Radiation Pocket Radiation Pocket

Pocket radiation monitors

Pocket radiation monitors are small, handheld, lightweight, low power consumption devices designed for personal safety. They are typically used by first responders, HAZMAT team members, personnel in nuclear power plants, customs and border inspectors, and homeland security agents.


Silicon photodiodes for pocket radiation monitors

Silicon photodiodes are photodetectors without any internal gain and often rely on low-noise amplifiers for better signal-to-noise ratios.

Advantages of photodiodes vs. other photodetectors:

  • Most cost-effective for compact detectors
  • Lightweight and compact
  • Low bias voltage allows longer battery life and smaller heat load
  • Immunity to magnetic fields eliminates the need for shielding

Advantages unique to Hamamatsu’s photodiodes:

  • Uniform high sensitivity for large area photodiodes
  • High flatness of active area allows better coupling of scintillator to detectors

Silicon photomultipliers (SiPM) and arrays for pocket and handheld radiation monitors

TO-8 photomultiplier tubes (PMT) for pocket radiation monitors

Our TO-8 package-based PMT is lightweight and compact, and has high internal gain up to 106 and low noise. It is suitable to integrate into pocket or handheld devices. This type of PMT also comes in modules that include a high voltage power supply (HVPS) and an amplifier.


Advantages of PMTs vs. other photodetectors:

  • Cost effective for medium to large size detectors
  • Very high gain allows detection of lower energy particles and eliminates the need for costly amplifiers
  • Extremely low dark count improves the energy resolution and enables operation at higher temperatures


Advantages unique to Hamamatsu’s PMTs:

  • Various photocathode types for several scintillator emission wavelengths
  • Highest QE (quantum efficiency) from our unique UBA (ultra bialkali) or SBA (super bialkali) PMTs
  • Compact, integrated module with high voltage power supply and amplifier available

Detector power supplies for pocket, handheld and portal radiation monitors

Detector modules for pocket and handheld radiation monitors

Recommended products

Silicon photodiodes

These lightweight and compact photodetectors are perfect for compact scintillation-based radiation detectors without an identification function. These are used for pocket radiation monitors. 


TO-8 photomultiplier tubes (PMT)

These compact PMTs used for pocket radiation monitors are housed in a TO-8 sized metal package. Their high internal gain of up to 106 and extremely low dark count make them the best detectors for all types and sizes of scintillation-based radiation detection systems. 


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