搜索



赛默飞世尔科技为您服务
联系销售
联系技术与支持
相关产品列表
产品类别- 辐射测量和保护 >>放射性污染监测 >>
点击放大
SHM4A α手污染监控仪
This monitor meets the radiation protection regulaltions requirements for contamination measurements of hands in a convenient and repeatable fashion. 
  • Sensitive 260 cm2 scintillation probe
  • Autonomous - has no user controls
  • Assured hand positioning
  • Bright, clear user displays

The SHM4A is a single hand monitor for monitoring staff in plants where alpha-emitting radionuclides are processed.  Each monitor consists of an alpha scintillation detector with a ZnS(Ag) phosphor and thin radiation window protected by a robust grille, and electronics to generate the detector HV and to process the radiation signals.  Proper hand positioning is maintained by sensors which guide the user via a Recheck display light.  Additional lights are provided to indicate Ready, Monitoring, Clear, Alarm and Fault.

  • High sensitivity and uniformity
  • Long counting plateaus ensure excellent long-term stability
  • Good tolerance of high humidity
  • No loose cables
  • Easy to keep clean
  • Easy to decontaminate if necessary
  • Compact for installation at the workstation
  • Small independent hand and foot units offer greater flexibility in siting and let two users monitor simultaneously
Detector: :
- Detector material: : ZnS(Ag) on acrylic
- Window weight: : 1 x 1.2 mg/cm2
- Area: : 260 cm2 (205 x 127 mm)
- Grille: : Hexagonal 6mm mesh
- Protective film: : not required
- Position sensors: : Opto sensors
- 2 pi % Efficiency: : (using 100 cm2 sources on thye window)
241-Am, > 30%
U (nat), > 18%
- Background: : < 0.04 cps typically
Dimensions: : 385 (l) x 90 (w) x 125 (d) mm
(15.2" (l) x 3.5" (w) x 4.9" (d))
Weight: : 3.25 kg approx. (7.2 lb)
Indicators: : Ready (green)
Clear (green)
Monitoring (green)
Recheck (amber)
Alarm (red)
Fault (red)
Power on (red (LED)
Audio: : 87 dB at 1 m
Alarm: adjustable, 15 to 30 s. 3.3 kHz tone
Recheck: fast (10/s) interrupted tone
Clear: slow (1/s) interrupted tone until hand is removed
Internal settings: : Counts to alarm: 1 to 999, digital.
Count time: 1 to 99 s, digital
Potentiometers (internal): : Set HV, set sound volume, set alpha pulse amplitude threshold
Environmental: : +5 to +40 °C, up to 85% relative humidity, non-condensing
Power supply: : 85 to 264 V AC, 50/60 Hz, 20 VA
EMC conformity: : meets relevant CE and LVD requirements