Greisinger glf 100 rw conductivity measuring instrument greisinger glf 100rw p the greisinger glf 100 rw is a robust conductivity meter with a stainless steel measuring cell 12mm diameter and integrated fast response temperature sensor p p the meter is ideal for testing and checking of pure and ultra pure water boiler water ion exchangers distilled water deionised water demineralised water and desalinated water p greisinger glf 100rw conductivity meter