CFR › Title 21 › Part 870 › §870.205021 CFR §870.2050Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Identification. A biopotential amplifier and signal conditioner is a device used to amplify or condition an electrical signal of biologic origin.(b)Classification. Class II (performance standards).