The RadEye B20 from Thermo Scientific is one of the most widely used portable radiation detectors worldwide. Robust, reliable and easy to use, this instrument is essential for healthcare professionals, emergency teams and radiation protection technicians.
In this article, we analyze in detail the specifications, applications and advantages of the RadEye B20 and its extended range version, the B20-ER.
What is the RadEye B20?
The Thermo Scientific RadEye B20 is a multi-purpose contamination and dose rate meter, designed to detect and characterize alpha, beta, gamma radiation and X-rays. It is a high-sensitivity portable Geiger counter, ideal for fast field measurements.
The instrument stands out for its simplicity of operation combined with professional precision, making it suitable for both experienced users and personnel with basic radiation protection training.
RadEye B20 Technical Specifications
The RadEye B20 features technical characteristics that distinguish it in the portable detector market:
Radiation Types Detected
- Alpha Radiation (α): Detection of alpha particles for identification of contaminants such as americium, plutonium and radium
- Beta Radiation (β): Measurement of beta emitters such as carbon-14, phosphorus-32 and strontium-90
- Gamma Radiation (γ): Detection of gamma sources such as cesium-137, cobalt-60 and technetium-99m
- X-Rays: Monitoring of exposure to radiology equipment
Key Features
- Detector: Geiger-Müller tube with thin window
- Display: Backlit LCD screen
- Power: 2 AAA batteries (compatible with rechargeables)
- Battery Life: Over 400 hours in typical use
- Weight: Approximately 150g (with batteries)
- Dimensions: Compact, fits in pocket
- Protection: IP54 – resistant to dust and splashes
- Memory: Measurement history storage
Measurement Modes
- Dose rate: Continuous measurement in µSv/h or mR/h
- Accumulated dose: Integration of exposure over time
- Count (CPS/CPM): For surface contamination measurements
- Alarms: Configurable audible and visual
RadEye B20 vs B20-ER: Which to Choose?
Thermo Scientific offers two versions of the RadEye B20, each optimized for different usage scenarios:
RadEye B20 (Standard)
The standard model is ideal for:
- Routine monitoring in medical environments
- Contamination verification in laboratories
- QA of radiology equipment
- Training and demonstrations
RadEye B20-ER (Extended Range)
The ER (Extended Range) version offers:
- Extended range: Measurement up to higher dose rates
- Greater robustness: Reinforced construction for hostile environments
- Emergency response: Ideal for radiological accident situations
- Industrial applications: Industrial radiography and gammagraphy
The choice between the two models essentially depends on the expected dose rates in the working environment and the required level of robustness.
RadEye B20 Applications
The RadEye B20 is used in various sectors where radiation monitoring is critical:
Nuclear Medicine
In nuclear medicine departments, the RadEye B20 is essential for:
- Verification of contamination on work surfaces
- Monitoring of radiopharmaceutical spills
- Radioactive waste control
- Personnel decontamination verification
Radiotherapy
In radiotherapy departments:
- Verification of scattered radiation
- Control of restricted areas
- Monitoring during brachytherapy procedures
Emergency Response and Civil Protection
For first responder teams:
- Radiological triage in accidents
- Detection of orphan sources
- CBRN scenario assessment
- Security at large-scale events
Industry
Industrial applications include:
- Industrial radiography (NDT)
- Scrap metal control
- Nuclear facility decommissioning
- Petroleum industry (NORM/TENORM)
Borders and Customs
For security control:
- Container and goods inspection
- Detection of illicit materials
- Support for monitoring portals
RadEye B20 Advantages
The RadEye B20 stands out for the combination of features that make it unique:
Simplicity of Use
Intuitive interface that allows immediate operation, even by users with basic training. Turn on and measure – it’s that simple.
Proven Robustness
Solid construction that withstands drops, impacts and adverse environmental conditions. Tested in thousands of real situations worldwide.
Reliability
Thermo Scientific is a world leader in radiation detection instrumentation. The RadEye B20 benefits from decades of experience and continuous innovation.
Versatility
A single instrument for multiple radiation types and measurement modes, reducing the need for multiple instruments.
Accessory Ecosystem
Various compatible accessories available that expand the instrument’s capabilities for specific applications.
Frequently Asked Questions about RadEye B20
Does the RadEye B20 need calibration?
Yes, like any radiation measurement instrument, the RadEye B20 must be calibrated periodically (typically annually) by an accredited laboratory. Interphysix can coordinate this service.
What is the battery life?
With quality AAA alkaline batteries, the battery life exceeds 400 hours of continuous operation. Rechargeable batteries can also be used.
Does the instrument detect neutrons?
No, the RadEye B20 does not detect neutron radiation. For that application, Thermo Scientific offers other specific models from the RadEye range.
Is it possible to transfer data to a computer?
The RadEye B20 stores a measurement history in internal memory. For data transfer and advanced analysis, accessories and optional software are available.
Where to buy the RadEye B20 in Europe?
Interphysix is the authorized Thermo Scientific distributor for radiation detection equipment in Portugal and Spain. We offer new equipment, technical assistance and calibration service.
Conclusion
The RadEye B20 is an indispensable tool for any professional working with ionizing radiation. Its combination of simplicity, robustness and precision makes it the reference choice for hospitals, laboratories, emergency teams and industry.
Whether for routine monitoring or emergency response, the RadEye B20 offers the confidence necessary to make informed decisions about radiological safety.
Purchase RadEye B20 at Interphysix
Interphysix is the official Thermo Scientific distributor in Portugal and Spain for radiation protection equipment. Contact us for:
- Detailed technical information
- Personalized commercial proposals
- Equipment demonstrations
- Calibration service and technical assistance
- Compatible accessories
Request a quote or view the product page for more information.
Última actualização: 13/02/2026