The best replacement for probe is primer.

The best alternatives to probe are rated as following:
★★★★★  primer
★★★★★  pulse start
★★★  mx6
★★★  sensor
★★★  ict
★★  zealot
★★  scv
★★  probe
★★  passive probe
★★  prove
★  bath sonicator
★  meat thermometer
★  scat
  gyn probe
  bed of nails
  petai
  pro pointer
  ph probe
  multimeter
  not to probe
  astroglide
  gen probe
  vascular probe

Your alternative for probe is not listed? Suggest!
Speaking about probe, one probably shouldn't forget about temperature sensor.

Other search terms related to probe and their ratings are:
★★★★★ temperature sensor
★★ meter
You have in mind a companion for probe and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of probe in all years. Click on graph for more.
probe
primer
pulse start