Millipore Direct Detect Infrared Spectrometer DDHW00010-DD

The Millipore Direct Detect Spectrometer is an innovative infrared-based analytical instrument designed for rapid and accurate quantification of biomolecules such as proteins, peptides, and lipids in small sample volumes. Utilizing proprietary hydrophilic PTFE membrane cards, it measures the amide I band in the mid-IR spectrum, enabling dye-free, label-free detection without interference from buffers or detergents. This benchtop device is ideal for applications in biotechnology, pharmaceutical research, and academic labs, where precise protein concentration determination is critical for downstream processes like formulation, purification, and quality control. Key features include a user-friendly interface with a card insertion slot, Ethernet and USB connectivity for data transfer, and quick measurement times of approximately 5 minutes for up to 4 samples. Advantages over traditional methods like Bradford or BCA assays include higher accuracy in complex matrices, reduced sample consumption (as low as 2 μL), and elimination of colorimetric reagents, minimizing variability and waste. However, it requires proprietary sample cards, which can add to operational costs, and is optimized for aqueous samples, potentially limiting use with highly viscous or non-aqueous substances. The unit shown appears in good used condition, with no visible damage, making it a cost-effective option for labs seeking reliable biomolecule analysis.