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Engineering Reference Materials for Thermistor Schematic
  • What is a Thermistor?

    Thermistors What is a thermistor? A thermistor is a temperature-sensing element composed of sintered semiconductor material which exhibits a large change in resistance proportional to a small change in temperature. Thermistors usually have negative temperature coefficients which means

  • Thermistor Terminology

    ZERO-POWER RESISTANCE The zero-power resistance is the dc resistance value of a thermistor measured at a specified temperature with power dissipated by the thermistor low enough that any further decrease in power will result in not more than 0.1% (or one tenth of the specified measurement tolerance

  • Thermistor Glossary

    Current-time characteristic: The current-time characteristic is the relationship at a specified ambient temperature between the current through a thermistor and time, upon the application or interruption of voltage to it. Dissipation constant (D.C. or delta ): The dissipation constant is the ratio

  • NTC Thermistor Application Guide

    thermistors are the most sensitive of all temperature sensing elements they are popular in temperature control systems. By using a thermistor in a voltage comparator circuit basic on-off temperature control as well as over-temperature protection can be incorporated. Temperature compensation Many

  • The Truth About Thermistors

    Thermistors were so named by Bell Telephone Laboratories and the name is a contraction for thermal resistors. They are resistors with a high temperature coefficient of resistance and their resistance is a function of absolute temperature. Thermistors are not new. They have been known for about 160

  • NTC Thermistor with a Voltage Comparator

    How to interface a thermistor with a voltage comparator

  
Discussions about Thermistor Schematic
  • Re: What's this component?

    I found one site that has the symbol of an MOV and a Thermistor. http://www.angelfire.com/electronic2/rch/schematic.html Also why does this device have pin numbers polarity? Seems strange an MOV and a Thermistor do not have polarity!

  • Re: What's this component?

    Thanks for the reply Mike, I have to correct those who say these are MOV's, they are NOT, they are a polymer PTC thermistor. An MOV is a clamping device, it clamps the voltage if it exceeds a certain level. These devices are more of a current "clamp", as the current through them rises, they hea...

  • Re: Resistive Current Limiter

    Are you still using this basic schematic? Did you set up the shorting contactor like I suggested back in October? If so, the current limiting resistor need only be in the circuit between the 240V input and the top terminal of Variac #2, basically just to limit the inrush through the portion of wi...

  • Re: Inrush Current

    No schematic (but what a great tool that would be for this forum...). But it isn't that difficult. Wire up a timer to the line power so that it comes on immedaitely when power is applied and a NO contact closes to another larger contactor (35A) coil after 1 second; the magnetizing inrush will be shr...

  • Re: What's This Component?

    Hi Mikerho, On searching I found this similar drawing, is a thermistor, and another drawing this time with the short horizontal line at the bottom-left, is a Varistor. It would make sense to combine these as a surge protection perhaps only accepting current from the electronics to the...

  • Re: Motor Thermistor

    Mikerho, The schematic you posted is for a BLDC motor drive, not an AC VFD; different applications. The apparent thermistors shown in there are likely "Current Limiting" thermistors; a completely different application. In that case, they use the NTC versions because when the drive is first powere...

  
News about Thermistor Schematic
  • Curt G. Joa uses EPLAN to help program PLCs

    Curt G. Joa, Inc. designs and builds large manufacturing platforms. Using EPLAN and its Schematics to automatically create schematics and help drive its RSLogix 5000 software generator saves Joa hundreds of hours in design time and labor cost for each machine it builds.

  • AT Power Supply Schematic

    Does anyone have a detailed schematic for an AT Power Supply? My intention is to intercept the DC output from the first stage,before it is converted to high frequency,and insert a separate DC Source,in effect,eliminating the need for AC input. Thanks in advance for all help on this.

  • Thermistor Resolution

    Can anyone please advise on calculation of thermistor resolution if information below are provided in design of single element wheatstone bridge - Process temperature: 25 Deg Celcius - 80 Deg Celcius - Whatstone Bridge Output 0V - 10V with 25 Deg Celcius corresponding to 0V and 80 Deg Celcius corr

  • Altium And Valydate Announce Strategic Partnership With New Design Analysis And Verification Technology

    This new technology will be unveiled January 27-29 at DesignCon 2015 and will aid in streamlining the design process and save designers countless hours from having to visually inspect schematics for errors.

  • Mars Opportunity Defies Expectations

    The Mars rover Opportunity landed on the Mars' Meridani Planum on January 25, 2004. Opportunity has traveled 26.2 miles during its nearly 11 years on Mars. To celebrate it's recently completed marathon I figured I'd post some cool images and stats about the rover. Here's a schematic of Opportunity.

  
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Product Announcements for Thermistor Schematic
Thermik Corporation
PTC Thermistors - Highest Quality

Thermik thermistors correspond to DIN 4408, DIN 44082 and IEC 34-11-2, and exhibit a very high temperature sensitivity. The resistance increases strongly in the area of the rated response temperature. This change can be used to switch off the load circuit through a triggering device. Electronic evaluations of many different applications are also possible. Advantages: Small dimensions. Fast response times. Mechanical stability. Temperature-resistance-characteristic-curves individually made...

Cole-Parmer
Digi-Sense Thermistor Meters

Digi-Sense Mini-Thermistor

Thermik Corporation
Thermistor Sensor -- LTM

Thermik thermistors correspond to DIN 4408, DIN 44082 and IEC 34-11-2, and exhibit a very high temperature sensitivity. The resistance increases strongly in the area of the rated response temperature. This change can be used to switch off the load circuit through a triggering device. Electronic evaluations of many different applications are also possible. The typical characteristics of Thermik thermistors are presented in the temperature resistance diagram. Advantages: Small dimensions. Fast...