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  • For advice on SP lab equipment, supplies, etc.
  • How to make something work - products, processes, applications
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Important! H-B Instrument laboratory thermometers are not approved for human use.


July 6, 2020
Image: Buchner Table-Top Funnels - SP Scienceware - Ask Lab Guy

Gravity or Vacuum Filtration for Buchner Tabletop Funnels

Dear Lab Guy, I have a question regarding the table-top Polyethylene Buchner Table-Top Funnel. Are those meant to be used for vacuum filtration or gravity filtration? If it's for vacuum, do you have a recommendation on the pump, hose (and/or a separate water container?) set up that can work with that funnel. Thanks! Li Y.
June 28, 2020
Image: Vaccuu-Pette/96 - SP Scienceware

Vaccu-Pette Not Sealing Well After Autoclaving

Dear Lab Guy, My customer is using the Reusable Autoclavable Vaccu-Pette 96 Tip Pi catalog no. 37876-0001 and has trouble getting a good seal after autoclaving this device. Do you have any tips for autoclaving? Margot S
June 22, 2020
Image: Vibrasorb Premium Vibration Damping Mounts - SP Scienceware

Building’s Vibrations Affect Sensitive Lab Instruments

Dear Lab Guy, Vibrations from our process equipment are being transmitted through a lab bench with an IR spectrophotometer. Vibrations were measured at 33 Hz both in horizontal and vertical orientation. Amplitude are 15.4 micron in the vertical and 30.5 microns in the horizontal direction. The spectrophotometer weighs 10 lbs. (4.5 Kg). Would the Vibrasorb Premium mount work for this application? Paul W
June 18, 2020
Image: Desi_Can_Reusable_Desiccant_Canister_SP-Scienceware_Ask-Lab-Guy

Recharging Desiccant Beads

Dear Lab Guy, After regenerating a cartridge desiccant in the oven at 300F for at least 3 hrs, where do you recommend keeping the hot cartridge until it cools down? I presume the cartridge should not be returned to the desiccator cabinet while hot. - Rea K.
June 17, 2020
Bel-Art SidEntry Glove Box - Ask Lab Guy

Can You Pull a Vacuum on a Glove Box?

Dear Lab Guy, We have a Scienceware sidentry clamping ring glove box (H500260000). Can we pull a vacuum in that glove box? We have a customer that needs an anaerobic environment to work in. - Derek D.