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: What is Photoionization Detector (PID)?
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 > Fire & Gas System > What is Photoionization Detector (PID)?

What is Photoionization Detector (PID)?

Last updated: September 25, 2019 1:31 pm
Editorial Staff
Fire & Gas System
No Comments
Share
2 Min Read
SHARE

The Photoionization Detector (PID) applies ultraviolet light to the detectable gas to ionize it. This causes an ion current to be generated. The sensor measures this current to determine the gas concentration.

It detects a wide range of gases, irrespective of whether they are organic or inorganic. It is generally used to measure ppb to ppm levels of concentration of volatile organic compounds (VOCs).

This detector is used to measure toxic gaes.

Photoionization Detector (PID)

What is Photoionization Detector (PID)

The sensor consists of an ionization chamber for letting in the detectable gas (gas to be measured), an ultraviolet lamp for applying light, and positive and negative electrodes for detecting ion currents.

The detectable gas enters the ionization chamber and is exposed to ultraviolet light from the light source (ultraviolet lamp). This causes the gas to release electrons, generating cations.

The generated cations and electrons are drawn by the positive and negative electrodes, which causes a current to be generated. Since this current is proportional to the gas concentration, the sensor measures the current value to determine the concentration of the detectable gas.

Ionizing a detectable gas requires the application of photon energy larger than the ionization energy specific to that gas. Photon energy is expressed in the unit electron volt (eV). This sensor uses a lamp having photon energies such as 10.6 eV and and 11.7 eV. The larger the photon energy is, the larger the amount of detectable gas the sensor can ionize.

Source – rikenkeiki

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

Overview of Fire/Smoke/Flame/Heat/Gas Detectors
Fire Water Sprinklers Working Principle
Calibration of Gas Detectors
MOS Type Gas Sensor Principle
Oxygen Safety Analyzer
What is Gas Suppression Systems ?
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

Sensor Technologies in Gas Detectors
Manual Call Point Testing Procedure
What are Linear Heat Detectors?
Ultrasonic Gas Leak Detectors (UGLD)
Gas Detection System Abbreviations
Fixed Gas Detectors vs. Portable Gas Detectors
Basics of Fire Fighting Hydrant Systems
What is an FACP? (Fire Alarm Control Panel)

Keep Learning

Fire Alarm System Commissioning Procedure

Fire Alarm System Commissioning Procedure

Catalytic Gas Sensor Working

Catalytic Type Gas Sensor Principle

How to identify location of Fire Detectors

How to identify location of Fire Detectors

Gas-detection-system

Selection Criteria for Toxic Gas Detector

Hydrogen Sulfide Gas Detector Calibration Procedure

Hydrogen Sulfide Gas Detector Calibration Procedure

Infrared Open Path Gas Detectors Operation

Infrared Open Path Gas Detectors Working Principle

Types of Fire Detectors

Types of Fire Detectors

What is Gas Leak Detection System

What is Gas Leak Detection System ?

Learn More

Basics of FOUNDATION Fieldbus

Difference between Fieldbus, Profibus and HART Protocols

What is a Voltage Reference

What is a Voltage Reference? – Electronic Components

PTC NTC Thermistors Comparation

Thermistor Working Principle

Single Phase Preventer Relay

Working Principle of Single Phase Preventer Relay

Remote Diaphragm Seal Transmitter for Vacuum Application

Remote Diaphragm Seal Transmitter for Vacuum Application

PSV lift pressure

Calculate PSV Lift Pressure

Password Protect Apps and Files

5 Best Mobile Apps to Password Protect Applications and Files

Magnetic proximity sensors

Magnetic Proximity Detectors – Types, Principle, Advantages

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?