RKI Instruments / Riken Keiki Detector head, Hart over 4-20 mA transmitter, SD-1GH, 0-100 ppm acrylonitrile (C3H3N), SG-8521, AL 50 1,045.00SD-1GH-BNZ-500 Detector head, 4-20 mA transmitter, SD-1GH, 0-500 ppm benzene (C6H6), SG-8521, AL 100 ppm, part number: SD-1GH-ACN-H / RKI Instruments / Riken Keiki Đầu dò, Hart over 4-20 mA bộ phát tín hiệu, SD-1GH, 0-100 ppm acrylonitrile (C3H3N), SG-8521, AL 50 1,045.00SD-1GH-BNZ-500 Đầu dò, 4-20 mA bộ phát tín hiệu, SD-1GH, 0-500 ppm benzene (C6H6), SG-8521, AL 100 ppm, mã hàng hóa: SD-1GH-ACN-H