Input-Output Relationships of Transmitters
  • Formulas

Input-Output Relationships of Transmitters

Have you ever had that actually forget something simple? And generally forgotten it was in the form like a formula.…

  • Fire & Gas System

Catalytic Gas Detectors Principle

Catalytic gas detectors are based upon the principle that when gas oxidizes it produces heat, and the sensor converts the…

  • Fire & Gas System

Gas Detectors Installation Techniques

When considering the design of a combustible gas detection system, it is important to select the correct product for the…

  • Standards

Comparison of IEC & NEC Area Classifications

National Electric Code (NEC) Class I Any location in which flammable gases or vapors are or may be present in…

  • Fire & Gas System

Standard Gas Detection Definitions

Volume CH4: The percentage by volume of combustible methane gas in an area. At 5% volume the mixture of methane…

  • Fire & Gas System

Infrared Gas Detectors Working Principle

The Infrared (IR) detection method is based upon the absorption of infrared radiation at specific wavelengths as it passes through…

  • Practical Questions

Draw Limit Switch Symbol ?

Limit switches are often used on the doors of electrical enclosures and cabinets to automatically shut off power or shut…

  • Fire & Gas System

LEL vs Percent By Volume vs Parts Per Million vs Parts per Billion

Unless you have a technical background, the concept of measurement scales can be complicated. I can’t tell you how many…

  • Fire & Gas System

Why LEL important in Gas Detection?

In environments with combustible gas hazards, it is important to know long before the gas concentration reaches the LEL. Typical…

  • Fire & Gas System

What is Lower Explosive Limit & Upper Explosive Limit ?

The primary risk associated with combustible gases and vapors is the possibility of explosions. Explosion, like fire, requires three elements:…