Semi-Automatic Biochemistry Analyzer with Flow-Through Cuvette

What is the Semi-Automatic Biochemistry Analyzer with Flow-Through Cuvette?

This analyzer aspirates the reaction mixture into a fixed flow-through cuvette, reads absorbance, then washes the cell for the next sample. It is the classical low-cost platform for clinics that run many different assays in small numbers and want to avoid per-test cuvette costs.

Overview

The optical system consists of a halogen or LED source, a filter wheel with six to eight interference filters between 340 and 700 nanometers, and a silicon photodetector. Sample and reagent are mixed in an external or built-in incubation block, then aspirated through the flow cell by a peristaltic pump. Programming covers endpoint, kinetic and fixed-time assays, with one-point, two-point and multi-point calibration and up to one hundred stored test programs. Temperature control of the reaction is usually achieved by a Peltier unit or a water bath at 37 degrees Celsius. The main practical requirements are consistent pipetting, thorough cell washing between samples, and careful avoidance of bubbles and fibrin strands that can block the aspiration path.

How does it work?

A semi-automatic analyzer contains a light source, a wavelength selector such as interference filters or a grating, a temperature-controlled measuring position and a photodetector. The operator pipettes a measured volume of sample and working reagent into a cuvette or into a flow-through cell, mixes, and starts the reading. The instrument records absorbance at one or more wavelengths at fixed intervals, applies endpoint, kinetic or fixed-time calculation according to the selected program, and converts the signal into concentration using a stored calibration curve. Because the reaction temperature strongly affects enzyme kinetics, the measuring position is held at 37 degrees Celsius or at another programmed temperature, usually within 0.1 degrees Celsius. The operator's pipetting technique, cuvette cleanliness and correct reagent preparation determine the quality of the result, which is why training and written procedures matter more on this platform than on a fully automatic analyzer.

What are the key features?

• Fixed flow-through cuvette with 30 to 100 microliter optical path
• Six to eight interference filters covering 340 to 700 nanometers
• Program memory for up to one hundred assay protocols
• Peltier or water bath temperature control at 37 °C
• Endpoint, kinetic and fixed-time calculation modes
• Peristaltic aspiration with automatic cell rinsing

What are the technical specifications?

A typical semi-automatic biochemistry analyzer with flow-through cuvette configuration offers wavelength range of 340–700 nm with 6–8 filters, photometric range of 0–3.0 absorbance units, flow cell volume of About 32 µL, temperature control of 37 °C ±0.1 °C, throughput of 60–120 tests/h endpoint assays and program storage of 100 test programs. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Semi-Automatic Biochemistry Analyzer with Flow-Through Cuvette is used in routine biochemistry in clinics, enzyme and substrate assays in small batches, veterinary clinical chemistry and water and process analysis in research settings. Across the wider Semi-Automatic Analyzers class, laboratories also deploy it for low-volume clinical chemistry testing, rural and outreach clinics and veterinary biochemistry.

Which standards and certifications apply?

Relevant standards and methods include ISO 15189, CLSI EP05, CLSI EP06, CLSI C24, IEC 61010-1 and IEC 61010-2-101. Certification candidates for this model are CE, ISO 13485 manufacturing and NMPA class II registration; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Install the analyzer on a level bench away from draughts, direct sunlight and vibration, with a stable power supply and a grounded outlet. Verify performance at installation with a reference material or an assigned sample, and check the temperature of the measuring position with an external thermometer. Daily work should include a distilled water blank, a control sample at normal and abnormal levels, and cleaning of the flow cell or cuvette holder. Replace lamps at the end of their rated life or when the blank absorbance rises, keep filters clean and dry, and store reagents according to the label. The laboratory must document operator competence, since results depend on pipetting accuracy, and should review calibration at each new reagent lot.

How do I select the right Semi-Automatic Biochemistry Analyzer with Flow-Through Cuvette?

Specify this variant when many different assays run in small batches and consumable cost matters. In the RFQ state the wavelength range and filters needed for your menu, the flow cell volume and whether a larger path is preferred for low-absorbance methods, and the temperature accuracy required for enzyme assays. Ask about carryover specification and the cleaning routine between samples.

How does it compare with other Semi-Automatic Analyzers variants?

Choose a semi-automatic analyzer when the budget is limited, when fewer than about one hundred tests are performed per day, or when the reagent menu changes often and single-channel flexibility is valuable. Compare models by the wavelength range and filter set, whether they use a flow-through cell or single cuvettes, the temperature control accuracy, and the calculation modes supported. A flow-through cell reduces cuvette cost but needs careful cleaning between samples to avoid carryover, while disposable cuvettes simplify workflow at higher consumable cost. Check the number of stored programs, the ability to run two-point and multi-point calibration, and whether the analyzer can print or export results. Confirm that reagents are open, since proprietary reagents on a semi-automatic platform usually negate the cost advantage.