Temperature Sensor
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 Scythe Kaze Master 525 fan controller Silver KM01 SL VFD temperature sensor $20.00 Time Remaining: 2d 3h 16m |
 Koolance Temperature Sensor Flat 10K Ohm SEN AP007P $5.69 Time Remaining: 13d 38m Buy It Now for only: $5.69 |
 Smart Fan Speed Controller I With Temperature Sensor $10.00 Time Remaining: 26d 18h 29m Buy It Now for only: $10.00 |
 XSPC 525 Bay Temperature Sensor Frame $18.04 Time Remaining: 7d 7h 22m Buy It Now for only: $18.04 |
 XSPC LCD Temperature Sensor RED $11.35 Time Remaining: 7d 7h 23m Buy It Now for only: $11.35 |
 Smart Fan Speed Controller I With Temperature Sensor $9.00 Time Remaining: 2d 4h 46m |
 XSPC LCD Temperature Sensor Blue $11.35 Time Remaining: 7d 7h 24m Buy It Now for only: $11.35 |
 XSPC LCD Display Temperature Sensor Green $11.35 Time Remaining: 7d 7h 28m Buy It Now for only: $11.35 |
 NetBotz External Temperature Sensor TS100 Temperature sensor for Ne NBTS0100 $92.99 Time Remaining: 1d 9h 24m Buy It Now for only: $92.99 |
 Koolance Coolant Temperature Sensor Plug SEN AP006G $11.39 Time Remaining: 23d 16h 56m Buy It Now for only: $11.39 |
 Smart Fan Speed Controller I With Temperature Sensor AU $9.35 Time Remaining: 3d 10h 46m |
 Apple MacBook 13 A1181 CPU Heatsink Temperature Sensor Cooling GB0506PGV1 A $5.75 Time Remaining: 2d 5h 2m Buy It Now for only: $5.75 |
 Koolance Temperature Sensor Flat SEN AP002P NEW $5.69 Time Remaining: 9d 35m Buy It Now for only: $5.69 |
 Smart Fan Speed Controller II With Temperature Sensor $10.00 Time Remaining: 26d 18h 49m Buy It Now for only: $10.00 |
 PC Motherboard CPU System temperature sensor Lcd Panel $9.85 Time Remaining: 10d 4h 36m Buy It Now for only: $9.85 |
 Scythe Kaze Master 525 fan controller KM01 BK VFD temperature sensor BLACK $20.00 Time Remaining: 5d 23h 46m |
 Apple MacBook A1181 Cooling CPU Fan Heatsink Temperature Heat Sensors 603 8071 A $7.99 Time Remaining: 16d 3h 56m Buy It Now for only: $7.99 |
 iMac intel 24 233GHz HeatSink temperature sensor $69.98 Time Remaining: 11d 19h 24m Buy It Now for only: $69.98 |
 Speed Panel Fan Temperature Controller CPU Temp Sensor $16.79 Time Remaining: 12d 15h 27m Buy It Now for only: $16.79 |
 APC AP9520TH Temperature and Humidity Sensor with Display Black $124.20 Time Remaining: 25d 19h 15m Buy It Now for only: $124.20 |
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Milwaukee Instruments PH600AQ Ph Tester With 1 Point Manual Calibration
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DescriptionpH range: 0.0 to 14.0 pH, with one point manual calibration and accuracy of_+ 0.2 pH. Battery Life: 700 hours. Calibration solution sold separately. 30 day warranty. |
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Taylor 1470 Digital Cooking Thermometer/Timer
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DescriptionOpening the oven to check on a food's temperature means wasting the cook's time and losing oven temperature and moisture--not to mention a face full of steam. This thermometer prevents those problems. Insert the instrument's 6-inch stainless-steel probe into a roast beef or turkey and monitor the time and temperature (from 32 to 392 degrees F) on the thermometer's large digital display, which connects to the probe with a 4-foot cord... |
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CDN Digital Programmable Probe Thermometer
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DescriptionIf you've ever opened the oven door to check on a roast only to watch the heat escape while an "instant read" thermometer measures temperature, you'll appreciate this impressively-accurate, remote cable thermometer... |
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La Crosse Technology Weather Direct WD-3308U-WAL 4 Day Internet Powered Wireless Forecaster
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DescriptionTHE ENEMY WIND is one of The Weather Channel's most popular documentaries. It deals with tornadoes, their behavior and how they are generated. As it explores our historical relationship with tornadoes, THE ENEMY WIND discusses recent research into improving our ability to forecast storms and shows the work of a group of nerveless adventurers, the tornado chasers... |
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HDE Temperature Gun Infrared Thermometer w/ Laser Sight
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DescriptionAvailable in red or yellow. |
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Black & Decker TLD100 Thermal Leak Detector
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DescriptionThe Black & Decker Thermal Leak Detector helps you increase the efficiency of your home's insulation by finding leaky areas that can lead to higher heating and cooling bills. You'll instantly identify problem areas around drafty windows and doors, and uncover hidden leaks and insulation "soft spots" around your home... |
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Vicks Forehead Thermometer
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DescriptionKaz Inc V977 Vicks Digital Thermometer V977 Thermometers |
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Tenergy Smart Universal Charger for NiMH / NiCd Battery pack 7.2V - 12V with charging current Selection/Temperature Sensor
Sale Price: $17.99 |
DescriptionAccessories Included * 1 standard Tamiya Female connector and Fuse house with the smart battery charger. |
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Aprilaire Model 600 Automatic Whole-house Bypass Humidifier with Digital Control
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DescriptionThe Aprilaire Model 600 Automatic Whole-house Bypass Duct Mounted Humidifier features the, new for 2011, Model 60 Digital Humidistat Controller with a built-in blower activation relay. This newly designed model features a built-in bypass damper and utilizes new evaporative technology to minimize water use... |
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Saft LS14250
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DescriptionSaft LS-14250 1/2 AA 3.6V Lithium Primary Battery for Mac computers (non Rechargeable) |
Different Types Of Temperature Sensors Available
There are many industries that utilise temperature sensors in day to day operations. Mostly there are two distinct varieties of contact sensor used for the purpose; these are the thermocouple and resistance temperature detector or RTD. Measurement usually takes place in liquids or with contact with the target surface. Contact is not however a prerequisite, there are some temperature sensors out there that operate without contact with the target material; instead measuring the ionisation of the air caused by heat.
When selecting which type of sensor to use there a myriad of considerations that must be made depending specifically on the application. Additionally however when selecting a sensor it is important to consider the temperature range, the required accuracy and response time as these will vary with different measuring methods. When accuracy is of prime importance an RTD sensor is preferable although for those with an eye on finances, thermocouples are clearly the cheaper, more affordable option. Hopefully the following break down of the RTD, thermocouple and infrared thermometer will help operatives make the decision.
The basics of RTD operation rely on the increase of resistivity that occurs when the temperature of a material is increased. Normally RTD sensors are manufactured from metals such as platinum, nickel and copper. Predominantly copper and nickel variants are used for measuring lower temperatures while platinum, although more expensive has a wide temperature range that is useful for a variety of purposes. Normally RTDs are constructed simply, a sensing element is connected a non-conducting element made from ceramic, glass or mica. The element measures the resistance and from this reading a temperature result is gained.
Thermocouples differ from RTDs in that they utilise two different metals that are joined at one end to produce a voltage that can be converted into a temperature reading. Where the two metals meet is called the sensing junction, this junction can be connected to extension wires meaning that the physical range of the thermocouple is large. Any two metals can be used in the construction of thermocouples making them more affordable than RTD sensors. Thermocouples however can produce inaccurate results if other components are introduced into the electrical circuit as they rely upon voltage to measure temperature.
As previously stated there are other forms of sensor on the market although the two aforementioned are predominant. Increasingly infrared thermometers are being used for temperature measurement. These work through a non contact method and are subsequently used for specific applications that require remote temperature measurement. Usually they consist of a lens to focus the infrared light on a source and then using the light to take a temperature reading. As they do not need contact to measure they are frequently used as a control thermometer when calibrating thermostats and inbuilt thermometers. As well as this the infrared technology is often used in researching the heating and cooling properties of certain materials.
Hopefully this information has given the uneducated a clearer idea of the types of temperature sensor out there on the market today. Depending upon which applications they are to be used for, all three have various benefits and restrictions. Cost naturally varies but in most cases the extra cost is a necessary sacrifice to achieve greater levels of accuracy. Whether using RTDs, thermocouples or infrared spot thermometers all can produce valid and accurate results; once you have decided which will suit your needs most effectively take time to research the models out there to find the perfect solution to your temperature measurement requirements.
About the Author
Technology expert Thomas Pretty looks into the different forms of temperature sensors available on the market today.