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Important! H-B Instrument laboratory thermometers are not approved for human use.


October 19, 2020
Image: SP Bel-Art Aqua Clear Water Conditioner

Disposal of Aqua Clear Water Conditioner

Dear Lab Guy, Can you advise if there are any special handling requirements for disposing of water treated with the Bel-Art Aqua-Clear?
October 12, 2020
Image: SP Bel-Art B61801-3500_Series_44

Hydrometer Documentation

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!
October 5, 2020
Image: SP Bel-Art H-B Durac 50:100 Percent Isopropyl Alchol Hydrometer

Measuring Alcohol Content in Sanitizers

Dear Lab Guy, I would like to purchase your item B61809-4100 to test the content of alcohol in hand sanitizer. I see that it is currently out of stock, can you recommend something to perform a comparative test, having a known specimen?
September 28, 2020
Image: H-B DURAC MAXIMUM REGISTERING : AUTOCLAVE BI-METAL THERMOMETER

Checking Autoclave Temperatures

Dear Lab Guy, We use total immersion mercury thermometers for checking our autoclave temperatures. Can these readings be taken right after the cycle is done, or does the thermometer need to be read at room temperature?
September 21, 2020
Image: SP Bel-Art Self-Zero Burette

Fixing a Leaking Burette

Dear Lab Guy, We purchased a few of your 10 mL self-zeroing burettes. We are having a problem with leaking out of the bottom of the glass stopcock. The little rubber O-ring seems to not be doing anything or maybe wasn't designed to keep it from leaking. Do you have any recommendations on how to fix it? We run 0.1N sodium hydroxide through it.