Serial Diluters by Inlabtec – Efficient, Standardised Microbiological Dilution Systems
Inlabtec Serial Diluters automate the preparation of decimal serial dilutions using sterile, low-material Serial Dilution Bags instead of conventional tubes. Designed for microbiological testing laboratories, the systems reduce manual preparation work, simplify dilution workflows and support consistent, ISO-compatible dilution processes.
The Inlabtec Serial Dilution System combines ready-to-use Serial Dilution Bags with automated dispensing and integrated mixing. Samples are pipetted into the dilution bag and homogenised by the Serial Diluter, enabling fast, standardised and reliable sample dilution without changing established laboratory procedures.
The system is compact and easy to integrate into existing laboratory workflows, requiring minimal bench space comparable to a vortex mixer and tube rack.
Choose the model that best fits your laboratory’s sample throughput, workflow and budget. As a practical guide, the Serial Diluter UA is ideal for laboratories processing up to around 50 samples per day, while the fully automated Serial Diluter UC is recommended from around 50 samples per day or more.
Serial Diluter UC: The Automatic
The Serial Diluter UC is Inlabtec’s fully automated solution for serial dilution workflows. It combines the patented bag-based dilution system with intuitive user guidance, automated filling and integrated mixing.
Illuminated bag openings guide the user through sample addition and sample retrieval. Sensors detect key workflow steps and control the automated mixing and dispensing sequence. This reduces manual handling and supports a consistent dilution process, especially in laboratories with higher daily sample numbers.
The Serial Diluter UC is designed for laboratories that require maximum automation, high workflow efficiency and reliable handling of routine serial dilutions.
Watch: Serial Diluter UC in Action (Video Demos)
 | New Serial Diluter UC: Experience effortless efficiency with its precise sample detection and seamless mixing, automatically filling the next bag upon completing sample addition. Experience effortless efficiency! | |
 | New Serial Diluter UC: This video shows the creation of a 4-stage dilution series and the inoculation of 8 plates as a example of the efficiency, simplicity, and convenience offered by the new Serial Diluter UC. | |
 | New Serial Diluter UC: MixWhilePipet mode offers further time savings by parallelizing sample addition, mixing and bag filling for those who prepare the complete dilution series before starting with the inoculation of the plates. |
Key Features of the Serial Diluter UC
- Fully automated serial dilution workflow using sterile Inlabtec Serial Dilution Bags.
- Ideal for laboratories processing around 50 or more samples per day.
- Automated filling and integrated mixing for consistent dilution steps.
- Illuminated bag openings guide the user through sample addition and retrieval.
- Sensor-controlled workflow supports reliable detection of bags, pipette position and sample addition.
- Reduced operator workload and training requirements.
- User-friendly operation reduces manual handling, tube preparation and repetitive vortexing.
- Compact design requiring minimal bench space.
- Suitable for routine microbiological laboratories with regular or high sample throughput.
- Used in ISO/IEC 17025 accredited laboratories for routine microbiological testing.
Benefits of Using the Serial Diluter UC
- Higher workflow efficiency: Automated filling, mixing and user guidance reduce repetitive manual steps and simplify routine serial dilution work.
- Consistent dilution process: Standardised bag format, automated dispensing and integrated mixing support reproducible dilution steps from sample to sample.
- Reduced preparation effort: Sterile single-use bags eliminate washing, autoclaving, filling and organisation of prepared tubes before use.
- User-friendly operation: Illuminated bag openings and guided workflow make the dilution process clear and easy to follow.
- Designed for higher throughput: The UC is especially suitable for laboratories processing serial dilutions regularly and where automation has a clear impact on daily efficiency.
Technical Specifications – Serial Diluter UC
Quotation & What’s Included – Serial Diluter UC
Request your quotation.
Inlabtec Serial Diluter systems and consumables are quoted individually. For customers outside Switzerland, quotations are usually handled by our local distribution partners to include country-specific logistics, import duties, service, and support.
| Part. No. | Description | Quantity | Price |
| 160000 | Serial Diluter UC complete incl. 1 x Tubing Set 100010, 1 x Dispensing Nozzle 140011, 1 x Connector Cap GL45 cpl 100020 , 1 x Bag Shell 100030, 1 x Serial Dilution Bags 100101, 1 x Power Adapter  | 1 | Request quote |
| 160002 | Bagholder UC, converts a Serial Diluter UA into a Serial Diluter UC, incl. 1x Software upgrade, 1 x Power Adapter | 1 | Request quote |
Accessories | |||
| Part. No. | Description | Quantity | Price |
| 100010 | Tubing Set to Serial Diluter incl. two caps for pipette connection and intake hose, fully autoclavable | 1 | Request quote |
| 140011 | Dispensing Nozzle UA to Serial Diluter UA/ UC, PEEK and stainless steel, fully autoclavable | 1 | Request quote |
| 100013 | Set of Caps and Pipette Connections, 5 x silicone caps for Connector Cap GL 45 cpl and intake hose of Tubing Set, 2 x pipette connections for Tubing Set incl. 2 x PVDF caps. | 1 | Request quote |
| 100014 | Syringe Filter, Ø25 mm, to Serial Diluter and Connector Cap GL 45, PTFE membrane, hydrophobic, about eight times autoclavable | 1 | Request quote |
| 100015 | Adhesion Gripper to Bag Holder, 4 mm x 370 mm, self-adhesive, with mounting instructions, set of 2 pieces | 1 | Request quote |
| 100020 | Connector Cap GL 45 cpl, for the connection of diluent in GL 45 bottles to the Serial Diluter, with PTFE sterile filter 0.2 µm, Ø 25 mm for sterile pressure compensation, with 2 hose connections for 3 mm ID (inner diameter) in polyvinylidene fluoride (PVDF) , incl. 300 mm intake silicone hose, silicone cap, fully autoclavable | 1 | Request quote |
| 100021 | Tubing Adapter, set of three, for the connection of diluent with supply of ID (inner diameter) 3 - 7 mm, incl. 60 mm silicone hose ID 6 mm, autoclavable | 1 | Request quote |
| 100030 | Bagshell, for storage of filled Serial Dilution Bags, PMMA | 1 | Request quote |
| 100031 | Bagshell Rocker, for tilting a Bagshell for sampling out of Homogenizer Bags, PMMA anthracite | 1 | Request quote |
| 100032 | Bagshell Panel, for sampling out of Serial Dilution Bags in a Bagshell, PMMA (Picture show a Bagshell and a Bagshell Panel) | 1 | Request quote |
Serial Diluter UA: The Semi-Automatic
The Serial Diluter UA is the semi-automatic Inlabtec solution for efficient and standardised serial dilution. It combines sterile Serial Dilution Bags with integrated mixing and controlled diluent dispensing, while keeping the workflow simple and easy to operate.
Mixing and filling of the next dilution bag are triggered by moving the dosing lever to the right. After a short familiarisation period, users can prepare dilution series quickly and consistently without tube handling, vortexing, washing or autoclaving.
The UA is well suited for laboratories that want to simplify serial dilution workflows with a robust and cost-effective automation solution, especially at lower to moderate sample throughput.
Watch: Serial Diluter UA Demonstration Videos
Key Features of the Serial Diluter UA
- Semi-automatic serial dilution workflow using sterile Inlabtec Serial Dilution Bags.
- Ideal for laboratories processing up to around 50 samples per day.
- Mixing and filling are triggered by a simple movement of the dosing lever.
- Integrated mixing supports consistent dilution steps without separate vortexing.
- Ready-to-use bags eliminate tube washing, autoclaving and manual filling before use.
- Works with all common microbiological diluents.
- Designed for ISO 6887-1 decimal dilutions using 1 ml sample + 9 ml diluent.
- Compatible with almost all common pipette types.
- Simple and robust operation with a short familiarisation period.
- Compact design requiring minimal bench space.
- Cost-effective entry into automated serial dilution for routine microbiological laboratories.
- Used in ISO/IEC 17025 accredited laboratories for routine microbiological testing.
Advantages of Semi-Automated Dilution with UA
- Simple operation: The lever-based workflow is easy to learn and allows users to prepare serial dilutions efficiently after a short familiarisation period.
- Reduced manual work: Tube handling, vortexing, washing, sterilisation and preparation of filled tubes are no longer required.
- Consistent dilution process: Sterile bags, controlled dispensing and integrated mixing support reproducible dilution steps from sample to sample.
- Cost-effective automation: The UA offers a practical entry into automated serial dilution for laboratories that do not require the full automation level of the Serial Diluter UC.
- Flexible routine use: The system works with common microbiological diluents and almost all standard pipette types, making it easy to integrate into existing laboratory procedures.
- Suitable for routine testing: The system is designed for microbiological laboratories that perform serial dilutions regularly and want to improve workflow efficiency without introducing unnecessary complexity.
Technical Specifications – Serial Diluter UA
Quotation & What’s Included – Serial Diluter UA
Request your quotation.
Inlabtec Serial Diluter systems and consumables are quoted individually. For customers outside Switzerland, quotations are usually handled by our local distribution partners to include country-specific logistics, import duties, service, and support.
Accessories | |||
| Part. No. | Description | Quantity | Price |
| 100010 | Tubing Set to Serial Diluter incl. two caps for pipette connection and intake hose, fully autoclavable | 1 | Request quote |
| 140011 | Dispensing Nozzle UA to Serial Diluter UA, PEEK and stainless steel, fully autoclavable | 1 | Request quote |
| 150011 | Dispensing Nozzle UA12 to Serial Diluter UA12, PEEK and stainless steel, fully autoclavable | 1 | Request quote |
| 100013 | Set of Caps and Pipette Connections, 5 x silicone caps for Connector Cap GL 45 cpl and intake hose of Tubing Set, 2 x pipette connections for Tubing Set incl. 2 x PVDF caps. | 1 | Request quote |
| 100014 | Syringe Filter, Ø25 mm, to Serial Diluter and Connector Cap GL 45, PTFE membrane, hydrophobic, about eight times autoclavable | 1 | Request quote |
| 100015 | Adhesion Gripper to Bag Holder, 4 mm x 370 mm, self-adhesive, with mounting instructions, set of 2 pieces | 1 | Request quote |
| 100017 | Tubing Set Twin, to Serial Diluter TA & UA, to connect two diluents, incl. 2x clamps, two caps for pipette connection and intake hose, fully autoclavable | 1 | Request quote |
| 100020 | Connector Cap GL 45 cpl, for the connection of diluent in GL 45 bottles to the Serial Diluter, with PTFE sterile filter 0.2 µm, Ø 25 mm for sterile pressure compensation, with 2 hose connections for 3 mm ID (inner diameter) in polyvinylidene fluoride (PVDF) , incl. 300 mm intake silicone hose, silicone cap, fully autoclavable | 1 | Request quote |
| 100021 | Tubing Adapter, set of three, for the connection of diluent with supply of ID (inner diameter) 3 - 7 mm, incl. 60 mm silicone hose ID 6 mm, autoclavable | 1 | Request quote |
| 100030 | Bagshell, for storage of filled Serial Dilution Bags, PMMA | 1 | Request quote |
| 100031 | Bagshell Rocker, for tilting a Bagshell for sampling out of Homogenizer Bags, PMMA anthracite | 1 | Request quote |
| 100032 | Bagshell Panel, for sampling out of Serial Dilution Bags in a Bagshell, PMMA (Picture show a Bagshell and a Bagshell Panel) | 1 | Request quote |
«Unthinkable that test tubes are used again in our laboratory for dilutions. »
Alexandra Dostal, Cantonal Laboratory of Thurgau, Frauenfeld, Switzerland
«The Serial Diluter works perfectly and saves us a lot of work. We can no more imagine a step backwards to the dilution tubes. »
Rainer Hofmann, SGS INSTITUT FRESENIUS GMBH, Freiburg, Germany