| Author | Message | ||
     Gavriel Levin (levin) Intermediate Member Username: levin Post Number: 16 Registered: 1-2006 |
Dear Mr. Arun, There is no difference - it is just a method of obtaining the spectrum - FT is using a fourier transform method which you should read in books on the technology - NIR is the general name for all methods - in addition to FT there is the rotating grating method such as the Foss, and it is a diffraction method. There is the AOTF - which is a diffraction by a "synthetic" grating created inside special crystal by acoustic waves that travels trhough the crystal, and there is the diode array, using a fixed grating and an array of diodes, each accepting a segment of the spectrum, such as ~4 nm in the case of 256 diodes covering the range of 800 to 1690 nm or in the case of 1024 diodes covering the range 800 to 1100 nm with silicone diodes each accepting a span of about 0.3 nm. There are overlaps due to optical resolution but we will not deal with it. The application you talk about can be done with practically all the instruemnts, with different advantage to each and disadvantage of course. In principle, I would look for an analyzer that will be process oriented, easy to maintain and require as close to zero as possible opertaor involvement. If you write to me I will tell you more, including specific information regarding your application. Gabi Levin [email protected] | ||
| Dr.K.Balasubramanian (drkbala) Intermediate Member Username: drkbala Post Number: 16 Registered: 9-2006 |
Dear Mr.Arun, You would get NIR analyser from 1100-2500 nm,.If you go for 350-2400 nm the details would be very compressed.Pl be in [email protected] | ||
| venkatarman (venkynir) Member Username: venkynir Post Number: 12 Registered: 3-2004 |
Dear Arun , please read the publications .I under stood that SWNIR is sufficient to extract information of RON and MON . | ||
| K. A. Arun |
Dear All, Can you please explain me what is the difference between FTNIR & NIR? I am looking for a application in Gasoline for analysing some parameters such as RON,MON, Cetane.... I have two options to select FTNIR Analyser or NIR analyser. Please suggest us which one is more reliable so I can go ahead with one type of proven principle. Regards, Arun |