Positape linear displacement transducers are said to have twice the life of cable-and-spool types. WB100M has stainless steel extension tape and IP 67/69K rating to withstand seawater and other harsh environments.  Available for measuring maximum strokes from 2000 mm to 10,000 mm. Comes with range of analog or digital outputs FSO error of ±0.05%.

ASM Sensors Inc., (630) 832-3202, www.asm-sensor.com