JOANLAB bottle-top dispenser · DA series
Bottle-top dispensers for reagent bottles, from 0.5 to 60 mL, with a safety valve, in standard and Pro versions.
- Five ranges, from 0.5 to 60 mL
- Tolerance stated at the test volume, half the nominal
- Pro version for strong acids and alkalis
- Safety valve and cap against splashing
Summary datasheet
| Models and ranges | Five ranges, each in a standard and a Pro version: 0.5-2.5 mL (DA-2.5ML and DA-2.5Pro), 1-5 mL (DA-5ML and DA-5Pro), 2-10 mL (DA-10ML and DA-10Pro), 5-30 mL (DA-30ML and DA-30Pro) and 10-60 mL (DA-60ML and DA-60Pro) |
| Setting increment | 0.05 mL (DA-2.5ML), 0.1 (DA-5ML), 0.2 (DA-10ML), 0.5 (DA-30ML) and 1 mL (DA-60ML) |
| Stated systematic error | At the manufacturer's test volume, which is half the nominal volume: 12.5 µL at 1.25 mL (DA-2.5ML), 25 µL at 2.5 mL (DA-5ML), 50 µL at 5 mL (DA-10ML), 150 µL at 15 mL (DA-30ML) and 300 µL at 30 mL (DA-60ML); that is 1% of the test volume across all five sizes. The same values for the Pro version |
| Stated random error | At the manufacturer's test volume, which is half the nominal volume: 2.5 µL (DA-2.5ML), 5 (DA-5ML), 10 (DA-10ML), 30 (DA-30ML) and 60 µL (DA-60ML); that is 0.2% of the test volume across all five sizes. The same values for the Pro version |
| Thread adapters | To be confirmed with the supplier |
| Chemical resistance | Standard version for weak acids and alkalis, and Pro version for strong ones; the Pro version exists in all five capacities (DA-2.5Pro, DA-5Pro, DA-10Pro, DA-30Pro and DA-60Pro) |
| Safety | Safety valve and cap against splashing and leakage |
| Sterilization | Not stated by the manufacturer; to be confirmed |
| Availability | Import to order / to be confirmed |
Five sizes chaining from 0.5 to 60 mL
The ranges overlap —0.5-2.5, 1-5, 2-10, 5-30 and 10-60 mL—, so the usual volume tends to fit two sizes; the better one keeps it closer to its top. The stated error scales with size and is proportionally the same across all five: 1% systematic and 0.2% random at the test volume.
The dispenser has a safety valve and mounts directly on the reagent bottle. The stated chemical resistance is not the same across the family: it depends on the version.
Standard or Pro: same volumetric table, different chemical resistance
The catalog publishes identical ranges, increments and errors for both versions; the difference the manufacturer states is chemical resistance. The five standard models, DA-2.5ML to DA-60ML, are stated to be resistant to weak acids and alkalis, and the five Pro models, DA-2.5Pro to DA-60Pro, to strong acids and alkalis. If the bottle will hold strong acids or alkalis, the version stated for that is the Pro; the specific reagent is confirmed in the quote.