agilent 6890/7890

[andres galeano]

Can anyone tell me the main differences between agilent GC 6890 and 7890, also between inyectors 7683 and 7693?

[willnatalie]

between the 7890 and the 6890 is kind of general you really need to add more specifics. In general I would say that the difference is in how it communicates to the computer. most 6890 GC instruments need bootp, whereas the 7890s do not making the 7890 instruments "easier" in communicating to the computer.

[Csaba]

Can anyone tell me the main differences between agilent GC 6890 and 7890, also between inyectors 7683 and 7693?

GC7890 has faster temp ramps than 6890. For injectors 7683 and 7693 are very different, see http://www.chem.agilent.com/en-US/produ ... fault.aspx
For me it is a dissapointment that the new 7693 can not use microtitre plates.

[AICMM]

Mr. Galeano,

Pressure control of the 7890 is supposed to be much better than the 6890. I also suspect there are a lot more hooks in the hardware for add on's but I have not been able to confirm that yet.

Alas, as Peter has noted before, it is getting harder to play around with the hardware outside of the stock configurations since they are locking themselves into running things a certain way..... I feel rather Quixote like these days....

Best regards,

AICMM

[DSP007]

IMHO
6890 is a good old work hopse. Not a leader by indicies, but reliable and repairs. It is a pity that his time was over and discontinued

7890 rare (unical) shit.More precise structure superimposed on the transfer of production to China, as a result of the machine between 2007 and summer 2009 - is often broken. The design makes the pneumatic post-warranty repairs expensive. Replacement units shall be subject to, and not individual parts.

[tlahren]

I've only used the 7890s a few times. I have heard many things that support what DSP007 was saying. The main differences as stated before are better computer communication and support for newer hardware (PTVs, autosamplers, different fast oven configurations, and an integrated Capillary Flow Technology (like a Dean's Switch I think). http://www.chem.agilent.com/Library/sli ... 20GCMS.pdf. If you are just doing basic GC work the 6890 is the workhorse of the world in my opinion. Very reliable with parts available through an extremely large range of vendors. You can get them used and they are very reasonable in price.

The 7693 is a lot different than the 7683. It is an XYZ robot arm (more like a Leco or Gerstel) and it can hold 150 samples I think (instead of 99). I believe it is only compatible with the 7890 and not with the 6890. I would check with Agilent though. I don't know much else about it. I know the 7683 is almost bullet proof (like the 6890) and they make a good pair.

Ty