PAL-40S is suitable to measure the concentration of Sodium hydroxide (g/100g)/water solution.
Patent for Invention Registration No. ZL200310103015.2 (China)
Patent for Design Registration No. ZL03303431.1 (China), 089244 (Taiwan)
Patent Granted in countries around the world.
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https://www.atago.net/product/?l=en&f=products-pal-top.php#AKQ57819