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The location for this visit was a S.A.T.R.A (Shoes and Allied Trades Research Association) product testing facility in Kettering, Northamptonshire.

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Introduction

Kirk Surgener Unit 3: The Visit The Location The location for this visit was a S.A.T.R.A (Shoes and Allied Trades Research Association) product testing facility in Kettering, Northamptonshire. S.A.T.R.A originally began as shoe testing company when Northamptonshire was still prominent in the shoe production industry. They now test a variety of products for various companies. These products include: stab-proof vests, trainers, fire retardant clothes, chainsaw resistant clothes, various types of helmets, reflective cloth and climbing ropes. More information about the company and their operations can be found at www.satra.co.uk. We observed some of these products being tested and collected quantitative data on some of them. Below I will outline two of these demonstrations and the physics principles involved. Fire Retardant Clothes Testing Rig This rig consisted of a human shaped manikin with flame-producing burners mounted around pointing towards the manikin. When switched on the burners covered the manikin in flame, giving the effect of an extreme fire. ...read more.

Middle

The voltage produced can be used to calculate the temperature difference. If you know the temperature of one end (usually kept in an ice bath to simplify the procedure) and the particular coefficient for the combination of materials you are using, you can find the temperature of the other end. The higher the temperature difference, the higher the voltage produced, this works in direct proportion. This is how thermocouple temperature sensors work. You can use most metals to form a thermocouple to produce thermoelectricity. Below is a list of all suitable elements. As you move the pair of elements you are using further down the list, the voltage produced at a certain temperature difference decreases. Silicon Bismuth Nickel Cobalt Palladium Platinum Uranium Copper Manganese Titanium Mercury Lead Tin Chromium Molybdinum Rhodinium Iridium Gold Silver Aluminium Zinc Tungsten Cadmium Iron Arsenic Tellurium Germanium However, alloys of elements are usually used. ...read more.

Conclusion

However, thermocouples are accurate to 0.5% whereas more expensive types can be accurate to 0.01%. This difference in accuracy is usually negligible for most purposes, and so thermocouples are usually used due to the price factor. Most thermocouples are suitable for a temperature range of -200 to 1260 degrees Celsius. It is possible to manufacture different types for very high temperatures, and these can work between 1093 to 2205 degrees Celsius. If you want to exceed these temperature ranges, then you would most likely have to use another type of temperature sensor. Other Uses Another way in which they could be used is in food production. They could be used to control the thermostat for large ovens and effectively monitor the temperature inside. They could also be used in some kind of a sprinkler system, rather then the wax based ones used at the moment. This would have some safety implications as they would need their own circuit, but it would make it easier to monitor and control fires. ...read more.

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