Negativ interferens forekommer ligeledes i NDIR-enheder, når den interfererende gas udvider absorptionsbåndet for den målte gas, samt i CLD-enheder, når den interfererende gas dæmper strålingen.
Negative interference occurs in NDIR instruments by the interfering gas broadening the absorption band of the measured gas, and in CLD instruments by the interfering gas quenching the radiation.