Test Range of 4 SENSORS Kits The 4 SENSORS test, an enzyme-linked receptor-binding assay that detects the -lactams group & Tetracyclines group & Streptomycin group & Chloramphenicol group , penicillin G, ampicillin, amoxicillin, oxacillin, cloxacillin, dicloxacillin, nafcillin, cefquinome, cefacetrile, cefalonium, cefazolin, cefoperazone, cephapirin, ceftiofur, Tetracycline, Doxycycline, Oxytetracycline, Chlortetracycline, streptomycin, dihydrostrptomycin and chloramphenicol in raw, commingled cow milk at or below established tolerance and/or safe levels.