... IEC156. Transformer oil tester unit,oil testing device,oil detection set: 1.LCD displayer oil tester. 2.oil tester with Result printing ... for insulating oil. Series IIJ-II oil tester is special for testing insulating oil’s dielectric strength. IIJ-II ... fuel dispenser filter,fueling dispenser,waste management,water purification,vacuum pump filter,activated carbon filter,energy saving,oil reconstituted ...