Agilent 34901A 20 Channel Multiplexer Module 34970A Two- and four-wire scanning Agilent 34901A 20 Channel Multiplexer Module 34970AKey Features & Specifications 20 Channel MultiplexerTwo- and four-wire scanning300 V switching60 ch/s scanningBuilt-in thermocouple reference junction Agilent 34901A 20 Channel Multiplexer Module 34970A