Quartz Flow Colorimeter Cell

In flow cytometry, droplet microfluidics, and online water quality fluorescence detection, the colorimeter cell is the core consumable that determines the stability of sample flow and the accuracy of optical signals. Luverre's quartz "flow colorimeter cell" is specifically designed for continuous flow detection scenarios. It is made by integrating high-purity fused quartz or synthetic quartz in one piece, without adhesives or dead corners. It has excellent optical transmittance (≥90% in the ultraviolet range) and extremely low background fluorescence. More importantly, we break the "standard part" limitation and support full customization of optical path, flow channel shape, inlet and outlet liquid port types, and external dimensions. This helps instrument manufacturers and research users obtain flow cells that truly match their equipment, no longer forced to accommodate the common specifications available on the market.

Common Questions (FAQ)

Q1: What is the core difference between quartz flow cytometer cuvettes and ordinary cuvettes?

A: Ordinary cuvettes are open and used for static placement, while flow cytometer cuvettes have closed channels and liquid inlet/outlet interfaces, designed for continuous sample flow detection. Our products adopt an integrated quartz structure, which is pressure-resistant, corrosion-resistant, and has no glue leakage. They can be directly integrated into flow cytometers, particle size analyzers, or online water quality monitoring systems.

Q2: Can non-square flow channels be customized, such as circular or flat rectangular ones?

A: Absolutely. We support square, circular, elliptical, D-shaped, and flat rectangular (such as 0.2mm×2mm) flow channels. For rare cell or microsphere detection, extremely narrow flat flow channels can be customized for single-column passage to improve counting accuracy.

Q3: What are the available options for the liquid inlet/outlet interfaces of the cuvettes?

A: We offer various standard interfaces: 1/4-28 UNF, M6, M8 threads, Lug male/female connectors, snap-on flexible tube connectors, and smooth open holes without interfaces (users can attach their own tubing). The interface positions can be on the side, bottom, or top, and single-channel or double-channel are available.

Q4: Can it be compatible with mainstream flow cytometers such as BD, Beckman, Cytek, etc.?

A: Yes. You only need to provide the original cuvettes or the instrument model, and we can precisely map and customize replacement parts with fully compatible dimensions, optical paths, and interfaces. Many cuvettes are expensive and have long delivery times of several weeks. Our custom parts usually save 40%-60% of the cost and have comparable or better quality.

User core requirements and solutions

- Need for continuous sample injection without bubbles → Optimize the flow channel corners and inlet/outlet angles, combined with exhaust design to eliminate bubble interference.

- Need for matching specific instrument interface → Customized according to the diagram, ready to install and use immediately, without the need to modify the equipment.

- Need for low spontaneous fluorescence → High-purity quartz raw material, with extremely low background signal under laser excitation at 488nm, 405nm, etc.

- Need for resistance to repeated cleaning → Integrated quartz structure, resistant to acids, alkalis, organic solvents and ultrasonic cleaning, remaining unchanged over a long period of use.

Optical and fluid performance advantages

Ultraviolet-visible transmittance: ≥88% at 200nm, ≥92% at 254nm, ≥94% at 340nm. Supports deep ultraviolet excitation (such as DAPI, Hoechst), expanding the range of detectable dyes.

Spontaneous fluorescence background: Signal at 488nm excitation is less than 1.2 times that of pure water background. Weakly positive samples are no longer submerged, improving data credibility.

Internal cavity surface smoothness: Optical surface Ra ≤ 0.2nm. Flow channel surface has no burrs or scratches, reducing cell/particle adhesion, improving recovery rate and detection repeatability.

Pressure resistance: Maximum 0.6MPa (designed based on wall thickness), compatible with high-pressure liquid phase injection system.

Chemical resistance: pH 1-14. Tolerant to acetone, ethanol, isopropanol. Can use standard cleaning procedures, no special care required.

Full-size customization capability (minimum order of 1 unit)

We support all the following dimensions for on-demand customization:

- Optical path: 0.2mm, 0.5mm, 1mm, 2mm, 5mm, 10mm, 20mm, 30mm, 50mm and any non-standard

- Flow channel cross-section: square, rectangular, circular, D-shaped, trapezoidal (for laminar flow optimization)

- Flow channel dimensions: width 0.1mm - 10mm, height 0.1mm - 10mm (extremely narrow flow channels for single-cell passage)

- Inlet and outlet ports: 1/4 - 28 UNF, M6, Schraut joints, scallop joints, smooth holes

- Number and position of interfaces: 2 ports (standard inlet/outlet), 3 ports (with exhaust), 4 ports (dual channels)

- External dimensions: compatible with standard colorimeter holders (12.5×12.5mm) or custom instrument slots

- Additional features: integrated temperature sensor slot, fiber optic interface, magnetic stirring avoidance slot, grating positioning mark

Solved application problems (typical scenarios)

1. Flow cytometer cell adhesion causing low count → High-polished quartz inner cavity + hydrophilic treatment, cell pass rate > 99.5%, recovery rate significantly improved.

2. Insufficient sample volume → Customized 0.5mm ultra-narrow optical path flow channel, sample requirement reduced from 200μL to 20μL, precious cells not wasted.

3. Interference in multi-laser multi-color detection optical path → Optimize the thickness and parallelism of the colorimeter wall, reduce stray light, improve multi-color compensation accuracy.

4. Colorimeter cuvette blockage in online water quality monitor → Customized large rounded transition flow channel + conical inlet and outlet, particles are less likely to accumulate, maintenance cycle extended by 3 times.

Customer Application Cases (Anonymized)

Case One: An OEM Manufacturer of Flow Cytometers

- Requirement: Special quartz cuvettes for a new generation of spectral flow cytometers, with an inner cavity size of 2×2mm square channel, a light path of 10mm, inlet and outlet ports with 1/4-28 UNF internal threads, and optical surfaces on all four walls having a transmittance of ≥90% at 355nm, 488nm, and 640nm wavelengths.

- Challenge: The original supplier could not simultaneously guarantee the dimensional accuracy of the small square channel inner cavity (tolerance < 0.02mm) and high transmittance.

- Solution: We used laser cutting for the initial blank of the inner cavity, then through the fluid polishing process for refinement, resulting in an inner cavity dimension tolerance of ±0.01mm, and the measured transmittance at three wavelengths (355nm, 488nm, 640nm) was 91%-93%.

- Result: The OEM prototype's signal-to-noise ratio improved by 25% compared to the previous generation.

Case Two: European Nanoparticle Size Analyzer Company 

- Requirement: Quartz flow-type cuvettes for nanoparticle tracking analysis (NTA), with a light path of 1mm, a circular channel with a diameter of 3mm, inlet and outlet ports with Ruhr female connectors, and an anti-static coating on the inner wall to prevent nanoparticle adsorption.

- Solution: We selected synthetic quartz, processed the circular channel as a whole and performed flame polishing on the inner wall, followed by spraying a special anti-static layer. Each cuvette undergoes a particle recovery rate test (100nm standard spheres) before shipment.

- Result: The particle recovery rate increased from the ordinary quartz's 72% to 96%, with good batch-to-batch consistency.

Case Three: CAR-T Cell Therapy Company

- Requirement: Flow-type cuvettes for slow virus vector titration detection, with an inner cavity width of only 0.5mm (to save precious samples), a light path of 5mm, and an inner wall with anti-cell adhesion coating.

- Challenge: The 0.5mm ultra-narrow channel is difficult to process accurately and most quartz manufacturers cannot complete such a narrow inner cavity polishing.

- Solution: We used micro-hole processing + fluid abrasive polishing technology, with an inner cavity surface roughness Ra ≤ 0.1μm, and coated with PEG-like anti-adhesion layer before shipment.

- Result: The sample volume per single test was reduced from 200μL to 15μL, and the detection throughput was increased by 3 times.

Case Four: A Water Quality Online Monitoring Equipment Company

- Requirement: Flow-type cuvettes for COD (Chemical Oxygen Demand) online analyzer, with a light path of 20mm, inlet and outlet ports with barbed connectors, requiring a pressure resistance of 0.3MPa and being resistant to strong oxidants (chromic acid potassium/sulfuric acid mixture) without corrosion over a long period.

- Solution: We used anti-hydrolysis fused quartz, processed as a whole, with a wall thickness increased to 2.5mm to enhance pressure resistance. Each cuvette undergoes 0.5MPa pressure retention test and acid immersion test before shipment.

- Result: The cuvettes have been used continuously at the field monitoring station for 18 months without leakage or transmittance decline.

Whether you are looking for a replacement cuvette for an old flow cytometer in your laboratory, or developing a matching flow cell for a new generation of analytical instruments, we can provide a feasible solution within 24 hours. Please provide us with the original cuvette photo, drawing or instrument model, and we will free of charge map it for you and issue a technical solution and quotation. Minimum order quantity is one unit, and samples will be delivered quickly. Click the website, send an email or call directly. Let your flow detection optical path become precise, stable and worry-free from now on.

Luverre Quartz manufactures and sells a wide range of high quality quartz glass, including quartz tubes, quartz plates, quartz rods, quartz windows, quartz crucibles, quartz boats, quartz flanges, quartz beakers, quartz glass instruments, and more. We can meet all kinds of customized requirements for quartz glass products.