The EIGER2 R 4M is our flagship detector for X-ray diffraction and scattering in the home lab. It features the most advanced HPC technology on a large active area of 155 by 163 millimeter, close to an ideal square shape. It outperforms any other laboratory detector in collection efficiency, background noise and resolving power. This makes it the ultimate detector in cutting-edge instruments for the most demanding experiments. Dual energy discrimination allows for suppression of low and high energy background while single-photon counting ensures zero detector background for best possible data.

The unique combination of large active area and an extremely sharp point-spread function thanks to direct detection is of particular advantage in macromolecular crystallography. It allows for collecting of high-resolution data from large unit cell crystals with closely spaced reflections in a single sweep. The high frame rate, zero readout dead time and high quantum efficiency of EIGER2 R 4M enable sophisticated data collection protocols like the acquisition of datasets with high multiplicity for experimental phasing based on the anomalous signal from sulfur, phosphorous or native metal ions. You can collect data in extreme phi-slicing mode for optimally defined spot profiles and integrated data of higher quality. The small pixel size and sharp point-spread function allow you to take full advantage of the small focal size of state-of-the-art X-ray sources and optics and measure smaller crystals than ever before.

Specifications EIGER2 R 4M

Number of detector modules (W x H)

2 x 4

Sensitive area (width x height) [mm²]

155.1 x 162.2

Pixel size [µm²]

75 x 75

Point-spread function

1 (FWHM)

Energy discriminating thresholds


Threshold range [keV]

3.5 - 30

Counter depth [bit/threshold]

2 x 16

Acquisition mode

simultaneous read/write with zero dead time

Image bit depth [bit]


Maximum frame rate [Hz]


Vacuum compatibility (optional)




Dimensions (W x H x D) [mm³]

235 x 237 x 372

Weight [kg]


Maximum count rate [cps/mm²]

6.9 x 10⁸

Total number of pixels

2068 x 2162 = 4,471,016


All specifications are subject to change without notice.


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