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The pad changes from blue to colorless in the absence of oxygen
Made from durable
Made of durable stainless steel that won't rust or corrode
Resistant to most commonly used laboratory reagents
Bel-Art Products Hydrometer Point Proof Certificate - BRT601140000 60 ct The pad changes from blueBel Art Products Hydrometer Point Proof Certificate This NIST Traceable Calibration Report is from H B Instrument's exclusive triple accredited registered calibration facility ISO IEC 17025: 2005 through A2LA States corrections to the readings that are traceable to NIST Hydrometer model must be specified at time of order Certification pricing does not include the price of the hydrometer Latex Free No UNSPSC 41113024
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