Digital Hand-held "Pocket" Formic acid Refractometer PAL-31S

>about the icons Model PAL-31S Cat.No. 4431 Measurement Range Formic acid 0.0 to 20.0% (g/100g) Temperature 10.0 to 40.0°C Resolution Formic acid 0.5% (g/100g) Temperature 0.1°C Measurement Accuracy Formic acid ±1.0% (g/100g) Temperature ±1°C Ambient Temperature 10 to 40°C Measurement Time 3 seconds Power Supply 2 × AAA Batteries International Protection Class IP65 Dust-tight and Protected against water jets. Dimensions & Weight 55(W) ×31(D)×109(H)mm, 100g Optional • PAL-CASE : RE-39409 • STRAP: RE-39410 Patent for Design Registration No. ZL200310103015.2 (China) Patent for Invention Registration No. ZL03303431.1 (China), 089244 (Taiwan) Registration pending in U.S.A., and Germany and all other countries around the world.