SCM170 Portable Surface Contamination Monitor

The SCM170 Portable Surface Contamination Monitor is designed for comprehensive radiation detection in nuclear facilities, environmental protection, public security, customs, healthcare, and industrial applications. This advanced instrument enables simultaneous measurement of alpha (α) and beta (β) surface contamination on various surfaces including floors, walls, tables, personnel clothing, and skin.

Key Features

New plastic scintillator detector requiring no inflation
Simultaneous α and β/γ measurement capability
β/γ background monitoring and compensation with adjustable alarm thresholds
Large 200cm² detection area
3.2-inch color LCD display with automatic backlight sensing
User-friendly interface with multiple display units (cps, Bq, Bq/cm²)
Lightweight, compact design for one-handed operation
Password-protected advanced menu system
Built-in nuclide library with customizable learning function

Technical Specifications

Main Unit Parameters
Detector	GM Tube
Measurement Type	X-ray, Gamma-ray (γ)
Display	3.2-inch Color LCD (320×240 resolution) with backlight
Sensitivity	≥2 cps (at 137Cs, 1 μSv/h)
Dose Equivalent Rate Range	0.1 μSv/h ~ 100 mSv/h
Accumulated Dose Range	0.01 μSv ~ 10 Sv
Energy Range	48 keV ~ 3 MeV
Relative Intrinsic Error	≤±15% (at 137Cs)
α/β Surface Contamination Probe
Detector	Composite Scintillator (ZnS(Ag) + Plastic Scintillator)
Detection Window Area	170 cm²
Detection Efficiency	α: ≥45% (2π geometry); β: ≥55% (2π geometry)
Counting Range	α: 0 ~ 99,999 cps; β: 0 ~ 50,000 cps
Background	α ≤ 0.1 cps; β ≤ 10 cps
Electrical Characteristics
Communication Interface	RS-485
Power Supply	Built-in rechargeable lithium battery
Operating Time	>24 hours continuous operation
Environmental Characteristics
Operating Temperature	-41°C to +50°C
Storage Temperature	-41°C to +50°C
Relative Humidity	≤90% at 35°C
Protection Class	IP65
Mechanical Characteristics
Dimensions	Probe: 330 × 125 mm; Main Unit: 170 × 80 × 30 mm
Weight	1150 g (total system)

Applications

Health and hygiene monitoring and assessment
Hospital nuclear medicine department monitoring
Environmental protection, customs, and border control
Counter-terrorism emergency response and law enforcement
Nuclear power plant routine monitoring and emergency response
Radiometric analysis of construction materials
Third-party testing institution capacity building

Compliant with GB/T 5202-2008, GB/T 8993-1998, GB/T 10257-2001 standards and various military environmental test requirements.

SCM170 Portable Surface Contamination Monitor