Surface plasmon resonance (SPR) biosensor
2 channel | SR7500DC Reichert Inc

The NEW SR7500DC Pushes Detection Limits and Sensitivity to New Lower Limits

The sensitivity starts with image detection. The SR7500DC uses two RL1210 Perkin Elmer Photodiode 1024 pixel arrays that feature 100,000:1 dynamic range and 0.4 picoAmp dark current. Translation: Extreme sensitivity.

On board computing power is via an Altera FPGA with a virtual softcore 32 bit processor. This equates to massively fast and furious pipeline processing. And the processor is field programmable for future upgrades. Illumination is via two 780 nm arrays with 66 LEDs each. The twin LED banks illuminate an integrating sphere to provide two watts of fully homogenized light power. LED current is critically controlled to provide constant output power via an isolated feedback circuit.

The SR7500DC features a new high speed USB interface. Data sampling rate is 0.5 to 10 Hz. An embedded peripheral hub controls the complete system including pumps, autosampler and semi-automatic injection valve.

Bottom line: Reichert’s new low-noise, component-based SR7500DC Surface Plasmon Resonance System provides outstanding flexibility and exceptional sensitivity when seeking high quality data for biointeraction analysis. This includes the ability to detect small molecules less than 100 Daltons. Its simple, modular design offers superior performance with high sample capacity (two 96 or 384 well plates), greater precision, minimal maintenance requirements, and low life cycle costs.