MEASALL Radiation Dosimeters and Gamma-Spectrometers KC761
SKU Part Number: KC761
Scintillator sensor gamma-spectrometers and radiation dosimeters KC761    Product Features  Primary sensor using CsI (2.54cm³)...
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Scintillator sensor gamma-spectrometers and radiation dosimeters KC761


 Product Features 

  • Primary sensor using CsI (2.54cm³) scintillator and SiPM, and auxiliary sensor using PIN tube (9mm²).
  • Powered by three dry cell batteries (AA/LR6) for up to 10 days of continuous use* (power saving mode on at low count background radiation).
  • Support USB (type-C) power supply, POE power supply and can automatically switch.
  • Weighs 300g and includes a display that can directly show the energy spectrum and other data with no need to connect to a cell phone; IP65 level waterproof.
  • Wide range of interfaces, built-in WIFI, Bluetooth and RJ45 ports (supports POE power) and microSD card slot for easy data transfer.
  • With light, sound and vibration alerts.

Product Functions

  • Radiation measurement with Multi-Channel analyzer
  • Dose display based on energy compensation(up to 100μGy/h)
  • Radioactive isotope identification


KC761 on DOSE mode

KC761 on SPEC mode


Product Parameters

  • Energy scale of gamma rays

    Uncertainty ≤ ± (5% + 20keV) or typical uncertainty ± (2% + 10keV) at 23±5°C within 100 to 10kcps

  • Energy resolution of gamma rays

    Based on the technical parameters published by the sensor.

  • Standard sensor: (Left window)Crystal 10X10X25.4mm CsI(Tl) with 2X9mm² SiPM energy resolution 10%
  • Additional resolution degradation of the instrument (95% confidence level):
  • where E is the peak center energy in keV.


  • Gamma radiation absorbed dose rate (error exists)

    Energy spectrum mode: background ~ 1mGy/h, uncertainty ±15%@662keV
    Dose mode: background ~ 2mGy/h, same as above
    Compensated energy response: ±20% (80keV~1.5MeV), -23%~+43% (50keV~2MeV)
    Strong radiation alert: 1mGy/h~10Gy/h, -50%~+100%@662keV. Since energy compensation is not available at this time, the error may be greater at other energies.

  • Gamma radiation equivalent dose rate (error exists)

    ≤1mSv/h, typical uncertainty ±15%
    > 1mSv/h, -50% to +100%
    Equivalent dose (typical value at ≤1mSv/h, directionality exists):HP(0.07), HP(3): ±30%, HP(10): ±20%
    Limit of equivalent dose accumulation: ~10Sv

  • Measurement time

Energy spectrum accumulation time: settable from 1s to 86400s (maximum count rate of 80kcps for scintillation detector, maximum count rate of 10kcps for PIN detector).

Dose accumulation time:any time: since the last time the user cleared the accumulated dose, to view the accumulated dose, nonvolatile storage cycle ~ 1h, shutdown and save.

  • Stability 

Temperature stability: -20~45℃, amplitude drift ≤±10%, energy drift ≤±5%.
 Long-term stability: typical amplitude drift ±10%/a, typical valuedrift ±5%/a.



  • Standard sensor: (Left window)Crystal 10X10X25.4mm CsI(Tl) with 2X9mm² SiPM energy resolution 10% ; 3x3mm PIN detector
  • Temperature range: -20~50℃(work properly ); -40~65℃ (performance not guaranteed )
  • Humidity range: 0% to 100% ( for short term, when there is no condensation inside the device)
  • Altitude: -2000m~8000m(Barometric pressure change rate<10hPa/min)
  • Waterproof level: IP65 (for short term, the rubber cap on the interface must be well-covered)
  • Seismic resistance: 1g,20Hz,30min
  • Shockproof: Any direction, 1.5m, without functional failure, but performance degradation (including loss of accuracy) or cosmetic damage may occur.



What in Package

KC761 *1
Short strap *1

Additional information

Weight 0.45 kg
Dimensions 18 × 12 × 6.7 cm


We have several shipping options for our products, including next-day and Saturday/Sunday delivery for certain items. Please see these options at checkout.


If you have any equipment that needs to be returned to Martin Lynch & Sons, please fill out the form below:

Click here for returns form

Upon receipt of goods you have 14 days to return goods however the goods must be returned in original packaging and care must have been taken with the goods you wish to return. Under distance selling regulations you are not entitled to any refund on carriage charges or modification charges made at your request.

Warranty Terms and Conditions

Outside of the 14 faulty return period, returned items cannot be accepted, unless covered by manufacturer's warranty. We will repair as much as possible on site however in exceptional circumstances products may have to be returned to the manufacturer of distributor.

For repairs/replacements under manufacturer’s warranty for any item please download a ML&S return form from the link above and return to ML&S with the faulty product.

International Warranty information

Warranty service for items we sell is available in the U.K. only, unless otherwise noted. It is your responsibility to pay freight for returned items to the U.K. and back to you for desired warranty coverage. All of our NEW products come with a minimum 12 month warranty, (Yaesu & Icom 24 months), with up to 90 days on second-hand equipment. Items returned for service must state "returned goods for repair" on the return air waybill or U.K. import customs duties apply and will be added to your invoice. For more info about returning items please contact our customer help desk, [email protected]