Cobia Smart R/F

Cobia Smart is a simple-to-use instrument for checking that the output from an X-ray tube is correct. No adjustments are required, making it exceptionally easy to use.

Cobia Smart R/F

Cobia Smart is a simple-to-use instrument for checking that the output from an X-ray tube is correct. Place it beneath the X-ray tube, take an X-ray exposure, and instantly get an accurate reading. The measured values can be read directly from Cobia Smart’s large and clear display, even from a distance. No adjustments are required, making it exceptionally easy to use.

Check and go

Cobia Smart is perfect for anyone wanting to ensure that an X-ray device is functioning as it should. For example, Cobia Smart is ideal for checking fast and often that the kV and/or dose are not changing over time.



Rotatable color display

Cobia Smart has a very clear and rotatable color display, so you can read off measurement results fast and easily – even from a distance. The innovative and smart display even shows the results right way up in measurement situations where the instrument needs to be positioned upside down.

Cobia Smart in different languages

As well as English, you can choose to run your Cobia Smart in several languages such as Chinese, French, German, Japanese, Norwegian, Russian, Spanish, Swedish, and Turkish. These can easily be selected via the Cobia menu, and we constantly update with more languages.

Cobia Smart General

  • Weight Approx
    290 g
  • Size
    138 x 76 x 27 mm³
  • Power source
    Internal battery / ext. power supply
  • Battery life
    10 – 20 hours
  • Display
    Color, 320x240 pixel
  • Min. exp. time
    0.1 ms
  • Sensitivity
    0.2 mA @ 50 kV, 50 cm (3mm Al)
  • Warranty
    2 years
  • Extended Warranty
    Up to 10 years
  • Calibration Cycle
    2 years
  • Standard
    Complies with relevant parts of the standards IEC 61674 and IEC 61676 for dosimetric instruments.
  • PTB Approval

Cobia Smart Measuring Parameters

  • Tube volt.
    38 – 155 kVp (±2 %)
  • Time
    0 ms – 9999 s (±1 % or ±0.33 ms). 3 – 9999 pulses
  • Dose
    70 nGy–1700 Gy (±5 %). 8 μR – 200 kR (±5 %)
  • Dose rate
    2.5 µGy/s – 175 mGy/s (±5 % or ±200 nGy/s). 0.3 mR/s – 20 R/s (±5 % or ±2 μR/s). 17 mR/min – 1200 R/min (±5 % or ±0.1 mR/min). 1 R/h – 70 kR/h (±5 % or ±70 mR/h).
  • Auto-Comp.
    1.0 – 90 mm Al Total Filtr. equiv.
  • HVL
    1.2 – 14 mm Al (±10 % or ±0.2 mm)
  • Total Filtration
    1.0 – 90 mm Al (±10 % or ±0.3 mm Al)
  • Pulse frequency
    1/6 – 260 Hz (±1 % or ±0.2 Hz)
  • Dose/pulse
    10 nGy/p – 600 mGy/p (±5 %). 1.1 µR/p – 66 R/p (±5 %)
  • Effective time
    0 ms – 9999 s (±1 % or ±0.33 ms)

Cobia Smart Selection Chart

  • Time
    R/F – kV & Dose
  • kV
    R/F – kV & Dose
  • Dose
    R/F – kV & Dose
  • Dose Rate
    R/F – kV & Dose
  • HVL
    R/F – kV & Dose
  • Total Filtration
    R/F – kV & Dose
  • Pulses
    R/F – kV & Dose
  • Pulse Rate
    R/F – kV & Dose
  • Dose/Pulse
    R/F – kV & Dose
  • Eff.time
    R/F – kV & Dose
  • Soft Shell case
    R/F – kV & Dose

Article nr

  • Smart kV & Dose


1. Do you have the latest software?
It is always good to have the latest update for your instrument. This is because we continuously fix bugs and make improvements.

2. Have you read our FAQ?
For the most common application and measurement issues, we have collected the answers in one place, please visit our FAQ page. This is so that you will get a quick answer to your question.

3. Have you checked the application notes?
In our application notes, you will find answers, solutions and tips for some specific measuring task that may arise. Here you will also find instructions on how to measure on some unusual X-ray machines and new measuring set-up.

4. Contact your local distributor
Your local representative – our extension in the world – is an expert on RTI’s products and can help you to answer your questions and support you. This way you can get help in your time zone and in your own language.

5. Contact us
We encourage you to contact us if you have questions or problems. We are here to help you and be your partner in your everyday working life.

Product configuration

Which RTI Solution suits your needs? RTI offers complete quality assurance solutions for all types of X-ray equipment.

To be able to find out which instrument and solution suits you, we need to know a few things about you and your measurement situation. Please fill out this form, and we will get back to you with a product suggestion.

Contact Information

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Click below to visit our Support page.


Selected partners

PTB is Germany's National Metrology Institute and handles scientific and technical service tasks. With metrology as the PTB's core competence, the organisation's goal is to measure with the highest accuracy and reliability. PTB represents progress and reliability in metrology for the benefit of society, trade and industry, and science.
The ANSI National Accreditation Board (ANAB) is the largest multi-disciplinary accreditation body in North America. ANAB accredits the full spectrum of conformity assessment bodies, including calibration, testing and inspection.
The International Electrotechnical Commission (IEC) is the world’s leading organization that prepares and publishes International Standards for all electrical, electronic and related technologies.
AAPM is a scientific and professional organization, composed of more than 8000 scientists, whose primary goal is the identification and implementation of improvements in patient safety for the medical use of radiation in imaging and radiation therapy.