Inst ToolsInst ToolsInst Tools
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Search
  • Books
  • Software
  • Projects
  • Process
  • Tools
  • Basics
  • Formula
  • Power Plant
  • Root Cause Analysis
  • Electrical Basics
  • Animation
  • Standards
  • 4-20 mA Course
  • Siemens PLC Course
Reading: Thermistors and Resistance Temperature Detectors (RTDs)
Share
Notification Show More
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • Design
  • PLC
  • Interview
  • Control System
Search
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > Temperature Measurement > Thermistors and Resistance Temperature Detectors (RTDs)

Thermistors and Resistance Temperature Detectors (RTDs)

Last updated: August 18, 2018 8:05 pm
Editorial Staff
Temperature Measurement
No Comments
Share
1 Min Read
SHARE

One of the simplest classes of temperature sensor is one where temperature effects a change in electrical resistance. With this type of primary sensing element, a simple ohmmeter is able to function as a thermometer, interpreting the resistance as a temperature measurement:

Thermistors and Resistance Temperature Detectors (RTDs)

Thermistors are devices made of metal oxide which either increase in resistance with increasing temperature (a positive temperature coefficient) or decrease in resistance with increasing temperature (a negative temperature coefficient).

RTDs are devices made of pure metal wire (usually platinum or copper) which always increase in resistance with increasing temperature. The major difference between thermistors and RTDs is linearity: thermistors are highly sensitive and nonlinear, whereas RTDs are relatively insensitive but very linear. For this reason, thermistors are typically used where high accuracy is unimportant. Many consumer-grade devices use thermistors for temperature sensors.

Credits : Tony R. Kuphaldt – Creative Commons Attribution 4.0 License

Don't Miss Our Updates
Be the first to get exclusive content straight to your email.
We promise not to spam you. You can unsubscribe at any time.
Invalid email address
You've successfully subscribed !

Continue Reading

Radiation Pyrometer Working Principle
Temperature Measurement Interview Questions
Thermowell Insertion and Immersion Length
Temperature Error of 2-Wire, 3-Wire & 4-Wire RTD
How a 4 Wire RTD Works ?
Temperature Coefficient of Resistance (α)
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
Leave a Comment

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
210kSubscribersSubscribe
38kFollowersFollow

Categories

Explore More

Temperature Sensors Questions & Answers
Resistance Temperature Detectors Working Principle
Basics of Thermocouples and RTD
Spiral Bimetallic Thermometer Principle
Distributed Temperature Sensors (DTS) in Power Lines
What are the Thermocouple Applications?
What is Thermowell and How-to choose Thermowell Probe Length ?
Temperature Switch Working Principle

Keep Learning

Basic Temperature Sensors MCQ

Basic Temperature Sensors MCQ Questions Answers

RTD Calibration

RTD Calibration

Temperature Measurement Questions

Interview Questions on Temperature Measurement

thermocouple voltages

Manually Interpreting Thermocouple Voltages

Probe Thermometer

What is a Probe Thermometer? How to Calibrate and Use it?

Temperature Sensor Failure

Temperature Sensor Failure

PTC NTC Thermistors Comparation

Thermistor Working Principle

Thermowell Problems

Thermowell Problems

Learn More

Instrumentation and Control (I&C) Design

Instrumentation and Control (I&C) Design

Power Electronics Objective Questions

Sequence Controller Objective Questions

DP transmitter Elevated 10 Feet above the Vessel

DP transmitter Elevated 10 Feet above the Vessel

Manchester encoding

Foundation Fieldbus Electrical Parameters

Siemens PLC Write Protection

How to Protect Siemens PLC using Password?

SIS Failures and Reliability - Safety Instrumented Systems

SIS Failures and Reliability – Safety Instrumented Systems

Flapper nozzle system

What is Flapper Nozzle System ?

Conveyor Control with Main Motor and Backup Motor

Conveyor Operation with a Backup Motor using PLC Ladder Diagram

Menu

  • About
  • Privacy Policy
  • Copyright

Quick Links

  • Learn PLC
  • Helping Hand
  • Part Time Job

YouTube Subscribe

Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?