The Rochester TLL352 Liquid Level Sensor is a heavy-duty unit that saves you time by self-calibrating to new or replacement fluid. Featuring a 1" thread connection with bolt hole configuration and no moving parts, the TLL352 suits most applications and features a long-service life. GTS stocks a large range of TLL352 in 4–20 mA output, but can supply other outputs in a variety of lengths as needed.