BEP Tank Level Monitor Sender InterfaceTank Level Monitor Sender Interface The 600 TLM SIF signal converter module is used to convert from 10 180 ohm, or 240 33 ohm tank sender outputs, to a 0 5V output. BEP equipment that uses a 0 5 volt signal input includes the DCSM DC Systems Monitor, CZone Digital Switching Monitoring, and the 600 TLM tank monitor. Tank level monitor transmitter interface 600 TLM SIF signal converter module is used to convert 10 180 ohm or 240 33 ohm tank transmitter