Category: BrandTech

**This post is applicable to the following BrandTech Dispensette models: Dispensette S, Dispensette S Organic, and Dispensette S Trace

Replacement Parts:

1. Discharge Tubes
   • Dispensette S, S Organic, & S Trace
     • The discharge tube is available in two variants, one with a recirculation valve and one without. An easy way to determine which variant you have is to look for the knob on top of the discharge tube.
2. Discharge Valves
   • Dispensette S, S Organic & S Trace
3. Filling Valves
   • Dispensette S, S Organic, & S Trace

Note: There are special tools to remove the discharge and filling valves. They are typically included when purchasing the unit.

Recommend Supplies:

1. Gloves
2. Pipette Tip or 6” Q Tip
3. Dispensette S, S Organic, S Trace, & Seripettor Pro Mounting Tool

Preliminary Note(s):
The Dispensette S, S Organic & S Trace models have discharge and filling valves threaded into the body of the bottletop, unlike the older models (Dispensette III & Dispensette Organic).

It is important to ensure the bottle top has been properly flushed with water prior to removing or replacing parts.

Discharge Tube Disassembly/Assembly:

To remove the discharge tube, unseat the clips by applying upward pressure to the outer gray shell.

After the clips are unseated, pull the discharge tube away from the bottletop dispenser body while applying light downward pressure on the tube.

Note: The Dispensette S, S Organic, and S Trace Analysis models share the same discharge tube connection. However, it is recommended to use the correct part for each model, as there are differences in their use cases and specifications.

To reseat the discharge tube, firmly insert the tube(s) into their respective openings on the bottletop body until they are fully seated.

While keeping the inward pressure, push down on the discharge tube assembly until it clicks into place.

Discharge & Filling Valve Replacement:

See the valve locations referenced in the pictures below:

Discharge Valve:

Filling Valve:

Note: The filling valve is more commonly clogged since it is positioned vertically, allowing solution to settle around the glass ball inside the valve. Refer to the instructions below to free the valve.

After locating the valve, use the mounting tool to remove it. Ensure the tool is fully seated, then unscrew the valve assembly by turning it counterclockwise.

Next secure the new valve in the mounting tool and turn the valve clockwise to tighten. Be careful not to overtight the valve as you can strip the body of the bottletop.

Resetting A Stuck Valve:

It is fairly common for a valve to become stuck. This can occur in either the filling valve or the discharge valve, but the process to free it is simple.

To free the valve, insert a 200 µL pipette tip or the wooden end of a 6-inch cotton swab (Q-Tip) into the valve opening. Apply gentle downward pressure to depress the glass ball inside the valve and release it.

This procedure resolves most issues with these bottletops. However, if the problem persists, the valve may need to be replaced.

Discharge Valve:

Filling Valve:

Note: This resetting procedure works for nearly all of the bottletop dispensers that BrandTech has made. The main difference is the older models do not have removeable valves.

Disclaimer: Any action you take using the information on this website is strictly at your own risk. The information herein does not constitute professional advice and is general in nature. We make no warranty that this information will meet your requirements, be safe, accurate, or error-free. Pipette Supplies, Inc. is not responsible for any errors or omissions, any results obtained from the use of this information, or any loss or damage arising out of the use of this information. This site is for educational purposes only.
Fair Use: Copyright Disclaimer under section 107 of the Copyright Act of 1976, allows for “fair use” for purposes such as comments, criticism, teaching, scholarship, news reporting, and research.
Fair use is permitted by copyright statute that might otherwise be infringing.

Recommended Supplies

1. Pair of gloves (not pictured)
2. Transferpette S Silicone Oil item# BT 705502 (for use with up to 1000uL volume sizes)
3. Box of Kim Wipes
4. Bottle of IPA 70%
5. Replacement parts

NOTE: These instructions are for Transferpette S single channel pipettes that are between 2uL-1000uL volume sizes. It’s recommended that a 4-5 place analytical balance be used to check the accuracy and precision performance after PM and 1 hour equilibration period is completed.

Transferpette S Disassembly and Preventative Maintenance

Step 1:

Rotate and unscrew the Transferpette S tip ejector sleeve from the pipette body. See Figure 1.0

Once fully unthreaded, the entire shaft assembly will detach from the pipette body, as shown in Figure 1.1.

Step 2:

Unscrew the blue colored coupling nut so that the tip ejector sleeve can be removed fully, thus exposing the lower shaft assembly. See Figure 1.2

Observation: Figure 1.3 shows the lower shaft assembly fully visible and separated from the tip ejector sleeve.

Step 3:

Unscrew the gray colored piston cap to expose the internal piston, piston spring, seal and seal retainer. Remove fully from the Transferpette S lower shaft assembly. Figure 1.4

Step 4:

Inspect the piston (1), piston spring (2), seal (3), and retainer (4). Figure 1.5. With a Kim wipe, clean and fully remove old lubricant from the piston, seal, and retainer.

Step 5:

Apply a light, but slightly visible amount of Transferpette S silicone oil onto the piston assembly. Figure 1.6

Step 5A:

Install a new seal assembly onto the retainer.

Transferpette S Reassembly

Step 6:

Attach seal retainer to the piston spring. Slide the seal, retainer, and spring back onto the piston with gray cap. Figure 1.8

Step 6A:

Inspect and replace shaft, tip ejector sleeve, piston if needed.

Step 7:

Slide the piston assembly back inside of the lower shaft assembly. Turn and tighten the gray piston cap until the piston assembly is fully secured inside of the shaft. Figure 1.9 and 1.9A

Step 8:

Locate the blue colored coupling nut. Insert the lower shaft assembly into the tip ejector sleeve. Figure 2.0

Rotate and turn blue colored coupling nut until the lower shaft is fully secured inside of the tip ejector sleeve. Figure 2.0A

Step 9:

Insert the liquid end assembly into the pipette body opening and rotate the tip ejector sleeve until it is tight with the body.

Step 10:

Once fully reassembled, allow the pipette to equilibrate for at least 60 minutes. After the equilibration period has passed verify accuracy and precision on a 4-5 place analytical balance.

Related Posts:

Transferpette S Parts Decoded
BrandTech Serial Number Format
BrandTech Transferpette Multichannel Nose Cone Part Numbers

Disclaimer: Any action you take using the information on this website is strictly at your own risk. The information herein does not constitute professional advice and is general in nature. We make no warranty that this information will meet your requirements, be safe, accurate, or error-free. Pipette Supplies, Inc. is not responsible for any errors or omissions, any results obtained from the use of this information, or any loss or damage arising out of the use of this information. This site is for educational purposes only.
Fair Use: Copyright Disclaimer under section 107 of the Copyright Act of 1976, allows for “fair use” for purposes such as comments, criticism, teaching, scholarship, news reporting, and research.
Fair use is permitted by copyright statute that might otherwise be infringing.

There have been many versions of the BrandTech Transferpette S over the years. Use this page to find the right parts for your pipette!

Shop Spare Parts Here:
Transferpette S Single Channel
Transferpette S Multichannel

To determine the year your pipette was manufactured, see BrandTech Serial Number Format.

Transferpette S Single Channel (pre-2020)

NOTE: If the pipette still has an original GLASS piston (older units), it must be replaced with a new composite piston and seal. Check with Pipette Supplies for the correct part number.

Transferpette S Single Channel (2020+)

NOTE: The pistons and seals did not change from the pre-2020 model. It is primarily the visible (outer shaft) components that are different.

2026 Update for Transferpette S 2mL Fixed Pipette:

Transferpette S Multichannel (pre-2020)

Evolution of nose cone part numbers:

RED FONT = Discontinued; If pipette has not been updated with new nose cones, ALL nose cones must be replaced.

*New nose cone design introduced in March 2023 is an alternative to 705614-705617 (see next section for pictures that illustrate the difference). Both options are available (until further notice) and compatible with the pipettes, BUT must have ALL nose cones of the same part number – cannot mix.

Transferpette S Multichannel (2020+)

NOTE: As of March 2023 (SN 23Cxxxxx), 5-50 μL to 30-300 μL BrandTech Transferpette S pipettes are manufactured with the newest design nose cone (see below); O-ring (705618) did NOT change

Pipettes can use EITHER new or old design, but must have ALL of one design – cannot mix

Illustration of old vs. new (from March 2023) nose cone design

Light grey = pre-2020 model
White = 2020+ model
New design is more rounded and slightly shorter. Position of O-ring is modified.
Materials and O-ring (705618) did NOT change.

Related Posts:

BrandTech Serial Number Format
BrandTech Transferpette Nose Cone Part Numbers
Transferpette Adjustment Knob Installation, Item # BT 9481

Disclaimer: Any action you take using the information on this website is strictly at your own risk. The information herein does not constitute professional advice and is general in nature. We make no warranty that this information will meet your requirements, be safe, accurate, or error-free. Pipette Supplies, Inc. is not responsible for any errors or omissions, any results obtained from the use of this information, or any loss or damage arising out of the use of this information. This site is for educational purposes only.
Fair Use: Copyright Disclaimer under section 107 of the Copyright Act of 1976, allows for “fair use” for purposes such as comments, criticism, teaching, scholarship, news reporting, and research.
Fair use is permitted by copyright statute that might otherwise be infringing.

The old BrandTech Transferpette (Mechanical) pipette was discontinued in 2015. Most replacement parts, including nose cones, are no longer available. You can find all available parts here: Transferpette Multichannel Mechanical

Multichannel Transferpettes with serial numbers – 01K (Jan 2012) or newer can use nose cones for Transferpette S:

**Note that unless the pipette has already been updated with the nose cones above, ALL nose cones must be changed out to the current style; for most pipettes, it usually makes more sense to update to a new multichannel Transferpette S.

Related Posts:

Transferpette Adjustment Knob Installation, Item # BT 9481
BrandTech Serial Number Format
BrandTech Transferpette S Parts Decoded

Disclaimer: Any action you take using the information on this website is strictly at your own risk. The information herein does not constitute professional advice and is general in nature. We make no warranty that this information will meet your requirements, be safe, accurate, or error-free. Pipette Supplies, Inc. is not responsible for any errors or omissions, any results obtained from the use of this information, or any loss or damage arising out of the use of this information. This site is for educational purposes only.
Fair Use: Copyright Disclaimer under section 107 of the Copyright Act of 1976, allows for “fair use” for purposes such as comments, criticism, teaching, scholarship, news reporting, and research.
Fair use is permitted by copyright statute that might otherwise be infringing.

If your pipette was manufactured prior to mid-November 2015:

First two digits are the MONTH of manufacture (i.e., 01-12)
Letter indicates YEAR of manufacture as shown below:
BrandTech Serial Number Example: 01A1234

A = 2003
B = 2004
C = 2005
D = 2006
E = 2007
F = 2008
G = 2009
H = 2010
J = 2011
K = 2012
L = 2013
M = 2014
N = 2015

If your pipette was manufactured after mid-November 2015:

First two digits are the YEAR of manufacture
Letter indicates MONTH of manufacture as shown below:
BrandTech Serial Number Example: 15L1234

A = January
B = February
C = March
D = April
E = May
F = June
G = July
H = August
J = September
K = October
L = November
M = December

Related Posts:
Transferpette Adjustment Knob Installation, Item # BT 9481
BrandTech Transferpette Nose Cone Part Numbers
BrandTech Transferpette S Parts Decoded
General Troubleshooting – Liquid Leak Test Testing & 12 Point Pipette Inspection

Disclaimer: Any action you take using the information on this website is strictly at your own risk. The information herein does not constitute professional advice and is general in nature. We make no warranty that this information will meet your requirements, be safe, accurate, or error-free. Pipette Supplies, Inc. is not responsible for any errors or omissions, any results obtained from the use of this information, or any loss or damage arising out of the use of this information. This site is for educational purposes only.
Fair Use: Copyright Disclaimer under section 107 of the Copyright Act of 1976, allows for “fair use” for purposes such as comments, criticism, teaching, scholarship, news reporting, and research.
Fair use is permitted by copyright statute that might otherwise be infringing.

Transferpette Adjustment Knob Installation:

Link to product page: BT 9481

Take micrometer window by sliding it (don’t unscrew it).  Then remove underneath gray cover.  On the other end of the micrometer, there is a locking system.  Leave the red clip on.  Remove the small metal piece while holding the micrometer numbers so they don’t move.  Slide out old Transferpette adjustment knob, insert new.

Disclaimer: Any action you take using the information on this website is strictly at your own risk. The information herein does not constitute professional advice and is general in nature. We make no warranty that this information will meet your requirements, be safe, accurate, or error-free. Pipette Supplies, Inc. is not responsible for any errors or omissions, any results obtained from the use of this information, or any loss or damage arising out of the use of this information. This site is for educational purposes only.
Fair Use: Copyright Disclaimer under section 107 of the Copyright Act of 1976, allows for “fair use” for purposes such as comments, criticism, teaching, scholarship, news reporting, and research.
Fair use is permitted by copyright statute that might otherwise be infringing.