TopPette Single-Channel Fixed Volume Pipette

TopPette Single-Channel Fixed Volume Pipette

PRIMARY CLINICAL & DIAGNOSTIC USES

1. Consistent, Error‑Free Fixed Volume Transfer for Routine Clinical Assays
Primary Use: Provides a manual, single‑channel fixed volume pipette with a lightweight ergonomic body and a permanently set volume mechanism, used for the accurate and reproducible transfer of identical volumes of patient samples, reagents, calibrators, and controls in routine clinical assays where the same volume is used repeatedly. Available fixed volumes include 1 µL, 2 µL, 5 µL, 10 µL, 20 µL, 25 µL, 50 µL, 100 µL, 200 µL, 250 µL, 500 µL, 1000 µL, 2000 µL, 5000 µL, and 10000 µL.

How it helps: For the clinical laboratory scientist and medical technologist, the fixed volume design eliminates the risk of accidental volume adjustment between samples, reducing user error by removing the volume setting step entirely. The precision piston mechanism delivers systematic error as low as ±0.5% and random error as low as ±0.2% at mid‑range volumes. For the patient, this consistent, error‑free delivery ensures that every sample receives exactly the same volume of reagent or diluent, directly supporting reliable results for critical diagnostic tests such as blood typing, coagulation studies, and infectious disease screening.

2. Fully Autoclavable Lower Assembly for Aseptic Workflows
Primary Use: The lower portion of the pipette (tip cone and piston assembly) is constructed from autoclavable materials and can be steam‑sterilized at 121 °C for 20 minutes without disassembly on select models, and the entire pipette body is UV‑resistant for routine disinfection in sterile workflows.

How it helps: For the cell culture specialist, microbiology technologist, and molecular diagnostics scientist, the ability to autoclave the tip cone assembly eliminates cross‑contamination between sensitive cell lines, sterile reagents, or PCR reactions. The fixed volume design has fewer moving parts, making it more robust and easier to sterilize repeatedly. For the patient, rigorous sterilization of pipetting equipment ensures that specimens, cell‑based products, and diagnostic tests are not adulterated by contaminants, maintaining the safety and integrity of results and therapies.

3. High‑Throughput Repetitive Pipetting Without Adjustment Risk
Primary Use: Used for repetitive pipetting tasks where the same volume is dispensed hundreds or thousands of times per day, such as loading patient samples into multi‑well plates, adding a single reagent to multiple tubes, or performing serial aliquoting of controls and calibrators.

How it helps: For the high‑throughput laboratory technician, the fixed volume pipette eliminates the need to check and reset the volume between batches, saving time and reducing cognitive load during long shifts. The simplified workflow allows faster pipetting with fewer interruptions. For the patient, reduced handling steps and elimination of volume setting errors mean fewer repeat tests and faster turnaround times for results such as cardiac biomarkers, therapeutic drug levels, or prenatal screening markers.

4. Ergonomic Lightweight Design for Repetitive Strain Prevention
Primary Use: Features a lightweight, chemically resistant polymer body, a low‑force plunger, a relaxed finger rest, and a contoured handle designed for both right‑handed and left‑handed users, with a permanently marked or digitally displayed volume for immediate identification.

How it helps: For the laboratory staff member performing thousands of identical pipetting steps daily, the fixed volume pipette’s ergonomic design reduces the risk of repetitive strain injury (RSI) and hand fatigue. The smooth plunger action and low ejection force allow comfortable operation over extended shifts. The absence of a volume adjustment knob simplifies grip and reduces hand motion. For the patient, this fatigue‑reducing design contributes to consistent, error‑free sample handling throughout the day, supporting day‑to‑day reproducibility of diagnostic test results.

SECONDARY & SUPPORTIVE USES

1. ELISA plate loading with single reagent: Delivers the same volume of coating antibody, blocking buffer, enzyme conjugate, or substrate solution to every well of a 96‑well plate with exceptional consistency, ensuring uniform assay development across all wells, with the autoclavable lower assembly allowing for decontamination between runs.

2. qPCR master mix addition to tubes or plates: Adds a fixed volume of PCR master mix to each reaction tube or plate well, eliminating volume variability between reactions and ensuring reliable amplification efficiency across all samples, with the autoclavable tip cone critical for maintaining PCR‑grade sterility.

3. Blood bank pipetting for ABO/Rh typing: Dispenses consistent volumes of red blood cell suspensions, antisera, or reagent red cells for slide or tube agglutination tests, where precise volume ratios are critical for accurate blood group determination, with the fixed volume design eliminating operator setting errors.

4. Clinical chemistry reagent addition to analyzer cups: Transfers fixed volumes of patient serum, plasma, or urine from primary tubes to analyzer cups or microcuvettes for routine chemistry, electrolyte, and enzyme testing, supporting high‑throughput automated workflows with batch‑to‑batch consistency.

5. Serial dilution preparation for standards and controls: Accurately transfers the same volume of standard solution or control material from one tube to the next during serial dilution preparation for calibration curves in immunoassays and chemistry analyzers, with the fixed volume pipette providing unmatched reproducibility for each transfer step.

6. Cell culture media supplementation in multi‑well plates: Adds the same volume of serum, antibiotics, or growth factors to each well of a 24‑well or 96‑well plate under aseptic conditions, maintaining consistent culture conditions across all experimental conditions while the autoclavable design ensures sterility.

7. Protein quantification standard curve preparation: Delivers identical volumes of bovine serum albumin (BSA) standards from a stock solution into cuvettes or microplate wells for Bradford or BCA protein assays, with the fixed volume pipette providing the precision required for accurate standard curves.

8. DNA extraction binding buffer addition: Adds the same volume of lysis buffer, binding buffer, or wash solution to each spin column or well during manual nucleic acid extraction from clinical specimens, with the autoclavable piston and tip cone preventing cross‑contamination between patient samples.

9. Pharmaceutical quality control sample loading: Transfers fixed volumes of dissolution samples, QC standards, or purified fractions into HPLC vials or cuvettes where consistent injection volumes are critical for accurate quantification, supporting regulatory compliance in GMP environments.

10. Food safety pathogen detection: Dispenses identical volumes of food homogenate, enrichment broth, or PCR reagent into detection tubes or plates for Salmonella, Listeria, or E. coli testing, with the autoclavable pipette allowing for thorough decontamination between sample types.

11. Veterinary diagnostic sample aliquoting: Distributes fixed volumes of animal serum or plasma from large collection tubes into smaller aliquots for storage, shipping, or multiple assays, with the fixed volume design ensuring consistent aliquoting across all samples.

12. Academic teaching of fundamental pipetting techniques: Serves as an ideal training tool for students learning proper pipetting technique without the complexity of volume adjustment, allowing focus on plunger control and tip handling, with the durable, autoclavable construction standing up to repeated student use.