Temperature measurents in refineries

Temperature is critical parameter to be measured and controlled very accurately in order to obtain proper distillation of various products from crude oil .

K-type thermocouple

Commonly used temperature devices in the refineries are:
 - Thermo couples- works on   Seebeck effect
  - Resistance Temp. Devices  (RTD)
Types of thermocouples:
- K type (cromel-alumel)- most commonly used in refineries to measure temp from -200 degC to 1350 deg C.
- T type(copper-constantan) to measure temp from -200 to 350 deg C commonly uses in cryogenic applications
- R type (platinum rhodium-platinum) to measure high temp of 0 degC to 1450 degC with higher accuracy.

Advances in Instrumentaion for refineries

Dear readers,
With my rich experience in refineries,  I will be posting series of materials on Instrumentation & Control Systems in this blog, one topic at a time, for the benefit of Instrumentaion professionals, students and any one who is keen to update his knowledge.

Instrumentation & Control system plays a key role in oil & Gas industries.
The key parameters which are to be measured and controled in order to safely operate and produce high quality petroleum products are as follows:
- Temperature
- Pressure
- Flow
- Level