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XRS25 25mm X-ray Shutter

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Part Number: XRS25 Categories: , Tags: ,


The Uniblitz XRS25 has been designed specifically for x-ray switching applications. The innovative platinum-iridium (PtIr) blade design allows beam extinction of 90% up to 30 keV x-ray energy (based upon the tenth value extinction of PtIr). The XRS25 is well suited for applications such as x-ray crystallography, medical x-ray imaging, etc.

Uni-stable shutter devices, like the XRS25, require power to hold the blades in the open state.


Key Features

  • 25mm aperture
  • Uni-stable operation
  • Capable of blocking x-ray energy (30 KeV)
  • Slim, low-profile form-factor
  • RoHS Compliant
  • Transfer time on opening: 10.0 milliseconds
  • Total opening time: 16.0 milliseconds
  • Configured for the VCM-D1 Shutter Driver


For additional technical information please see the XRS25 X-ray Shutter Datasheet.

Coil Resistance Pulse Voltage to Open Hold Voltage1 (Nominal)
12 OHMS +65 VDC +5 VDC


Weight Unhoused Weight Housed Operating Temp. Max. Opening Bounce Max. Closing Bounce Max. Freq. of Operation2 Number of Shutter Blades
4.40 oz
(0.13 kg)
12.98 oz (0.37 kg) 0 - 80 °C 15% 5% 2.0 Hz / 10.0 Hz 2


1 Voltage level required across actuator coil when being held in the open position.
2 (Continuous/Burst) Continuous frequency rating specified at shutter’s minimum exposure pulse. Burst frequency rating specified for four (4) seconds maximum with one (1) minute minimum between bursts.


Electronic Synchronization System

The electronic synchronization system provides a feedback signal (through the driver utilized) after the shutter transfers to the open state. The system incorporates an infrared emitting diode, an infrared sensitive detecting transistor, and an interrupting vane. The vane is attached to the shutter so as to block the light path between the emitter and detector in the closed position. When the shutter transfers to the 80% open position, the vane is removed from the infrared light path, allowing the emitter to switch the detector to the active state. For the XRS25, this system uses a similar activation flag attached to the mechanism, which triggers a reflective emitter/detector device. No connection to the designated synchronization pins when no electronic sync. is selected.

Shutter Timing


The question regarding enhancement of shutter speed with the application of user supplied lubricants has been repeatedly asked. It is our experience that lubricating the shutter blades will actually slow the shutter down and eventually render the shutter inoperable. Under no circumstances should any type of lubricant be applied to the shutter blade area.


XRS25 (w/ VCM-D1 driver and Teflon® coated blades) Time (msec.)
0-A:     Delay time on opening after current is applied 6.0
A-C: Transfer time on opening 10.0
0-C: Total opening time 16.0
C-E: Min. dwell time with min. input pulse 17.5
B-F: Min. equivalent exp. time 5.0
E-G: Transfer time on closing 15.0
A-G: Total window time 30.0
MET: Min. exposure time 20.0
TEP: Typical exposure pulse >30.0


Technical Drawings


Uniblitz XRS25 Technical Drawing (Housed)


Uniblitz XRS25 Technical Drawing (Un-housed)

Connector Layout

Uniblitz XRS25 Technical Drawing (Connector layout)


Tenth Value Extinction of PtIr



XRS25 Datasheet Download


3D Models
XRS25 3D Models (Housed, unhoused, normally open - STEP files included in ZIP) Download

Additional information

Weight 1 lbs
Dimensions 7 x 7 x 3 in
Driver Compatibility




Blade Option

Electronic Sync.




For use in Vacuum



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