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Fluke Biomedical LANDAUER RaySafe


RaySafe i3 Real-time Radiation Dosimeter

RaySafe i3 Family
RaySafe i2 real-time display
Dosimeter on apron
i3 Dosimeter
RaySafe i2 real-time display
RaySafe i3 Family
RaySafe i2 real-time display
Dosimeter on apron
i3 Dosimeter
RaySafe i2 real-time display

Real-time Personal Radiation Dosimetry

Manage your radiation exposure instantly

Learn how the new RaySafe i3 system gives you immediate X-ray exposure information.

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2 surgeons checking the RaySafe i3

RaySafe i3, building a better radiation safety culture

The Raysafe i3 dosimetry system is the latest generation of the real-time dosimetry family. The real-time dosimetry system includes a set of the new RaySafe real-time personal radiation dosimeters coupled with a display and software to provide with a complete, immediate visual of radiation exposures.

Visualize X-ray exposure with the new i3 real-time radiation dosimeter using easy-to-read bar graphs. Instant feedback empowers your medical staff to learn and adapt their behavior on the go, minimizing unnecessary radiation exposure.

Measurements are simultaneously stored for post-procedure analysis, facilitating continued learning and to enable comparisons over time, between labs and between users.

Overview i3

Features and benefits

RaySafe i3 offers the following important benefits

Replaceable battery prolonged life cycle

The new radiation dosimeter has a replaceable battery, which means that longevity depends solely on wear and tear.

Better immunity to interference

RaySafe i2 dosimeters are sensitive to certain cell phone signals. The new real-time dosimeter is greatly improved in this regard no interference has been observed during heavy testing.

Automatic sleep mode

Only active dosimeters will populate the screen, regardless of where the inactive units are stored.

Enhanced measurement performance

Wider angular response means that radiation coming from below and from the sides is measured in a predictable fashion. Lowered dose rate threshold results in improved response when used with the latest low dose X-ray machines.



Detailed comparison

  RaySafe i3 Dosimeter RaySafe i2 Dosimeter
Radio communication Frequency depending on region
Compatible with existing real-time dosimetry products
Energy saving features
  • Longer transmission intervals when not irradiated,
  • Automatic sleep mode
Longer transmission intervals when not irradiated
PC connectivity Micro USB connector USB docking cradle
Battery User replaceable, non rechargeable Non replaceable, non rechargeable
Pocket clip Plastic clip, user replaceable Metal clip, non replaceable
Visual feedback LED error and wake up indication LED error indication
Energy range N40 – N150 N40 – N120
Dose rate uncertainty

±10% or 10 µSv/h (40 µSv/h – 150 mSv/h)

±20% (150 mSv/h – 300 mSv/h)

±40% (300 mSv/h – 500 mSv/h)

±10% (40 µSv/h – 150 mSv/h)

±20% (150 mSv/h – 300 mSv/h)

Angular dependency

< 5% (0° – 10°)

< 30% (10° – 60°)

+30% to -100% (60° – 90°)

< 5% (0° – 5°)

< 30% (5° – 50°)

+200% to -100% (50° – 90°)

Expected longevity Up to 10 years 3-5 years, until the battery runs out
Radiation Safety

Radiation Safety

Radiation protection is important because:

  • Radiation exposure from medical procedures has increased dramatically during the last few years
    Radiation exposure graph
  • Interventional cardiologists receive the highest amounts of radiation among medical personnel
    CT scan in progress

  • Radiation exposure can be reduced significantly by optimizing behavior and by using protective devices
    Equation graphic

ABCs for a Radiation Safety Culture™


Protective clothing and devices, such as lead aprons, thyroid collars, glasses, ceiling suspended screens and table-mounted lead curtains, are the first line of defense against radiation exposure. Personal dosimeters are used to monitor and help regulate exposure.

Waves pointed towards person behind wall


Your behavior will affect your radiation exposure. When feasible, increase the distance and decrease the exposure time. Furthermore, scatter radiation is typically lower on the detector side.

Finally, ensure that the proper equipment and appropriate techniques are used, including collimating the X-ray beam.

i2 behavior icon


Ultimately, controlling your dose is easiest when it is known. Only an active dosimeter, such as RaySafe i3, provides constant, real-time radiation exposure information. With the information it provides, healthcare workers can take action to reduce their dose.

i2 control icon


Dose Viewer works with the RaySafe i2 and i3 dosimeters when connected with a computer to display and analyze stored measurements and change dosimeter settings. 

RaySafe Dose Viewer lets you: 

  • View stored measurements, such as these, when the dosimeter is connected to a computer: 
    • Dosimeter ID number Battery status 
    • Accumulated dose 
    • Dose rate 
    • Time period 
  • Change dosimeter settings including name and annual dose limit 
  • View in a graph or a table format 


Dose Viewer software
Dose Viewer software
CT scan in progress

"The improvement in radiation protection has been more than dramatic at the URMC. There is no substitute for a constant and real-time reminder of the dose being received."

-Labib H. Syed, M.D., M.P.H.
University of Rochester Medical Center

"We feel better about our work and our safety. Now that we see what RaySafe real-time dosimetry does for us, we wouldn’t want to work at a place that doesn’t have it.”

-Dawn Dowling, Technologist
Lawrence General Hospital