Grant Bio McFarland - DEN-1 Densitometer

Applications & Use Cases

• Determining cell concentration in fermentation or culture processes.
• Assessing microbial susceptibility via turbidity changes.
• Identifying microorganisms in test systems.
• Measuring optical density/turbidity at a fixed wavelength for dyes or suspensions.
• General quality control in microbiological and biotechnological laboratories.

Typical Specifications

Typical measurement range

Typically 0.00 to 15.00 McFarland units, or equivalent optical density.

Measurement accuracy

For this class of equipment, accuracy is commonly ±0.1 McFarland units for standard ranges.

Power supply

Units of this type commonly operate on low voltage DC, supplied via a universal AC adapter (e.g., 100-240V AC input).

Sample volume

Typically requires small sample volumes, often 2-3 ml in standard cuvettes or test tubes.

Wavelength

Commonly operates at a fixed wavelength, typically 565 nm, optimised for McFarland scale measurements.

Footprint

As a benchtop unit, it typically has a compact footprint, suitable for laboratory benches with limited space.

Frequently Asked Questions

• What is a McFarland Densitometer used for?

  A McFarland Densitometer is primarily used in microbiology and life sciences to measure the turbidity or optical density of cell suspensions, such as bacterial or yeast cultures. This helps in standardising cell concentrations for various assays.

• Is this unit suitable for pharmaceutical quality control?

• What type of samples can be measured?

• Does it require calibration?

• What are the typical maintenance requirements?