ao refractometer 1

Here's the deal:

You buy this unit for $75
You pay me (ichudov@algebra.com) $75 via paypal right away
You use a confirmed address
I will ship it next day priority mail, with insurance.
No postage charge.
You will get it on the third day (if priority mail works).

All you have to do is to Buy It Now and pay me exactly $75. I accept checks as well, but processing them will of course take more time.

This is an absolutely new (new old stock) American Optical Refractometer. It has a sealed screw for calibration. It also includes the manual. It has automatic temperature compensation.

It cost the federal government $1,247.38. You can own it, still new, at a fraction of the original cost. Here's the Federal NIIN information.

It was originally made for measuring blood serum or urine, however there is a general scale with the serum scale on the side. So you can use it to measure any other things, such as wine, fishtank salinity, etc etc. All you need is a conversion table, which are readily available for most commonly sought characteristics. It is compensated for temperature.

The refraction scale is from 0 to 320 (32%), 2 (0.2%) intervals. The image is very clear when viewed against a light. A manual is included.

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(Click on the thumbnail images to enlarge)