电导率是一个重要的材料属性，不仅对金属传导电流的能力，也对其成分、微观结构和机械性能提供信息。使SIGMASCOPE® SMP350可以简单快速并精确地测定电导率。SIGMASCOPE® SMP350 根据涡流相位法DIN EN 2004-1 和 ASTM E 1004 测量电导率。 这种方法允许无接触测量，即使隔着油漆或者厚达500μm的塑料涂层，这种方法也几乎不受表面粗糙度的影响。

Probe FS40HF探头：

Probe FS40HF探头根据DIN EN 2004-1和ASTM E 1004来测量非磁性金属的电导率。由于集成了温度传感器，所有探头都适合进行温度校正的测量，并自动显示标准化为20°的电导率值 C（68°F）。 所有探头均在高频下工作，因此只能在低材料深度下进行测量。 使用的测量方法可以进行无接触测量，也可以在非导电面漆（如漆面或塑料盖）下进行测量。

        • 近地表测量
        • 薄板的测量
        • 关于薄涂层的磨损程度的判定
        • 热喷涂层评估

Probe FS40HF 技术参数
探头设计:	Axial single tip probes with fixed measuring system
应用:	非磁性金属的电导率
测量范围:	5 ...108 %IACS
探头频率:	1000 kHz and 2000 kHz
误差:	1... 100 %IACS: ≤ 1 % of 标称值
重复精度:	1000 kHz: ≤ 0.35 %IACS of 读值 2000 kHz: ≤ 1 %IACS of 读值
Influences:	取决于材料和探头使用频率
Material Thickness Th:	No measurement deviation within the trueness for Th ≥ Th min Depending on the electrical conductivity of the material the minimal material thickness Thmin can be computed according to the following equation:
		f = Probe frequency in Hz σ = Electrical conductivity of the material in %IACS K ≈ 0.9, specific probe factor
	Examples For probe frequency 1000 kHz 0.18 mm (0.007") for 100 %IACS (Cu) 0.25 mm (0.010") for 51.7 %IACS (Al) 1.35 mm (0.053") for 1.72 %IACS
Edge Distance (R), Specification From Probe Tip Centre:	For all probe frequencies - No measurement error within the trueness as of R ≥ 7 mm / 0.28" Probe needs a minimum of R = 7 mm / 0.28"
		Measuring spot in the centre of the circular surface
Edge Distance (X), Specification From Probe Tip Centre:	For all probe frequencies. No measurement error within the trueness as of X ≥ 7 mm / 0.28"
	Measuring spot
Curvature (R), measurement deviation from the nominal value with reference to master calibration on flat surface:	For 1000 and 2000 kHz Measurement error ≥ 10 % for R ≤ 12.5 mm / 0.49". Probe needs a minimum of R = 1 mm / 0.04"
	Measuring spot
Distance Compensation (Measurement through a lacquer or plastic coating):	0…500 μm / 19.54" Max. Measurement deviation: 2 % of reading, Thickness of an air gab, plastic foil or lacquer coating.
允许操作环境温度	-10°C...+40°C / +14°F...+104°F
表面温度:	max. +40°C / +104°F
防潮:	No
针尖材质:	Plastic
针尖更换:	No
测量方法:	相敏涡流法
标配:	Probe, measurement prism (grip ring 2), Cu standard approx. 100 %IACS
尺寸:	Cable length: 1.5 m / 59.06", other cable lengths on request