Review on Airgoesin Universal Papers Refractometer Perimeters by Lenny Sullivan

Industrial and Scientific- Measure & Inspect category has better options than this product .After I put it to the test I found it to BE inaccurate and unreliable, with fluctuating readings. The only advantage is that it is portable and easy to use. The biggest downside is the expensive price tag, which doesn't justify the poor performance. Save your money and invest in a better product..