Welcome to our comprehensive guide on desiccators, vital tools in any laboratory setting for preserving samples by creating controlled, moisture-free environments. Whether you're working with sensitive chemicals, biological specimens, or electronics, these airtight chambers ensure dryness and integrity, preventing contamination and degradation. Explore our selection of 15+ products, from compact vacuum desiccators to spacious cabinets, perfect for researchers, scientists, and lab technicians seeking reliable evaporation and drying solutions.
What Are Desiccators and Why Do You Need Them?
Desiccators are sealed containers designed to hold desiccants like silica gel or phosphorus pentoxide, maintaining low humidity levels inside. They come in various forms: traditional glass desiccators with porcelain plates, vacuum desiccators for enhanced drying under negative pressure, and modern auto-desiccators with built-in humidity controls. In labs, they protect hygroscopic materials, dry samples post-experiment, and store moisture-sensitive items long-term. As part of broader Lab Instruments & Equipment, desiccators streamline workflows and ensure experimental accuracy.
Key Features to Consider When Buying Desiccators
Selecting the right desiccator depends on your lab's needs. Look for these essential attributes:
- Material Durability: Polycarbonate or polypropylene for transparency and chemical resistance; borosilicate glass for high-heat tolerance.
- Seal Quality: Silicone O-rings or greased stopcocks for airtight performance, especially in vacuum models holding up to 740mm Hg.
- Capacity and Design: From 0.09 cu ft compact units to 4.0 cu ft cabinets; flat dome tops or horizontal styles for space efficiency.
- Autoclavability: Many models withstand sterilization, ideal for sterile environments.
- Additional Features: Vacuum ports, PTFE plugs, or automatic dehumidifiers for hands-free operation.
Within Evaporation & Drying Equipment, prioritize models matching your volume and vacuum requirements to optimize sample protection.
Popular Types of Desiccators in Our Collection
Our category features diverse options. Vacuum desiccators, like the SP Bel-Art “Space Saver” with its clear polypropylene bottom and airtight dome, excel in compact lab storage. For larger needs, SP Bel-Art's Secador Vertical Auto-Desiccator offers 1.9 cu ft with 120V humidity control—explore more from SP Bel-Art for innovative designs.
Glass desiccators from StonyLabScientific, such as the 9.4-inch model with knob cover and porcelain plate, provide classic visibility and robustness for research. Eisco Labs' 20cm vacuum version with silicone O-ring and PTFE components ensures reliable 24-hour vacuum retention—check Eisco Labs for budget-friendly precision.
Cabinet-style units, including Dry-Keeper horizontal PVC models, suit bulk storage. Rechargeable desiccant packs complement standalone desiccators for portable moisture control in bins or electronics.
For related tools, browse our Desiccators & Accessories or broader Lab & Scientific Products.
Common Use Cases for Desiccators
Labs use desiccators for drying precipitates after filtration, storing deliquescent salts, or protecting NMR samples. In pharma and biotech, they safeguard reagents; in materials science, they prevent oxidation. Vacuum models accelerate drying, while auto-cabinets maintain steady RH levels automatically. Thickened PC versions like MACCXScientific's handle inert gas purging for advanced applications.
Frequently Asked Questions
What is the difference between vacuum and standard desiccators?
Vacuum desiccators apply negative pressure to remove moisture faster, ideal for volatile samples, while standard ones rely on desiccants alone for passive drying.
Are desiccators autoclavable?
Many polycarbonate and polypropylene models are autoclavable up to 121°C, but always check specs—glass ones tolerate higher temps with care.
How do I choose the right size?
Match capacity to sample volume: small for Petri dishes (e.g., 7.1-inch), large cabinets for multiple trays. Consider bench space too.
Can desiccators hold vacuum indefinitely?
High-quality models like Eisco's maintain 740mm Hg for 24+ hours; regular checks ensure seals remain intact.
What desiccants work best?
Silica gel for general use (reusable when color changes), molecular sieves for ultra-low humidity, or indicating types for easy monitoring.
