Greetings,

I'm seeking any comments on the reliability of the Waters 490 UV-vis detector. I'm in need of a good tunable UV-vis and I've found one of these in apparently very good shape at an attractive price from a local vendor. My experience with Waters machines over the past ten years has been very good, but I am aware that some of their designs are better than others. Just to flesh things out, I'll be running it with a 616 pump, a 715 autosampler, and Millennium v3.05.01. If you have any experience with these, good or bad, I'd really like to hear from you. Please respond here or by e-mail to christopher.judd@collabo.com or juddman@peconic.net.

Thanks in advance!

The Waters 490 is a good OLD (read as not made anymore, for quite a long time now) detector. Assuming the ones you are looking at are in good shape you should have no problems. I would suggest that you contact Waters and ask how much longer that parts and service will be available for this former product.

Thanks, I'm also looking into a 486 for slightly more $ (but not much) which I think may be a better choice. It doesn't have the 4 wavelength ability that the 490 does, but I would think it would be easier and cheaper to service over the long haul. I have a PDA (996) on my main system, so I can do multi-wavelengh monitoring if necessary.

Thanks for the comments!

Chris

For Sale:

Two Waters 484 HPLC tunable absorbance detectors. Range: 190 - 600 nm.
Auto-self-diagnostics at startup.
Flow cell: dual beam Taper-Cell design, 10 mm standard. Monochromator: Seya-Namioka configuration. Grating: Concave holographic. Contains a keyboard and readout. Complete push button control for all functions.
With documentation. US$ 399.00

Please e-mail: joe@alpha.to for more info.

For sale:

Three Varian 2550 HPLC variable detectors. Range: 190 - 600 nm. Dual beam photometer.Standard cell: 8 ul volume and 10 mm path. Auto-self-diagnostics on start-up. Light source: deuterium lamp. Spectral bandwidth: 8 nm Wavelength accuracy: +/- 2 nm, reproducibility: +/- 0.3 nm. Contains a keyboard and LC display. Complete push button control for all functions. With documentation.

Each unit for US$ 300.00 or three for US$ 800.00
Shipping costs not included.

Please e-mail joe@alpha.to for more info.

Found and bought a very nice reconditioned 486 which should do just fine. THANKS to all that responded!