CoolLED pE-340 Fura

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The CoolLED pE-340fura is a bespoke LED Illuminator for Fura-2 ratiometric calcium imaging. The system utilises the successful pE-300 Series platform, and also supports everyday fluorescence microscopy in a compact and affordable package.

LED technology is quickly evolving, and since 2017 our new generation has double the irradiance at the sample plane, and for even higher irradiance is available as a Direct Fit model (which also reduces the cost to buy and run thanks to fewer consumables). With ACT Label certification, it’s even an environmentally friendly option for illumination.


Light Source, Control Pod, set of three Excitation Filter Holders (25mm dia.) & Excitation Filters for 340nm & 380nm, Power Supply, Plug (Direct Fit version includes microscope adapter).


Please confirm microscope make & model at Checkout
Please confirm microscope make & model at Checkout

The 340 nm and 380 nm LED illumination system provides the optimum excitation wavelengths for Fura-2-based calcium imaging, allowing high-precision, stable, high-throughput imaging with video-rate time resolution.

High-speed acquisition

Until recently, the response time of illumination systems for Fura-2 imaging has been limited to milliseconds due to mechanical switching of the wavelengths in arc lamp and monochromator systems.  However, the new pE-340fura can be controlled via convenient BNC TTL connections for precise illumination control in as little as 20 microseconds.

Improved cell viability and cost

Using the new pE-340fura LED Illumination System, less Fura-2 dye can be loaded into the cells whilst still maintaining the same measured calcium concentration and good signal-to-noise ratio.  The reduction in required dye not only improves cell-viability due to reduced dye toxicity, but also results in a cost reduction per experiment.

Improved signal to noise

Work by Sandrine Prost et al., from the University of Edinburgh, has shown that with independent wavelength controllable LED sources, signal-to-noise is dramatically improved over bulb systems and even over some available white broad-spectrum LED sources.

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CoolLED pE-340 Fura Brochure

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