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FEATURES
Quick measurements ●
Automatic alpha detection ●
β ● measurement
Fast decontamination
●
Easy to use, compact ●
Built-in computer ●
Direct display in contamination units ●
Built-in printer ●
NT200
Contamination and Clearance CheckPoint: Area
NT 2001
Smear Test Instrument
The NT200 is a small and easy to use smear test
instrument.
The compact design and low weight allows usage
on the location where the smear sample is taken.
A 50mm (1.97 in) lead shield and a separate bac-
kground detector allows measurements in increased
background environment.
The NT200 has three measurement modes:
Beta mode•
Beta and alpha mode•
Beta and automatic alpha (if any) mode•
High sensitivity•
This makes the instrument versatile and easy to
adapt to different tasks.
Housed in a compact and modular housing together
with an integrated ticket printer, it allows direct ope-
ration on the smear sample located in the controlled
area.
TM
health physics
A Mirion Technologies Division
Featuring:
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NT200
Contamination and Clearance CheckPoint: Area
TM
PHYSICAL CHARACTERISTICS
Detector: ●
Permanently lled and sealed proportional detector (Ar, CO ○
Active window diameter: 44 mm (1.73 in)
○
Normal operating voltage: 1475V ○
Plate length: approx. 100V ○
Detector’s life length at working voltage: 10E11 pulses ○
Ef ciency (2p geometry): ○
60
- Co: 32%
241
- Am: 30%
Background count rate:
○
0.1 μSv/h: < 0.5 CPS 100 μSv/h: < 5 CPS -
Computer unit: ●
PC-104 form factor with 486 compatible processor ○
Memory card slot (MMC) for the update of storage programs ○
data transfert
2 RS-232 serial ports
○
External keyboard port ○
Display: ●
Resolution: 256 x 64 pixels ○
Display angle: almost 180° ○
CFL type white background light ○
screen saver in standby mode for increasing the CFL tube’s ○
life (picture of the measurement display)
The NT200 calibration is done
very easily with an automated
procedure.The activity of the
reference source, the measuring
time and the step high voltage
for the plates must be selected.
The NT200 automatically selects
the start and stop high voltage
and computes the detector response curve which is displayed
in real time on the screen.
MECHANICAL CHARACTERISTICS
Width: 186 mm (7.32 in) ●
2
)
Depth: 260 mm (10.23 in) ●
Height: 260 mm (10.23 in) ●
Lead shield thickness: 50 mm (1.97 in) ●
Total weight: 56 kg (123 lb) ●
The stainless steel sample holder can easily be ●
removed and decontaminated
●
The slide slot is coated with low friction PTFE for
smooth action
Stainless steel structure
●
OPTIONS
Keyboard and memory card option: the operator can add ●
comments for each sample, save it on the memory card and
then transfer it on his of ce PC
DC option: powered from 10-36V dc. Suitable for portable
●
use on trolleys or in cars/trucks
●
PCMCIA ash card reader
The NT200 can also measure paper fi lters samples from an air-sampling
pump. The operator can select between four preset air volumes. The
result is displayed in Bq/m³.
ELECTRICAL CHARACTERISTICS
Standard model: 90-264 V AC, 47-440 Hz ●
DC model: 10-36 V DC ●
The NT200 complies with the EC standard. ●
1 Nutronic trademark
Health Physics
Division
Mirion Technologies (MGPI) Inc
5000 Highlands Parkway
Suite 150
Smyrna Georgia 30082
USA
T +1.770.432.2744
F +1.770.432.9179
Since norms, specifi cations and designs are subject to occasional change, please ask for confi rmation of the information given in this publication.
Mirion Technologies (MGPI) SA
BP 1
F-13113 Lamanon
France
T +33 (0) 4 90 59 59 59
F +33 (0) 4 90 59 55 18
Mirion Technologies (RADOS) Oy
P.O. Box 506
FIN-20101 Turku
Finland
T +358 2 468 4600
F +358 2 468 4601
Mirion Technolgies (RADOS) GmbH
Ruhrstrasse 49
DE-22761 Hamburg
Germany
T +49 (0) 40 851 93-0
F +49 (0)40 851 93 256
www.mirion.com
144703EN-B
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