The Turbidimeter replaces subjective visual comparison with objective photoelectric measurement. It measures the "cloudiness" or turbidity of a liquid by detecting the amount of light scattered by bacterial cells in a suspension. This ensures that every ID/AST card or panel is inoculated with a consistent concentration of bacteria (1.5X10^8 CFU/mL for a 0.5 McFarland), which is critical for the accuracy of Minimum Inhibitory Concentration (MIC) results.
| Feature | Specification |
|---|---|
| Measurement Range | 0.00 – 6.00 MCF (McFarland units) |
| Resolution | 0.01 MCF |
| Accuracy | +/- 0.01 MCF (within the 0.5–2.0 range) |
| Repeatability | CV < 3% |
| Light Source | Long-life monochromatic LED (standardized at 600nm or 625nm) |
| Display | Backlit digital LCD for high visibility |
| Zeroing/Calibration | Automatic one-touch zeroing using sterile saline or broth |
| Cuvette/Tube Size | Standard 12mm or 15mm glass/plastic test tubes |
| Power Supply | Dual Power: AC 220V/50Hz adapter or DC battery operation |
| Interface | RS-232 / USB for data transfer to DL-96 II main unit |