways they’ve been used Fire Detection – In every application from galley fire detection, to engine and avionics bay temperature detection, in planes from Ebaraer’s Novaer Training, to large military aircraft where their exact usages are classified, fire detection is a mainstay of CPI thermal use because of their high temperature capability. Over Temperature Detection – The list of over-temperature detection applications in aviation is long. It includes such applications as engine over-temp, generator over-temp, APU backup temperature monitoring, environmental control system fail-safe, gear box OT on rotary wing aircraft, hydraulic fluid OT, and much more. Because our switches operate standalone and do not require an external computer to initiate close/open, they are preferred in applications that are critical for fail safe operation. Freeze Detection – Most think of thermals checking when things get too hot, but our switches are one of the few in the world that can check when things get too cold! In a weapons system, this can be used to ensure that internal heaters are activated that prevent the electronics from failing due to freezing conditions. Custom Solutions – CPI has a long history of making custom thermal switch solutions for clients, that meet their requirements without compromise. For more information on whether we can make the right solution for you, call our engineering team directly CPI Thermals are Right for Aviation, Pandemic or Not.For more information on CPI Thermal Switch lines and their unique capabilities, please visit our website or contact an application engineer today. Originally posted: https://www.cpi-nj.com/blog/cpi-thermals-pick-up-slack-in-aerospace-aftermarket/ Engineers and procurement specialists at companies large and small deal with the challenge of part and product obsolescence each and every day. Typically it goes something like this: A subcontractor who make one or more critical parts for a larger machine or system, has gone belly up. The system is still deployed in the field and the cost and logistics of replacing it makes this option a complete non-starter. So when the sub-component breaks, spares become a problem very quickly. In another scenario, particularly in military equipment, the list of manufacturer’s able to supply a component has dwindled to a few or even just one (single source) As a result, than manufacturer has jacked up the price for their part from $15 per part to a whopping $785.27 per part. While that still may be a fraction of the cost of the system, it doesn’t make anyone happy to know they are paying a premium just because there is no competitive or qualified alternative. How CPI helps with Product Obsolescence Challenges. Solving product obsolescence challenges is seldom a matter of buying a different off-the-shelf item. It usually requires re-engineering, specialized design, and even re-qualification of the new sub-component and/or new solution. At CPI this is exactly what we’ve been doing for decades: taking our line of extreme duty electro-mechanical switches and sensors and making incremental changes to adapt them to new (or old) applications. It’s the bread and butter of our engineering competency. Here’s a couple examples of the kind of work we’ve done CPI Linear Position Sensor Hydraulic Retrofit Application In a heavy duty hydraulic cylinder application, Dupont had designed their system using Curtiss Wright linear position sensors (long stroke LVDTs) which have been discontinued. After discussions with our engineering team, Dupont chose our SL0390 as a replacement solution to monitor the stroke position on so called “intensifier cylinders.” These intensifiers are high pressure hydraulic devices that inject initiator into polyethylene autoclave reactors. They picked the SL0390’s for this application because it was easy to adapt their existing external mounting hardware to the SL0390 from the old LVDT sensors, which were about 24” long. According to the customer, the environmental conditions for the SL0390 installations are indoors and out of the weather, but not climate controlled so a level of robustness was a necessity. Per the Dupont Engineer, “The environment for these cylinders is industrial and often times hot and dirty just like any petrochemical plant along the Gulf Coast. We installed the first SL0390’s in June of last year (2017), and have been replacing others as the old LVDT’s fail on the other cylinders on the all of manufacturing units. To date, all installed SL0390’s are still in service and working properly.” We’re not surprised. The SL0390 sensor is built to take a licking. CPI Thermal Switch Retrofit on Chinook Helicopter When Sensata thermal switches used to monitor the hydraulic system on the Army’s Chinhook Helicopter became obsolete, CPI was chosen to replace these thermal switches. We were able to do it with small modifications to one of our own thermals. While the original switch was most similar to our AD096 bi-metal thermal switch, the 7/8″ mounting thread and ITT connector required were not part of our standard offering. With simple modifications, CPI created the AD192-502, a form, fit function replacement. Another consideration is that CPI can make these parts for small production runs, the kind that bigger companies won’t be bothered with. The above run was for 40 pcs, though CPI is fully able to scale production to thousands of parts per month out of our USA based manufacturing facility in East Hanover New Jersey. Retrofit and Obsolescence are Friends of Ours. We provide Form-Fit-Function replacement of switches and sensors in the following area’s
For over 70 years, our product line has succeeded in the worlds toughest application scenario’s. Call us today for more information. Original content posted on https://www.cpi-nj.com/blog/when-part-obsolescence-engineering-opportunity/ CPI’s X1 thermal switch is being increasingly used by both American and European avionics manufacturers and integrators as their thermal switch of choice for spot detection of overtemperature conditions in systems throughout the aircraft. Recent integrations include FAA approval as a Fenwal replacement on Gulfstream jets, use in the De Havilland “Twin Otter” aircraft, and use by specialty aircraft manufacturer Diamond Aircraft in Europe to name a few of the most recent. But actually, CPI’s thermal switches have been flying around the world in commercial aircraft for decades. The recent uptick in design-ins may have something to do with manufacturers realizing that in addition to superior thermal performance, vibration resistance, and electro-mechanical endurance, our switches are just a whole lot less expensive than Fenwal, and other solutions commonly used. Thermal Switch Uses in Modern Aircraft All modern aircraft employ a number of thermal sensing elements for aircraft systems. So called Spot Fire Detection Systems refer to systems where overheat conditions are monitored at a specific point in a compartment or LRU bay. In order to receive FAA approval, these systems must demonstrate superior detection performance and have the proven ruggedness to survive in the harsh thermal and vibrational environment of modern aircraft. Typical zones on aircraft that employ spot fire detection include:
Several detectors, or sensing devices, are available to solve these detection challenges, encompassing a number of different technologies. Many modern aircraft have some type of thermal switch system or thermocouple system. A thermal switch system has one or more indicator lights or audible alarms that trip when a thermal limit is reached. They are sometimes connected in parallel with each other but in series with the indicator lights. If the temperature rises above a set value in any one section of the circuit, the thermal switch closes, completing the light circuit to indicate a fire or overheat condition. No set number of thermal switches is required; the exact number is usually determined by the aircraft manufacturer. On some installations, all the thermal detectors are connected to one light; on others, there may be one thermal switch for each indicator light. CPI Rod & Tube Series Thermal Switches for Avionics Applications Recently CPI thermal switches like our X1 have seen increasing use as replacements for other thermals owing to their extreme mechanical endurance, setpoint precision, and much lower unit cost making them extremely good choices in spares and retrofit applications. In a recent retrofit application undertaken for a Gulfstream, the CPI X1 thermal switch was qualified to replace the equivalent Fenwal Switch for almost half the cost. The CPI X1 Thermal Switch has 100% equivalent functionality and accuracy with arguably superior electromechanical endurance. CPI’s X1 Series thermal can maintain a setpoint anywhere from 0 to 850F, with a +/- 5F tolerance standard. Tighter tolerances are available. CPI thermal switches are made entirely in the USA at our manufacturing facility in East Hanover New Jersey. For more information, Contact your CPI Solutions team today. Original content posted on https://www.cpi-nj.com/blog/aircraft-fire-detection-spot-fire-detection-systems/ The International Space Station (ISS) may be one of the most underappreciated technological (and geopolitical) marvels on, or off the planet. While it has been under development since the 1990’s it is actually the joint effort of five different space agencies representing 15 countries, all of whom contributed technology and resources to the ISS, especially the United States and Russia. It is a shining example of what scientists across borders can do together when focused on a common technological challenge.
The space station is the largest structure ever assembled in space. Orbiting at about 248 miles above the earth it is so large that it is often visible at night to the naked eye. It is longer than a football field (including the end zones) and can sleep 7 astronauts. It has habitable space often compared to that on a 747 jumbo jet, or about the size of a 5 bedroom house. The ISS has been populated by astronauts since November of 2000 and has been populated non-stop for the almost 18 years since. Its useful accomplishments range over almost the entire spectrum of scientific discovery. For instance, scientists were able to grow proteins in space with a near-perfect crystalline structure. These proteins have unique properties that prove useful in the development of new drugs. Also the detection of “dark matter” long predicted by physicists, was accomplished using the Alpha Magnetic Spectrometer, deployed on the space station. This discovery sent shock waves through the scientific community, a moment as pivotal as Einstein’s E=MC2. These achievements and many more were only possible over a long period in the pure gravity free environment afforded by the ISS. Technology and Experiments Aboard the ISS Needless to say, the ISS houses some of the most sophisticated technology and experiments that NASA and other space agencies can think of. Safety of the astronauts and “space tourists” that visit and reside there is of paramount importance. The stringent testing and documentation required by vendors and space agencies providing parts and subsystems to NASA, is well known to every subcontractor. One of the experiments headed for the ISS from NASA is called the Flow Boiling and Condensation Experiment (FBCE), a joint effort between the Purdue University Boiling and Two-Phase Flow Laboratory (BTPFL) and the NASA Glenn Research Center. The experiment will fly aboard the International Space Station sometime in 2020 for two years or longer. The purpose of the FBCE project is to develop an integrated two-phase flow boiling and condensation experiment for the ISS to serve as a primary platform for obtaining two-phase flow and heat transfer data in microgravity. One of the key safety concerns of the FBCE experiment involves preventing the formation of a highly dangerous gas during the boiling phase of the experiment. The system uses a special fluid called perfluorohexane as the primary boiling/condensation substance, however when this substance exceeds 200C it can degrade into a highly toxic gas called Perfluoroisobutene (PFIB). PFIB when inhaled can cause pulmonary edema and other heart disorders. The goal is to have thermal switching in place at setpoints well below the 200C to prevent such an occurrence. CPI’s Thermal Safety Solution for the FBCE. CPI was approached by NASA to consider the use of a thermal switch solution based on our M1102 “PlugStat” series of thermal switches. The PlugStat Series of close tolerance, bimetal thermal switches act as a robust and accurate temperature control switch in a wide variety of thermal control systems at temperature ratings from 17C (0F) to 343C (650F). This is a slow make and break, open-on-rise device that is hermetically sealed, with 1/2-20UNF-3A thread mounting. Despite NASA’s stringent material and electrical requirements, CPI’s off-the-shelf M1102 met their need for a reliable, space deployable, thermal safety switch solution. Our switch uses:
Our standard electrical rating of 2A at 28V was able to meet the electrical needs of NASA in the application. Additionally CPI provided all applicable CoC’s, Material Test Reports, and Chemical Analysis’ required to meet NASA’s stringent quality control. CPI Thermal Switches – Good for the International Space Station…Good For You Too. Sometimes a robust thermal switch is what you need, remote sensors and controls systems have their place, but in tough applications, they have their limits too. The chances are that the team at CPI can fit our thermals into whatever application you have, without expensive customization. Call the thermal switch engineering team today to discuss your application! Original content posted on https://www.cpi-nj.com/blog/cpi-thermal-switches-keeping-astronauts-safe-on-the-iss/ The vast majority of thermal switch applications we get have to do with keeping things from getting too hot. Just a few examples of this include:
The list continues but most of these applications are essentially safety systems where our high temperature thermal switch products are uniquely capable and reliable. They detect a high temperature and then close or open to activate a cooling system, an alarm, or a slowdown of the machinery to restore acceptable thermal limits. The Navy’s Phalanx Gun Firing System In an interesting twist on our normal thermal switch applications, one of our SnapStat series, flange mount thermal switches, is being used to heat things up! The Phalanx system is part of a family of military defenses referred to as “Close-in Weapon Systems” (CIWS ) They are designed to engage anti-ship cruise missiles and fixed-wing aircraft at short range. Phalanx is the most heavily deployed CIWS with thousands of these guns mounted on US naval vessels and exported to allies around the world. Like other close-in weapon systems, Phalanx provides ships with a terminal defense against anti-ship missiles that have penetrated other fleet defenses. Phalanx is unique in that it combines search, detection, threat evaluation, acquisition, track, firing, target destruction, kill assessment and cease fire into a single, small deck footprint, mounting. The electronics on Phalanx are complicated and actually work most reliably at a higher operating temperature. In this application our AD006-501 will trigger when ambient temperature in the electronics bay drops below 70F. This activation triggers heaters built into the gun to keep circuit boards in the bay from getting too cold! In this application, our AD006, part of our SnapStat line of thermal switches (0 – 300F) switches almost 10 amps of resistive power. It is set to close-on-fall at 70F but our thermal switches are available in all varients (close on rise, open on fall, etc…) CPI Thermal Switches for Military Applications CPI is certainly a well seasoned supplier of military grade, thermal control components, having produced parts for the US military for over 70 years. We maintain these designs through the years, supporting the military’s upgrade and obsolescence programs, providing drop in replacements when older thermal switches from other manufactures cannot be produced any more. Whether you’re trying to keep it hot or cold in your application. CPI’s thermal switches get the job done. Call our engineering team today! https://www.cpi-nj.com Original content posted on https://www.cpi-nj.com/blog/cpi-thermal-switches-are-heating-up/ If you’re a manufacturer of high pressure, high horsepower industrial air compressors, like the kind that might be used in large drilling or mining operations, you need to know that the Mine Safety and Health Administration has new safety requirements affecting high horsepower, recirculating type air compressors. The issue is related to the fact that an overstressed compressor can get extremely hot. So hot in fact that it can approach the flashpoint of the compressor’s lubricating oil. Indeed this is a common concern in machinery generally, where normal operating temperatures are driven to extremes by deployment in hot ambient environments, or extended non-stop usage, or even equipment failure. Thermal runaway monitoring is a common problem in industrial compressors, generators, pumps, essentially anything that uses a motor and oil. It is a problem that CPI thermal switches were designed to solve. CPI Snap Stat Thermal Safety Switches – A brief Primer. The key engineering concerns of designers looking for thermal safety in industrial applications are typically the robustness of the thermal switch, and the accuracy of the set point. In most thermal safety applications temperature set points are well known, being driven by the flash point of lubricants, with a wide safety margin, typically 50F or more. Upon reaching the flash point safety point, the thermal switch will trip, shutting down the compressor, generator, or motor. It can also be used to put the machine in a lower rpm state for critical systems. Below is an image of the internal construction of our Snap-Stat switches The CPI SnapStat Switch is designed for durability and reliability above all things. With a temperature range from 0 to 300F they cover most of the flash point settings common to high power machinery lubricants. Set points are built in at the factory and remain fixed and reliable for the life of the switch. CPI’s SnapStat thermal switches have a bimetal snap disc that actuates a miniature microswitch . This double snap action makes these switches virtually immune to shock and vibration. Epoxy sealing or glass to metal hermetic sealing makes them ideal for demanding industrial or military applications. Example of SnapStat use on a Commercial Compressor One of the most common mounting options chosen by equipment manufacturers is exemplified by our AD-173, a pipe clamp mount version that integrates easily to existing designs. Our client, a large compressor manufacturer for reciprocating type air compressors, uses our sensor on the compressor discharge line to monitor temperature. Locations and setpoints for the sensor may vary depending on whether you are designing in, or retrofitting into your compressor. Other options include surface mount, thread mount, flange mount, and custom configurations. CPI Thermal Switches are Problem Solvers For Machine Safety. We’ve been creatively solving thermal safety problems for equipment manufacturers for over 60 years. Whatever your application, chances are we’ve got a robust, off the shelf solution for you. Give CPI a call today to discuss your Thermal Switch Applicatiion. Original content posted on https://www.cpi-nj.com/blog/new-msha-specification-requires-compressor-thermal-monitoring/ When CPI started making thermal switches for the Military in the 40’s, there really wasn’t any other choice. Thermocouple based switches with variable set-points and various temperature ranges of operation were made using the thermocouple materials of the day, mostly copper, aluminum, and chrome. The concept of a thermocouple had been around for over 100 years but CPI switches of that time stood out because they provided reliable operation over an extended temperature range, in an environmentally hardened package suitable for battlefield conditions. Temperature switch technology has evolved over the last 75 years however, and depending on what you’re trying to do, alternate thermal switching technologies abound. For instance, in applications where smaller temperature differences need to be measured with high accuracy (like from 0-100C at 0.01%), technologies like thermistors, temperature sensors tied to external control systems, or simple resistance thermometers may be more suitable and cost effective. Still, traditional thermal switches have evolved too. The variety of types, and use of metal alloy’s has been informed by discovery, experimentation, and improvements in manufacturing processes. Today’s CPI thermal switches come in three basic types, covering a thermal range from 0 to 1750 degrees Celsius. And as always, CPI switches maintain their hardened design making them unique in the world for their electromechanical endurance, and their survivability. Thermal Switch Applications Perhaps one of the best ways to understand the applications that are better suited for thermal switches vs. sensors is to look at common applications for these switches. Galley Temperature Sensors – Prevention of galley fires is critical on both Navy Ships and around any high temperature professional cooking stations. With flash points over 1000 degrees, these systems usually do not have a controller and so local switching to turn of gas supply or raise an alarm is appropriate. Steel Manufacturing – Thermal Switches are used extensively in the steel and iron industries to monitor temperatures and chemistry throughout the steel making process. Disposable, immersible, type S thermocouples are regularly used in the electric arc furnace process to accurately measure the temperature of steel before tapping. The cooling curve of a small steel sample can be analyzed and used to estimate the carbon content of molten steel. Engine Cooling Fan Control – Thermal Switches are commonly used to locally control cooling fans which prevent engine overheat on everything from generators to jet engines. Gas Shut-Off – In systems using pilot lights, a thermal switch will often sense the presence of the pilot and shut off gas flow if the pilot should go out for any reason. Oil Refining – Control of temperature in the oil refinery requires accurate and hardened thermal sensing for many fail-safe systems in the refining process. Avionics Bay Over-Temp – In both commercial and military aircraft, ambient temperature in the avionics bay can reach well over 100 degrees C as components heat up, contributing to early system failure. Thermal switches are used here to economically activate cooling systems. CPI Thermal SwitchesOur three lines of thermal switches include the following.
All switches are characterized by flexible mounting options, highly accurate and programmable set points, and hardened construction for extreme environments. For more information on CPI thermal switches, please contact our engineering team today. Original content posted on https://www.cpi-nj.com/blog/when-to-use-a-real-thermal-switch-not-a-sensor/ |
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