Features: brand new and high quality There are 5 types which you can choose, 0-40/40-70/70-100/0-50/30-70. In order to obtain the most accurate reading possible, try to ensure that the liquid is as close to 68℉ (20℃) as possible, as this is the temperature that the alcoholmeter has been calibrated to (should your alcoholmeter be calibrated to a different temperature, which should be stated on the meter, ensure that your liquid is at the quoted temperature). Place your alcoholmeter in the sample and spin it do dislodge any bubbles that may have been in the liquid, and could potentially cause the alcoholmeter to float slightly higher, resulting in a low reading. Read the mark where the liquid level crosses the stem of the alcoholmeter. This is your percentage alcohol by volume. Home & Garden Tools, Home & Garden /,Garden & Outdoors Tools,Gardening / Hand Tools,Garden Tool Holders. Similar with hydrometer, but with a different measurement range (0-50% alcohol). The use of the breathalyzer is very simple. Pour the sample under test into a high glass or high chemical resistant plastic cylinder, leaving enough room for the alcoholometer to disperse the liquid. Specifications: Material: Glass Size: 9cm/ 7.48 in, 26cm/10.23 in, 22cm/8.66 in. Package Includes: 1x Alcoholmeter note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.