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 s 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.

Therefore, 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.

                                                  Fig: 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 significance 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