Cobia Dental

A simple-to-use instrument for routine inspection of Intraoral and CBCT X-ray equipment in dental clinics. Especially suitable for acceptance test, constancy test, and routine quality control.

Cobia Dental - for fast and easy intraoral and CBCT system testing

Cobia Dental has rapidly risen in popularity among dental engineers, physicists, and managers all over the world.

The Cobia Dental solution is the first choice for fast and easy Intraoral and CBCT system testing, service, and maintenance in a compact and lightweight portable kit. Measurements are displayed directly on the integrated screen and transmitted wireless straight to your Ocean software for easy storage and analysis.

Cobia Dental is a simple-to-use meter for checking that the output from Dental Intraoral X-ray tube is correct. Since the Cobia is so easy to position and doesn’t require any complicated settings, anyone who works in the dental clinic can quickly and easily perform the routine inspection of the intraoral X-ray equipment. To determine patient safety – every day.

Everyday “check ups”

The Cobia Dental is especially suitable for acceptance tests, constancy tests, and routine quality control of Intraoral X-rays. The basic need for a dental clinic calibration check of kV and exposure time is covered with the standard kV model of Cobia Dental. With a small addition to price, dose, total filtration and HVL measuring will also be included.




Ease of use

Cobia Dental is designed for “ease of use” which is accomplished through easy positioning and possibilities to choose your preferred language together with a powerful and clear color display. The screen is rotatable and is easy to read from a distance, and your 100 latest measurements will always be automatically saved.

Rotatable color display

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

Cobia Dental in different languages

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

RTI Dental solutions

Cobia Dental is designed to be the meter used by the dental clinic staff. For more advanced QA of Dental X-ray equipment, RTI recommends our multimeter – the RTI Piranha – together with our QA software Ocean.

Cobia Dental 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, 320 x 240 pixel
  • Min. exp. time
    0.1 ms
  • Auto-compensation
    1.0 – 90 mm Al Total Filtr. equiv.
  • Sensitivity
    0.2 mA @ 50 kV, 50 cm (3 mm 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 Dental Measuring Parameters

  • Tube volt.
    45 – 125 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)
  • 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 Dental Selection Chart

  • Cobia Dental
    kV & Dose
  • Time
    kV & Dose
  • kV
    kV & Dose
  • Dose
    kV & Dose
  • Dose Rate
    kV & Dose
  • HVL
    kV & Dose
  • Pulses
    kV & Dose
  • Pulse Rate
    kV & Dose
  • Dose/Pulse
    kV & Dose
  • Eff. Time
    kV & Dose

Article nr

  • Dental kV & Dose
  • Dental kV & Dose +External input
  • Dental kV & Dose +mAs +External input


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

Any questions?

Our goal is to take care of you too.

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.