A compact, affordable, and precise liquid filling solution for lab, field, and small-batch industrial use.
Current liquid filling methods such as funnels, syringes, and pipettes are often slow, inconsistent, and prone to spills. While large-scale filling machines address these shortcomings, they are expensive and impractical for portable use. The Portable Manual Liquid Filling Machine bridges this gap, combining efficiency, precision, affordability, and mobility into a single compact, handheld device suited for laboratory, field, and small-batch industrial applications.
1. Fill → Remove top fill cap, pour liquid into chamber, replace cap
2. Position → Place container under nozzle; use side handle for stability
3. Dispense → Push plunger to release liquid through nozzle
4. Clean → Disassemble, rinse, and dry all parts after use
| Exterior View | Internal Components |
|---|---|
 |
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| Feature | Details |
|---|---|
| Quick Operation | One-handed plunger action · accurate from 10 mL to 100 mL |
| Interchangeable Nozzles | Snap-on options for test tubes, bottles, or vials |
| Easy Cleaning | All fluid-contact parts snap apart for maintenance |
| Cost Efficiency | Target price under $100/unit using common, durable materials |
| Component | Material | Rationale |
|---|---|---|
| Housing & Reservoir | Polycarbonate | Impact resistant, transparent for liquid level visibility, and chemically compatible with most lab liquids |
| Frame & Lever | ABS | Lightweight, rigid, and cost-effective for structural parts that don't contact liquid |
| Nozzles | Polypropylene or 316L Stainless Steel | Chemically inert and autoclavable; stainless steel preferred for harsh chemicals or repeated sterilization |
| Seals & Tubing | Silicone | Flexible, non-toxic, and temperature resistant — standard for lab-grade seals and tubing |
- Academic Researchers & Lab Technicians — precise, small-volume liquid handling in space-limited environments
- Field Scientists & Environmental Technicians — portable design suited for mobile sampling in rugged conditions
- Small-Batch Manufacturers — affordable filling solution for food, cosmetics, and beverage QA or boutique production
- Healthcare & Veterinary Professionals — dosing and sample preparation for clinics or on-site visits
Before use:
- Inspect all seals for wear or damage
- Do not exceed maximum fill capacity
- Stop immediately if any part appears damaged or misaligned
After use:
- Clean all fluid-contact parts thoroughly
- Check alignment of guide rods
- Replace worn seals and fasteners as needed
Existing machines are large, expensive, and designed for industrial-scale operations, making them impractical for researchers, field workers, and small producers. This device combines portability and precision, offering a hygienic, flexible, and affordable alternative for anyone who needs reliable liquid filling on a small scale.
Ryan Kelly
Built as part of the Build Fellowship
