I am on my second year with one of these. They don't claim it to be waterproof but I haven't had any issues in over 20K miles. I just replace the AAA battery once a year and it keeps on working. I have the remote wired sensor under the beak of my 1200GS. It has a backlight that stays on all the time, I like that feature and ambient light doesn't impact the readability. It wasn't cheap but it is well made and made in the USA.
1970 Honda SL100 (my 1st bike in 1972)
1972 Yamaha Enduro 360 (loved this bike)
1977 Yamaha RD 250
1978 Suzuki 250TS
1982 Kawasaki GPZ 550
2007 BMW F800ST
2009 BMW R1200GS (Current)