Kɛ jɛn där 198o-ni̱ tɔ̱tɔ̱, kɛn  BioFET ti̱ kɔ̱kiɛn ci̱ kɛ ku thuŋ wɔ̱ nhiam, amäni̱ min laa ŋua̱a̱ckɛɛ ga̱th, ɛ la FET (GASFET), min laa ŋua̱a̱ckɛ ni̱ duäŋ FET (PRESSFET), kɛmikɔl in laa nyooth mac in ku laa (ChemFET), kɛ min laa nyooth ISFET (REFET), mi̱i̱th tin ci̱ rɔ̱ jak ɛ la FET (ENFET) kɛ min caa buɔ̱mdɛ gɛɛr in ku laa FET (IMFET).