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γ detector ADP-1111 measures Gamma (and X-ray) with high accuracy.
The 2 switches on the grip enable data-saving and time-constant changing, while directing it to the target.
This detector is connectable with TDC-9111.



Radiation Detected Gamma (and X-ray)
Detector NaI(Tl) scintillator
Detector size Φ25.4 mm × 25.4 mm
Relative Intrinsic Error Within ±15%
Linearity The response is within 0.85 to 1.22
(1 in 1μSv/h, IEC 60846-1:2009)
Energy Dose rate: 50keV to 3MeV
(The energy exceeding 3 MeV is compensated as 3 MeV)
Counting rate: 50keV or more
Measurement Range 0 to 30.0ks-1, 0 to 1.80M min-1
Background to 30.0 μSv/h, or 30.0 μGy/h
Background to 3.00 mR/h, or 3.00 mrem/h
Others Switches to change time constant and
save data, and LED light
Weight Approx. 340 g (excluding cable)


Connectable Detectors α/β detector, β detector, γ detector.
Radiation types are automatically identified when detector is connected.
Display Black and white LCD (with backlight and touch panel)
Display Mode Detailed, simplified, time-series, scaler, preset list and user settings
Displayed Contents Measurement value (digital and bar graph), measurement unit,
radiation type, time, time constant, battery level, peak hold value
and overload, etc.
Sound Alarm, measurement count
Alarm Settings: α, β and γ can be individually set
Display: alarm, sound simultaneously with LED flashing
Alarm Clear AUTO: Automatic clear when the value is under preset
HOLD: Alarming until RESET switch is pressed
Scaler Mode Preset time: 1 to 9,999 sec (999,999 counts at max by selecting 0)
Repeat time: 5 times at max
Earphone Earphone adapter socket for Micro USB is required
Data Saving Instantaneous value at any time or at preset intervals
144,000 data (in case of 100-day measurement at 60-second intervals)
100 folders can be created at max
Output USB2.0, Mass storage class
Power Primary battery: 8 AA alkaline batteries
Secondary battery: 8 AA NiMH batteries
USB supply (USB2.0)
Battery Life Connecting ADP-1111
Primary battery: 30 hours or longer (by new batteries at 20 degrees C)
Secondary battery: 12 hours or longer (by full-charged batteries at 20 degrees C)
Environmental requirements in
Temperature : -20 to +50 degrees C
Humidity : 90%RH or less (Non-condensing)
Dimensions Approx. 10 (W) x 19 (D) x 8.5 (H) cm
(excluding handle and protrusions)
Weight Approx. 740g (including batteries, and excluding detector and cable)

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Please note that all descriptions in this website conform to the Pharmaceutical and Medical Device Act in Japan as well as other laws and regulations in Japan. Model names, specifications and configurations of products in overseas market outside Japan may be different by the countries.