Lab Dispensers

Select a dispenser based on required volume range and accuracy, chemical compatibility of wetted materials (glass, PTFE, polypropylene), dispensing mechanism (piston, peristaltic, or bottle-top), and whether you need single-channel or multi-channel operation for throughput

Accuracy and precision vary by model and volume; small-volume dispensers typically offer higher relative accuracy (±0.5–2%) while larger volumes may have wider tolerances. Check manufacturer specifications for percent error and reproducibility for the specific volume range you need

Budget options are commonly available under $50 and typically compromise on features such as automated dispensing, chemical-resistant materials, fine volume adjustment, or long-term calibration stability; they can be suitable for occasional or low-precision tasks

Regular cleaning of wetted parts after use, periodic inspection of seals and O-rings, and routine calibration against a known standard or gravimetric test are recommended; follow the manufacturer's maintenance schedule for frequency

Choose dispensers with wetted materials compatible with your reagents—PTFE and glass offer broad chemical resistance, polypropylene is good for aqueous solutions, and stainless steel can handle many solvents but may corrode with strong acids or bases

Viscous liquids and volatile solvents may require specialized dispensers such as positive-displacement or syringe-type models and materials rated for solvent exposure; peristaltic pumps can handle viscosity but may introduce pulsation and have tubing compatibility limits

Ergonomics helps reduce user fatigue for repetitive tasks—look for comfortable grips, easy volume adjustment, and lightweight construction; safety features include splash guards, lockable volume settings, and chemical-resistant materials to minimize exposure risk