Dear Lab Guy, I got this Baume hydrometer (Thomas Scientific art. no 6025f91 SP Bel-Art's sku B61806-0500) and I am wondering if I can use it at high temp like 70®C, I would like to use it in my chocolate making but don't want to break it.

Dear Lab Guy, We bought a DURAC Hydrometer back in 2018 (Serial #: 4263898 ASIN: B00NG2601C Item model number: B61801-4600) on Amazon. It states everything was calibrated to the NIST but we never received a certificate. Do you know where I can find this certificate of calibration? Do you also have calibration liquids to test if the hydrometer is calibrated for purchase? Thank you!