Bottle Top Dispenser: Choose the Right Size (From £169)
Updated: Sep 28
A bottle top dispenser is a laboratory liquid dispenser that screws onto a reagent bottle and delivers a set volume at each stroke. It's faster, safer and more repeatable than pouring or pipetting from the bottle.
Our bottle top dispensers cover 0.25 ml to 100 ml and start from £169.10.
0.25–2.5 ml | Low-volume reagent dispensing, analytical work |
0.5–5 ml | Routine reagent prep, teaching labs |
1–10 ml | Chemical analysis, reagent prep |
2.5–25 ml | QC labs, batch work |
5–50 ml | Bulk reagent dispensing |
10–100 ml | High-volume dispensing |
The short version
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Types: fixed, adjustable and automatic lab dispensers
There are three types of bottle top dispenser: fixed volume for repetitive QC work, adjustable volume for research labs using several volumes, and automatic (motorised) for high throughput.
Laboratory dispenser type | How it works | Best for |
|---|---|---|
Fixed volume | Same preset volume every stroke | QC testing, SOPs, repetitive dispensing |
Adjustable volume | Set the volume on the dispenser | Research labs, several reagents or volumes |
Automatic | Motorised dispensing | High throughput, pharma and industrial labs |
“ Choose the smallest range that covers your volume. Accuracy is best towards the top of the range. — LS Scientific |
Uses: what a lab liquid dispenser is for
A bottle top dispenser is used to dispense reagents, acids and solvents straight from the bottle for reagent preparation, titration and routine analysis.
Reagent preparation: dispensing buffers, acids and solvents straight from the bottle.
Titration and analysis: adding fixed volumes of reagent to each sample.
Low-volume reagent dispensing: the 0.25–2.5 ml range for small, precise additions.
QC and production labs: repeatable volumes across many samples.
Safety: no pouring, fewer spills and less contact with corrosive chemicals.
Choosing: a bottle top dispenser checklist
Choose a dispenser whose range puts your usual volume in the upper half, that is compatible with every reagent you'll dispense, and that fits your bottles.
Volume range: your usual volume in the upper half of the range.
Chemical resistance: check compatibility with every reagent you'll dispense.
Recirculation valve: primes without losing reagent.
Bottle thread adapters: make sure it fits your reagent bottles.
Calibration: check volume by weighing on an analytical balance.
Comparing brands? See our top 10 bottle top dispensers compared by price, accuracy and chemical resistance.
Related guides: Measuring smaller volumes? See types of micropipette, and which one your lab needs. Working with glass pipettes? See how to use a pipette filler, and which to buy.
FAQ: bottle top dispensers
What is a bottle top dispenser used for?
Dispensing accurate, repeatable volumes of reagents, acids, solvents and buffers directly from the reagent bottle.
What is a laboratory liquid dispenser?
Any device that delivers measured volumes of liquid in the lab. A bottle top dispenser is the most common type for reagents.
Can a bottle top dispenser handle sulphuric acid?
Yes, if it is built from chemically resistant materials. Check compatibility for each reagent.
What is the difference between fixed and adjustable dispensers?
Fixed dispensers deliver the same preset volume every time. Adjustable dispensers let you change the volume.
Which range is best for low-volume dispensing?
The 0.25–2.5 ml range suits small, precise reagent additions.
How much does a bottle top dispenser cost?
Our bottle top dispensers start from £169.10.
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