International standards to Sensor naming code- to identify their type and function.

According to the international standards like IEEE, IFP sensors must have universal code to identify them, there function etc. These sensor naming code comprise of letter and numeric decimal.Say PTZ 201 means “lube oil inlet pressure transmitter sensor” plus it is used for emergency purpose like it is attached to direct

shut down or direct tripping of the machine. P=pressure, T=transmit, Z=emergency, 2=lube oil, 01= inlet. This sensor numbering technique used in Wartsila engines and auxiliaries according to ISO 3511 part 1 and 2.

So we have this that every sensor has maximum three letter and three number like PT201, TE501, TEZ501. We shall learn each letters and decimal numbers significance here. At first some example will be helpful.

International sensor coding
International sensor coding

Example of Sensor naming code:

  • PT201 – Lubrication oil inlet pressure
  • LS103 – Fuel leakage level switch
  • TEZ504A – Cylinder A4 exhaust gas temperature

Decimal number significance in Sensor naming code

  • 100 series = Fuel oil
  • 200 series = Lubrication oil
  • 300 series = Compressed air
  • 400 series = Cooling water
    400 = HT-water – High temperature cooling.
    450 = LT-water – Low temperature cooling.
  • 500 series = Exhaust gas system
  • 600 series = Combustion air system
  • 700 series = Miscellaneous systems
  • 800 series = Computer/Automation systems
  • 900 series = Gas systems

Letter significances in Sensor naming code

The first letter means measured or initiating variable,so first letter is telling WHAT is measured or controlled; Second letter is telling HOW it is measured or controlled; The third letters OUTPUT function.
So we can memorize this as like – WHAT HOW WHICH

First letter significances in sensor coding

  • E = Electrical variables
  • F = Flow, flow rate
  • G = Position
  • K = Time
  • L = Level
  • P = Pressure
  • Q = Quantity (e.g. concentration)
  • S = Speed
  • T = Temperature

Second letter significances in sensor coding

  • D = Difference
  • E = Sensing element
  • I = Indicating
  • M = Signal converting
  • S = Switching
  • T = Transmitting
  • V = Valve, solenoid, actuating element

Third letter significances in sensor coding

  • Z = Emergency or safety acting

sensor naming

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