The 890 two-sided probe is used with a surface resistance meter to take volume resistance, point-to-point resistance, surface resistance and resistance-to-ground measurements. The 890 probes unique two sized design combines a concentric ring probe and a cylindrical disk probe into one easy to use testing device. The probe is made with conductive plastic containing silver particles. The 890 Probe Kit includes a stainless steel plate, insulative plate, blue guard cord, and a conductive carrying case.
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