Dictionary entry overview: What does sensitize mean? â¢ SENSITIZE (verb) The verb SENSITIZE has 4 senses: 1. make sensitive or aware 2. cause to sense; make sensitive 3. make sensitive to a drug or allergen 4. make (a material) sensitive to light, often of a particular colour, by coating it with a photographic emulsion Familiarity information: SENSITIZE used as a verb is uncommon.
1 As such, a substance with an ORP reading of +400 mv is 4 times more oxidizing than a substance with an ORP reading of +100 mv.  A negative ORP reading indicates that a substance is a reducing agent. The lower the reading, the more anti-oxidizing it is.
Do NOT be suckered into thinking that a home swimming pool ORP meter is good because it's expensive. ORP testing is slow and is thrown off by the presence of many other chemicals. Hands down, your everyday pool test kit should be OTO based. Simply put, it's the most trustworthy way to test!