The TruLine Cyanide Electrode FS is manufactured by YSI. TruLine Cyanide Ionic Strength Adjustor, 500 mL. It is an accessory for the following products: TruLine Cyanide Electrode Kit TruLab pH/ISE 1320 Laboratory Instrument MultiLab 4010-2W Laboratory Instrument MultiLab 4010-3W Laboratory Instrument