Quick answer: A dropper is designed for controlled dispensing but usually does not guarantee an exact volume per drop. A graduated pipette has measurement marks for approximate or specified liquid volumes. Volumetric pipettes deliver one fixed calibrated volume, while transfer or Pasteur pipettes are mainly for moving liquid rather than precise measurement.

Buyer note: Choose by required accuracy, liquid compatibility, working volume, sterility, bottle-neck fit, and whether the component is disposable or reusable. Always verify the supplier’s tolerance and material specification.

Graduated Pipettes: Uses, Types, and Applications

Graduated Pipettes have many uses. Not only can they be found in the laboratory—nowadays, they can be used domestically for many types of liquids, including eye drops, incense, essential oils, CBD tinctures, and more. What is a graduated pipette vs a dropper? These two go hand-in-hand, for they are both interchangeable terms, with droppers allowing for controlled dispensing. With that said, a pipette, also called a pipet, pipettor, or chemical dropper is a laboratory instrument used to transport a measured volume of liquid. It comes in several designs for various purposes with differing levels of accuracy and precision.

Glass and Plastic Droppers

The original pipette was made of glass. It is more commonly used in chemistry with aqueous solutions. There are two types of these—the volumetric pipette, which typically has a large bulb and is calibrated for a single volume, and Mohr pipettes, typically straight-walled and graduated for different volumes.

However, today, graduated pipettes come in plastic as well. They are more commonly used in both biology and chemistry. These graduated pipettes are also designed for aqueous solutions but not recommended for use with organic solvents which may dissolve the plastic.

Both glass and plastic graduated pipettes are sterilized and plugged with a polypropylene bulb at the open end, blocking contamination from the rest of the tube. They also both have been widely adapted to be used not only for science and medicinal purposes but also for domestic purposes too, as aforementioned.

Graduated pipettes have become the best scientific tool in both the medical field and in the household. With medical professionals administering medicine using the precise amount, and household parents utilizing graduated pipettes to measure products such as essential oils, pet and child medicine.

The Five Grades of Pipettes

Besides the known materials for pipettes, there are five grades of pipettes—disposable/transfer, graduated/serological, single-channel, multichannel, and repeat pipette. Knowing these and how to use them will ensure that whoever uses the pipette and whatever liquid the pipette is used for will provide the most precise results with the smallest margin of error.

Disposable/Transfer Grade

The disposable/transfer grade is the most basic type of pipette, being used for rough measurements only. This type of dropper is only good for single use.

It is important to follow the standard pipetting technique when using a disposable pipette, which consists of:

1. Grabbing a new one.
2. Aspirating the liquid at a 90-degree angle.
3. Dispensing at a 45-degree angle.
4. Transferring the liquid to make sure it is fully dispensed.

Graduated/Serological Grade

The graduated/serological grade is typically used when the final volume of a liquid is calculated by the difference of the liquid level before and after it is dispensed. Think of a burette, a long, graduated tube.

This type of pipette’s standard technique is more technical and consists of:

1. Holding the pipette in the solution (do not touch the bottom).
2. Squeezing the bulb.
3. Holding one’s forefinger on the top of the pipette to control volume aspiration.
4. Subtracting the amount needed into a separate beaker.
5. Measuring the solution from the bottom of the meniscus.
6. Subtracting the needed volume from the initial volume in order to obtain the desired amount of liquid.

Single-Channel Grade

The single-channel grade pipette usually has an air-displacement design that produces accurate measurements. It is a non-disposable instrument with a disposable tip.

This type of pipette uses two common techniques—forward and reverse.

Forward technique

The forward technique is the most common:

1. Press the bulb to first stop and slightly submerge the tip of the pipette into the liquid.
2. Aspirate the measured volume by releasing the bulb slowly.
3. Place the tip against the side of the receptacle.
4. Gently and carefully press the bulb in order to dispense the liquid.

Reverse technique

As for the reverse technique, this is good for viscous solutions, which will minimize the interference of air bubbles.

To use this technique:

1. Press the bulb all the way down.
2. Submerge the pipette into the liquid.
3. Slowly release the bulb.
4. Aspirate the liquid into the tip.
5. Place the tip against the wall of the receptacle.
6. Press the bulb to the first stop.
7. Remove the tip from the receptacle.

This will allow the user to have a sample of liquid that remains in the tip of the pipette that isn’t a part of the measurement.

Multi-Channel Grade

The multi-channel grade is similar to that of a single-channel pipette. However, it takes more than one tip of liquid at a time. The technique is similar to the single grade, however, the outcome is much more different.

The liquid is able to be aspirated at the same time into multiple channels, ensuring that all liquid levels are equal.

Repeat Pipette Dispenser

The repeat pipette dispenser is able to allocate a specific volume into multiple receptacles without having to be divided into multiple dispenses, saving time and effort.

The main difference between this type of pipette and the others is that it has a filling and dispensing lever instead of a bulb.

To use this type of pipette:

1. Slide the filling lever down to the furthest point.
2. Raise the locking clamp.
3. Insert the tip into the barrel and close the lever.
4. Immerse the tip into the liquid at a 90-degree angle.
5. Carefully slide the filling lever upward to fill the tip completely.
6. Prep the tip by disposing the liquid from the first dispense.
7. The repeat pipette is ready to go.

Where to Find These Types of Pipettes

Graduated Pipettes are very useful for controlling the number of substances and liquids that are being dispensed. Not only do they help in accuracy and precision, but they also save time and are efficient to use. They also are essential in ensuring that liquid handling is sterile and safe.

The single-channel, multi-channel, and repeat dispenser-grade graduated pipettes, are the ones most typically used for scientific and medicinal purposes. These can be used to store and transfer chemicals, lab samples, medicines, and solvents.

They can be found at industrial, clinical, and educational laboratory supply stores. As for the basic disposable/transfer and graduated/serological grade pipettes, these can be found right here at FH Packaging.

Check out our new medical-grade graduated glass droppers, making them child resistant with a seal that makes it challenging for children to open, high quality with medical-grade printing and the ability to hold up to the most corrosive solutions, and friendly for everyday use.

You can also view an in-depth blog on Labmates' website explaining more Graduated Pipettes Types.

FH Packaging Droppers and Graduated Pipettes

Need Precision Lab & Cosmetic Droppers? Explore our complete catalog of wholesale plastic & glass droppers and dropper bottle assemblies.

Featured Best-Selling Glass Bottle: Explore our 2 oz (60ml) Amber Boston Round Glass Bottle with precision cap assembly.

Quick Buyer Comparison

Bottle dropper: Best for controlled consumer dispensing; drop size varies with liquid, tip, angle, and temperature.

Transfer or Pasteur pipette: Best for moving or roughly portioning liquid; not intended for high-accuracy dosing.

Graduated pipette: Best when volume markings are needed; confirm graduation tolerance and reading method.

Volumetric pipette: Best for one calibrated volume in laboratory work; generally not a packaging closure.

Serological or Mohr pipette: Best for measured laboratory transfers; technique and calibration type affect the delivered volume.

Frequently Asked Questions

Is a dropper the same as a graduated pipette?

Not exactly. Both move or dispense liquids, but a standard dropper may have no calibrated markings, while a graduated pipette is marked to indicate volume.

Are graduated marks always exact?

No. Accuracy depends on the product’s stated tolerance, calibration, reading technique, and whether it is designed to contain or deliver the marked volume.

Should I choose glass or plastic?

Choose based on breakage risk, cost, sterilization method, and chemical compatibility. Confirm the exact resin or glass type against the formula.

Can one dropper fit every bottle?

No. Match the neck finish, closure thread, pipette length, bulb, wiper or orifice, and required seal before ordering.