Featuring:
radiation monitoring
systems
A Mirion Technologies Division
PRELIMINARY
SG 65/66
Detectors
SG 65/66
NaI Scintillators
The SG 65 and SG 66 scintillators have been deve-
loped for safety related monitoring of activity according
to KTA 1502. In the scintillator crystal, ionizing radia-
tion generates light pulses, which are converted and
ampli ed into charge pulses by the photo multiplier.
The height of the pulse is proportional to the energy
of the gamma radiation. An adjustable pulse ampli er
offers calibration of the sensitivity and matching of the
output pulses to the impedance of the detector cable.
APPLICATIONS
• Monitoring for gamma activity from in air and
liquids
FEATURES
● Reliable
● Robust construction
● Type tested
● High sensitivity
● Compact with 2” × 2” sodium iodide crystal
● Built-in pulse ampli er and buffer
● Output signal: low-impedance voltage pulses
● Temperature range until 80°C (SG 66)
Since norms, speci cations and designs are subject to occasional change, please ask for con rmation of the information given in this publication.
Mirion Technologies (MGPI) SA
Route d’Eyguières
FR-13113 Lamanon
France
T +33 (0) 4 90 59 59 59
F +33 (0) 4 90 59 55 18
Mirion Technologies (MGPI) Inc
5000 Highlands Parkway
Suite 150
Smyrna, GA 30082
USA
T +1 770 432 2744
F +1 770 432 9179
Mirion Technologies (MGPI H&B) GmbH
Landsberger Strasse 328a
DE-80687 Munich
Germany
T +49 (0) 89515 13-0
F +49 (0) 89515 13 169
Mirion Commercial (Beijing) Co., Ltd.
Shanghai Jiangchang Commercial Branch
Room 801, 78 Jiangchang SanLu
Zhabei District, Shanghai 200436
PR of China
T +86 21 6180 6920
F +86 21 6180 6924
SG 65/66
Detectors
TECHNICAL DATA
(1) U
discr
= -100 mV, U = 1000 V, T = 25°C
(2) without connector
EXAMPLE OF APPLICATIONS
www.mirion.com
145025EN-2
Properties SG 65 M SG 66
Background (1)
Sensitivity (1)
Energy resolution (50%)
Measuring range
without screen
with 10 cm lead
Test device TKA 04
with 185 kBq Cs-137
for Cs-137
with DPK 251
65 s-1 approx.
4 s
-1
approx.
2e4 s
-1
approx.
< 8%
0.5 … 5e5 S
-1
43 s-1 approx.
2.8e4 s-1 approx.
< 12%
0.5 … 5e5 s
-1
Output signal
Pulse width
High voltage
Supply voltage
0 ... -5V at 50 Ohms
1.2 μs approx.
-1 mV/keV
1000 V, 0.2 mA approx.
14.25 ... 25 V, 30 mA approx.
0 ... -5V at 50 Ohms
0.5 μs approx.
-1 mV/keV
1000 V, 0.06 mA approx.
14.25 ... 25 V, 30 mA approx.
Scintillator crystal
Detector housing
Magnetic shielding
Connectors
Cable
Ø × length NaI (Tl); 2” × 2”
Aluminium, Brass
μ-metal
Fischer S105 A 06093
TKK 05
NaI (Tl); 2” × 2”
Aluminium, Brass
μ-metal
Fischer S105 A 06093
TKK 05
Temperature range
Temperature change rate
Ambient pressure
Dimensions
Weight
Ø x length (2)
(2)
0 … +50°C (+32 ... 122°F)
< 5 K / h
0.7 … 1.2 bar
65 × 340 mm (2.5 x 13.4 in)
2 kg (4.4 lb) approx.
0 … +80°C (+32 ... +176°F), 100°C
(212°F) for <10h
< 2 K / min
0.7 … 1.2 bar
65 × 395 mm (2.5 x 15.5 in)
2.5 kg (5.5 lb) approx.
NaI scintillator detector SG 65 M
with digital signal processing channel DPK 251
Detector assembly for
liquids with SG 65 M and
RSD 221
Remote check
source TKA 51.1
Measuring vessel
RSD 221
Lead shielding RSA
468
Check source in test
position
Detector SG 65 M
with 2 ” x2 ” NaI
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