Datasheet

Radiation detection modules
C12137 series
High accuracy, high sensitivity, compact radiation
detection module
The C12137 series is a radiation detection module containing a scintillator and MPPC® (multi-pixel photon counter) designed to
detect gamma rays from 137Cs (Cesium-137) and the like. The scintillator converts incident gamma rays into visible light, and
the MPPC detects the light down to extremely low light levels to measure low-energy gamma rays with high accuracy. The signal processing circuit and A/D converter are housed in a compact case. The modules provide a USB or RS-232C interface. The
products include sample software with functions for setting measurement conditions, acquiring and saving data, and drawing
graphs, etc.
Features
Applications
Gamma ray energy discrimination
Environmental monitoring and mapping
Modular design for easy integration into devices
Screening such as incoming and outgoing inspections at manufacturing sites
Incorporation into portable, high-sensitivity detectors
Compact and lightweight
Lineup
A total of eight types in four different sizes and two interfaces
(USB and RS-232C) are available that you can choose from according to your application.
C12137-08
C12137-08D
Real-time food inspection
C12137-10
C12137-10D
Real-time food inspection
* The characteristics are the same between the USB type and
RS-232C type (the software specifications are different).
C12137
C12137-00D
Portable, high sensitivity detectors
monitoring posts
C12137-01
C12137-01D
Food inspection
Structure
USB type
Parameter
Dimensions (W × D × H)
Weight
Detector
Scintillator
Scintillator size (W × D × H)
Sampling time
Interface
Compatible OS
Power supply
C12137
110 × 55 × 27
120
C12137-01
71 × 55 × 60.5
320
C12137-08
112 × 94 × 53.3
1130
C12137-10
122 × 122 × 53.3
1570
MPPC
CsI (Tl)
13 × 13 × 20
38 × 38 × 25
80 × 80 × 25
1 to 60 s, adjustable
USB 2.0 (Full Speed)
Windows 7 SP1 (32-bit, 64-bit)
USB bus power (150 mA typ., 500 mA max.)
www.hamamatsu.com
ɸ110 × 25
Unit
mm
g
mm
-
1
Radiation detection modules
C12137 series
RS-232C type
Parameter
Dimensions (W × D × H)*1
Weight
Detector
Scintillator
Scintillator size (W × D × H)
Sampling time
Interface
Bit rate
Power supply
C12137-00D
110 × 55 × 27
160
C12137-01D
71 × 55 × 60.5
360
C12137-08D
112 × 94 × 55.6
1170
C12137-10D
122 × 122 × 55.6
1610
MPPC
CsI(Tl)
13 × 13 × 20
38 × 38 × 25
80 × 80 × 25
10 to 60 s, adjustable
RS-232C (EIA-232-E)
115200
+5 V (200 mA typ., 500 mA max.)
ɸ110 × 25
Unit
mm
g
mm
bps
-
*1: Excluding the cable and connector
Absolute maximum ratings
Parameter
Operating temperature
Storage temperature
C12137/-00D
-10 to +50
-20 to +50
C12137-01/-01D
C12137-08/-08D
0 to +40
-10 to +50
C12137-10/-10D
Unit
°C
°C
Note: Exceeding the absolute maximum ratings even momentarily may cause a drop in product quality. Always be sure to use the
product within the absolute maximum ratings.
Electrical and optical characteristics (Typ. unless otherwise noted)
Parameter
Counting efficiency min.
Energy range
Energy resolution
Measurement range
(dose equivalent rate)
Measurement error
Condition
Cs, 0.01 μSv/h
137
137
Cs, 662 keV
662 keV*2
The lower limit depends on
the environmental radiation.
Excludes attenuation
(caused by the shield) and
counting fluctuations
137Cs,
C12137/-00D C12137-01/-01D
40
400
0.03 to 2
8
8.5
0.01 to 100
0.001 to 10
±20
C12137-08/-08D C12137-10/-10D
2000
0.06 to 2
9
10
Unit
cpm
MeV
%
*3
μSv/h
*3
%
*2: Measurement range of these products is defined by 137Cs. When detecting environmental radiation that mainly consists of low
energy radiation, the maximum measurement value will be approx. 1/3 to 1/2 of this figure.
*3: C12137-08/-08D/-10/-10D do not perform conversion into dose equivalent rate using the G(E) function.
Block diagram (C12137)
Gamma ray
MPPC
CsI(Tl)
scintillator
Preamp
Pulse-shaping amplifier
A/D converter
High-voltage
power supply
Microcontroller
USB
Power supply
KACCC0632EB
2
Radiation detection modules
C12137 series
Radiation detection modules incorporating a compact and high-gain MPPC offer the following features:
Feature
01 Detection of low energy gamma rays (down to 30 keV)*
4
The C12137 series can acquire energy spectra and therefore can perform energy discrimination.
137Cs
and energy discrimination
is known to decay while emitting gamma rays
at energies around 662 keV and 32 keV. The C12137/-01 can determine whether gamma rays is from
137Cs
by acquiring the energy spectrum from
the low-energy gamma rays at around 30 keV. As the gamma rays become lower in energy, the level of light emitted by the scintillator weakens.
However, the Radiation detection module, which uses a high sensitivity MPPC, is able to detect gamma rays over a wide range from low-energy
gamma rays around 30 keV up to about 2 MeV.*5
The low-light-level detection performance of high gain MPPCs also contributes greatly to reducing the measurement time. To reduce the measurement time, the scintillator capacity must be increased to improve the detection efficiency. However, as the scintillator capacity is increased,
the level of light that reaches the photosensor is attenuated inside the scintillator, and the lower limit of detection degrades accordingly. This
makes it more difficult to detect low energy gamma rays. The MPPC offers higher gain than the PIN photodiode or APD and makes low-lightlevel detection possible. Even when it is combined with a large capacity scintillator, low-energy gamma rays can still be measured.
*4: The lower limit of the energy range of the C12137-08/-10 is 60 keV.
*5: C12137/-01
Feature
02 Easy integration in devices
Cross-sectional schematic (C12137-01)
Since the radiation detection module includes a scintillator, photosensor
(MPPC), signal processing circuit, interface circuit, and the like in a small
case, it can easily be incorporated into portable measuring instruments
and in-line measuring instruments.
In the C12137 series, the photosensor MPPC is a small, thin type. The MPPC
Scintillator
takes up a small portion of the entire space: the space is predominantly is
taken up by the scintillator. This shows that even though the radiation
detection module is small, it can provide high photon detection efficiency.
Because the radiation detection module is compact, it is advantageous in
Signal processing circuit,
interface circuit
applications where the radiation dose from the object under measurement
is minute. Such applications include inspection of food and beverages. In
these types of applications, the periphery of the detector must be covered
KACCC0646EA
with lead to eliminate the effects of environmental radiation. Because the
radiation detection module is compact, the amount of used lead can be
reduced, which in turn reduces the volume and weight of the entire device.
03 Superb temperature stability
The level of emitted light by the scintillator due to in-
Ambient temperature and detected energy shift (C12137)
cident gamma rays and the photosensor sensitivity are
temperature dependent. This temperature dependence
60
causes a shift in the detected energy when the ambient
same energy are incident and ultimately causes measurement errors and interferes with radionuclide identification. The gamma ray detector unit of the C12137
series employs a structure with high temperature stability as well as a temperature-compensation circuit, which
exhibits excellent temperature stability even when the
temperature changes drastically. The graph below illustrates the detected energy shift of the C12137 in response to ambient temperature changes. The temperature stability is ±5% max. in the ambient temperature
range of 0 to +50 °C.
50
Ambient temperature (°C)
temperature changes even when gamma rays with the
4
Ambient temperature
Detected energy shift
3
40
2
30
1
20
0
10
-1
0
-2
-10
0
200
400
600
800
1000
1200
Detected energy shift [662 keV] (%)
Feature
-3
1400
Time (min)
KACCB0273EA
3
Radiation detection modules
C12137 series
Sample software
The C12137 series comes with sample evaluation software for inifial evaluation.
The software provides basic functions for setting measurement conditions, acquiring and saving data, and drawing graphs*5, etc. To help you
develop your own application software for operating the radiation detection module integrated in your equipment, function specifications and
sample software source code are also provided.
*5: A1 USB type
[Figure 3] Sample software
USB type
RS-232C type
4
Radiation detection modules
C12137 series
Dimensional outlines (unit: mm)
C12137
13.6
USB connector
110
19
5.5
28
45
55
Tolerance unless otherwise noted: ±0.1
(4 ×) M3 depth 3
34
18
KACCA0319EA
C12137-00D
27
13.6
CsI(Tl)
110
55
19
5.5
28
45
(4 ×) M3 depth 3
34
18
(2×)ϕ3.1
1
6
5
9
25
300 ± 10
30.7
11.5
27
CsI(Tl)
28
CN2
1
2
3
5
6
4, 7, 8, 9
Signal name
GND (Vcc)
TXD (module → PC)
RXD (PC → module)
GND (signal)
Vcc
NC
12.4
Tolerance unless otherwise noted: ±0.1
KACCA0339EA
5
Radiation detection modules
C12137 series
C12137-01
CsI (Tl)
55
71
28
0.5
28
0.5
USB connector
10.7
32
32
60
(4 ×) M3 depth 5
Tolerance unless otherwise noted: ±0.1
KACCA0320EA
C12137-01D
CsI (Tl)
300 ± 10
55
71
28
0.5
28
32
32
60
(4 ×) M3 depth 5
(2×)ϕ3.1
6
5
9
25
30.7
1
CN2
1
2
3
5
6
4, 7, 8, 9
Signal name
GND (Vcc)
TXD (module → PC)
RXD (PC → module)
GND (signal)
Vcc
NC
12.4
Tolerance unless otherwise noted: ±0.1
KACCA0340EA
6
Radiation detection modules
C12137 series
C12137-08
112
3
13.6
36.7
78
94
102
(8×) ϕ4 (Teflon bush for isolation)
USB port
Tolerance unless otherwise noted: ±0.1
KACCA0341EA
C12137-08D
112
15.9
36.7
78
Accessory cable (CN1) connector
(8×) ϕ4 (Teflon bush for isolation)
(2×)ϕ3.1
CN1 51021-0400 (MOLEX)
1
6
5
9
(35)
300 ± 10
CN2 XM3D-0921 (OMRON)
25
30.7
94
102
3
CN2
1
2
3
5
6
4, 7, 8, 9
Signal name
GND (Vcc)
TXD (module → PC)
RXD (PC → module)
GND (signal)
Vcc
NC
12.4
Tolerance unless otherwise noted: ±0.1
KACCA0342EA
7
Radiation detection modules
C12137 series
C12137-10
122
13.6
36.7
100
122
100
3
(8×) ϕ4 (Teflon bush for isolation)
USB port
Tolerance unless otherwise noted: ±0.1
KACCA0343EA
C12137-10D
122
3
15.9
36.7
100
Accessory cable (CN1) connector
(8×) ϕ4 (Teflon bush for isolation)
(2×)ϕ3.1
CN1 51021-0400 (MOLEX)
1
6
5
9
(35)
300 ± 10
CN2 XM3D-0921 (OMRON)
25
30.7
122
100
CN2
1
2
3
5
6
4, 7, 8, 9
Signal name
GND (Vcc)
TXD (module → PC)
RXD (PC → module)
GND (signal)
Vcc
NC
12.4
Tolerance unless otherwise noted: ±0.1
KACCA0344EA
8
Radiation detection modules
C12137 series
Precautions
· These products are precision devices that use a scintillator and are not designed to be used outdoors or in locations subject to vibration
or shock. To use them in such an environment, you will need to incorporate appropriate measures in the design.
Accessories
· USB cable
· CD-ROM (instruction manual, sample software)
Related information
www.hamamatsu.com/sp/ssd/doc_en.html
Precautions
· Disclaimer
MPPC is a registered trademark of Hamamatsu Photonics K.K.
Windows is a registered trademark of Microsoft Corporation in the United States and/or other countries.
Information described in this material is current as of February, 2016.
Product specifications are subject to change without prior notice due to improvements or other reasons. This document has been carefully prepared and the
information contained is believed to be accurate. In rare cases, however, there may be inaccuracies such as text errors. Before using these products, always
contact us for the delivery specification sheet to check the latest specifications.
The product warranty is valid for one year after delivery and is limited to product repair or replacement for defects discovered and reported to us within that
one year period. However, even if within the warranty period we accept absolutely no liability for any loss caused by natural disasters or improper product use.
Copying or reprinting the contents described in this material in whole or in part is prohibited without our prior permission.
www.hamamatsu.com
HAMAMATSU PHOTONICS K.K., Solid State Division
1126-1 Ichino-cho, Higashi-ku, Hamamatsu City, 435-8558 Japan, Telephone: (81) 53-434-3311, Fax: (81) 53-434-5184
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Cat. No. KACC1196E05 Feb. 2016 DN
9
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