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: Helix Bimetallic Thermometer Principle
Share
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 > Helix Bimetallic Thermometer Principle

Helix Bimetallic Thermometer Principle

Last updated: March 31, 2018 8:42 am
Editorial Staff
Temperature Measurement
No Comments
Share
2 Min Read
SHARE

This article is a continuation of my previous post on Bimetallic Thermometer

Principle of Helix Bimetallic Thermometer:

When a bimetallic helix fixed at one end and free at the other end is subjected to a temperature change, the free end of the bimetallic helix deflects proportional to the change in temperature. This deflection becomes a measure of the change in temperature.

Description of Helix Bimetallic Thermometer:

Helix Bimetallic Thermometer PrincipleThe main parts of a helix bimetallic thermometer are as follows:

  1. A bimetallic helix which is fixed at one end to the body of the instrument and free at its other end.
  2. To the free end of the bimetallic helix is attached a shaft.
  3. One end of the shaft is mounted in friction less arrangement and its other end is connected to a pointer which sweeps over a temperature calibrated circular dial graduated in degrees of temperature.

Operation of Helix Bimetallic Thermometer:

Helix Bimetallic Thermometer Working

When temperature of a medium is to be measured, the bimetallic thermometer is introduced into the medium for a length “L”

The bimetallic helix senses the temperature and expands resulting in a deflection at its free end.
This deflection at the free end of the bimetallic helix rotates the shaft connected to it. When the shaft rotates , the pointer attached to the shaft moves to a new position on the temperature calibrated dial indicating the measured temperature. 
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

Burnout Function in Temperature Transmitter
Seebeck Effect Theory
RTD Calibration
Temperature Transmitter Preventive Maintenance
What to Choose RTD or Thermocouple ?
Temperature Switch Principle
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

Bimetallic Thermometer
Temperature Controller Problem
What is RTD Accuracy ?
Types of Thermocouple Measuring Junction
What is a Temperature Controller? – How to Choose?
Why have been limits imposed on the frequency ratio for thermowells?
Thermocouple Details
Response Time Test of RTD and Thermocouple

Keep Learning

Van Stone Type Thermowell

Types of Thermowells

Basic components of a Thermowell

What is Thermowell and How-to choose Thermowell Probe Length ?

Thermocouple Calibration

Thermocouple Calibration

RTD lead resistances Wiring

Resistance Temperature Detectors Working Principle

RTD

Why 4 wire RTD Measurement Accuracy is better than 2 and 3 wire RTD?

Use of Temperature Transmitters instead of Direct Wiring

RTD with Thermowell

Temperature Sensor Accessories

DTS sensors

Distributed Temperature Sensors (DTS) in Power Lines

Learn More

Thermocouples

Thermocouples

AI Technology in Video Surveillance

Next-Generation Security Surveillance Systems – AI Technology

Hammer Effect in Gauges

What is Hammer Effect in Gauges ?

PLC Program for Automatic Heating and Mixing of Products

Heating and Mixing of Products using PLC Example Tutorial

Two SOV Connections

Two Solenoid Valves Working Principle

Measurement and Calibration Objective Questions and Answers

Measurement and Calibration Objective Questions

Proportional Control Theory

Proportional-only Offset

Ladder Logic Vs. Other Programming Languages - PLC Basics

Ladder Logic Vs. Other Programming Languages – PLC Basics

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?