Globe Scientific Snap-N-Rack™ for 20/21mm Tubes — 40-Place, Ships Flat, PP, Autoclavable

Globe Scientific Snap-N-Rack for 20/21mm Tubes (40-Place) serves the specialty tube diameter used in environmental testing, water quality analysis, industrial QC, and some research applications. Standard 20mm glass test tubes are the workhorse of environmental water labs performing BOD, COD, and nutrient analysis — each sample in its own tube, often in batches of 20-30 per sampling event. The 40-place capacity handles a full field sampling batch with positions to spare.

Environmental and Specialty Applications

Water quality labs collect field samples in 20mm glass tubes and process them in batches corresponding to sampling sites. The alphanumeric markings on this rack correspond directly to site logs — position A1 for site 1, A2 for site 2, and so on. This 1:1 mapping between rack position and field log reduces the transcription errors that occur when tubes are processed from unmarked containers. The flat-shipping format makes this rack practical for field offices that receive supplies by mail.

Specifications

• Tube Diameter: 20/21mm

• Capacity: 40-place

• Material: PP, autoclavable

• Ships Flat: Snap-together

• Colors: White, Blue, Yellow, Red