GammaView NaI Survey Meter

GammaView Sodium Iodide Scintillation Survey Meter by SE International

For Low Energy Gamma / X-Ray Survey

Optional Bluetooth

Data-logging feature on Android app creates GPS Stamp for each Survey

The GammaView is useful for performing surveys and measurements of gamma radiation fields in the  environmental. The range is from μR/hr level,  up to 5 mR/hr. The standard GammaView utilizes a 1x1 NaI scintillation detector for high sensitivity,  in a lightweight ergonomic package. Calibrated against Cs-137 (662 keV), the GammaView is sensitive to low-energy gamma down to around 30 keV (I-129). The GammaView can be used as a single-channel analyzer (SCA). This function allows a “window” to be set to focus on a specific energy region of the gamma spectrum. This setting can be changed by using the Observer USB software.  Please see our video for instructions.

Online Ordering for US Orders Only

Gamma Scintillator Detector 

1x1 NaI Scintillation Probe. 2.5 cm (1 in) dia. x 2.5 cm (1 in) thick with C Connector 

The GammaView is optimized for use with the included 1x1 NaI probe. Please contact us for different probe options. 

Operating Range 

mR/hr – 1 μR/h to 5 mR/h 
μSv/hr - 0.001 to 50 
CPM – 0 to approx. 875,000 
CPS – 0 to approx. 14,584 
Total Counts - 0  to  999,999 

Energy Range 

20 Kev to 1.5 MeV 

gammaView energy response curve

Typical sensitivity 

150 CPM/µR/hr. 


±10% with Source Calibration (Referenced to Cs137) 

Operating Voltage 

Typically 500 to 1200 Volts 

Selectable Alert Set Range 

mR/hr - 1 μR/h to 5 mR/h 
μSv/hr - 0.001 to 50 
CPM - 1 to 875,000 
CPS- 1 to 14,584 
Pulsating beeper sounds the alert. 


Graphic Display with Backlight 

Averaging Periods 

Display updates every 3 seconds. At low background levels, the update is the average for the past 30-second time period. The timed period for the average decreases as the radiation level increases.


Meter will hold at OVER RANGE in fields as high as 100 times the maximum reading. 


USB for use with Free Observer USB Software for PCs, Bluetooth for use with the Free Observer BLE App for Android. 

Count Light 

Red LED flashes with each radiation event. 

Audio Indicator 

Internally mounted beeper (can be switched off for silent operation) 

Power Requirements 

Two AA alkaline batteries (included). Approx. 500 hrs @ background. 


Base unit - 140 X 68 X 33 mm (5.5 X 2.7 X 1.3 in.), Probe- 5.0 X 18.5 cm (2 x 7.3 in) 

Temperature Range

-15°C to +50°C (14°F to 122°F)


10% to 70% Non-Condensing. 


Base unit - 193 grams (6.8 oz) with batteries. Probe- 393 grams (13.8 oz) 


NIST Certificate of Calibration, Carrying Case, Xtreme Boot, Stand, Lanyard, Mini-USB Cable, Free Observer USB Software Download, Free Observer BLE Software Download. 


One Year Limited Warranty