Brief introduction: There are three indicators on the PH test paper of this product: methyl red, bromocresol green and thymol blue. Methyl red, bromocresol green, and thymol blue, like phenolphthalein, will change color according to a certain rule in solutions with different pH values. Technical Specifications: PH meter calibration buffer solution: PH: 4.00 1000ml/bottle PH: 7.00 1000ml/bottle PH: 10.00 1000ml/bottle made in China What about the product quality? For our products, each instrument must be carried out 100% quality calibration and test when delivery goods. With CE certificate, we are very confident in our products, and we will pack them with safety wooden case to protect the machine when transport oversea.
What about usage of the machine? We will also give your professional guidance(Product operating manual and video), each products comes with a USB flash drive which have all the details.
What about warranty? Guarantee one years( if the parts damage within one year, we can replace the part for free) If customer need any technical support, we can help them solve their problem through email, video meeting. We also can provide door to door service, but customer need to bear the travel fees.
What about standards support? We are strictly following different international standards such as EN, ISO, ASTM, AATC, JIS, GB ect, and had been recognized by SATRA, CSA international standard agency.
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