What is the fine-grained topic of the following text: Heartbeat Technology is now available as an option in Liquiline CM442, CM444 and CM448 transmitters and all DIN-rail mount versions, and works with Memosens pH and conductivity sensors, and Liquistation CSF34 and CSF48 samplers. Only return the topic.
Heartbeat Technology in Liquiline transmitters and Memosens sensors