The EIGER R 4M rivals CCD and image plate detectors in size but far outperforms them in collection efficiency, background noise and resolving power. This makes it the ultimate detector in cutting-edge instruments for the most demanding experiments. 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, minimal dead time and high quantum efficiency of EIGER 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.

 "While my group had access to the EIGER R 4M at our Rigaku FR-X diffractometer, we were able to test 70S and 80S ribosome crystals reliably in our X-ray facility. Because of that, our planned synchrotron time was cut by 90%." Marat Yusupov (IGBMC, France)


Specifications EIGER R 4M

Number of detector modules
2 x 4
Sensitive area (width x height) [mm2]
155.2 x 162.5
Pixel size [µm2]
75 x 75
Total number of pixels
2070 x 2167 = 4,485,690
Gap width, vertical [pixel]
Inactive area [%]
Defective pixels [%]
< 0.03
Maximum frame rate [Hz]
Readout time
continuous readout, 10 μs dead time, duty cycle >99%
Point-spread function
1 pixel
Sensor thickness [μm]
Threshold energy [keV]
2.7 - 18
Maximum count rate [phts/s/mm2]
5 · 108
Image bit depth [bit]
Dimensions (WHD) [mm3]
235 x 235 x 372
Weight [kg]
Power consumption [W]

All specifications are subject to change without notice.


  • Hybrid Photon Counting: Direct detection of X-ray photons combined with single-photon counting
  • No readout noise or dark current for best signal-to-noise ratio
  • Highest spatial resolution thanks to direct detection
  • Frame rates up to 10 Hz with duty cycle > 99%
  • 32 bit dynamic range (> 4 billion) thanks to 800 Hz internal frame rate and continuous readout
  • Count rates up to 5·108 phts/s/mm2
  • Continuous threshold for fluorescence suppression
  • Room temperature operation of all detector components for high reliability
  • Optional vacuum compatibility
  • Service-free with minimal maintenance


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