... .IEC156. Transformer oil tester unit,oil testing device,oil detection set: 1.LCD displayer oil tester. 2.oil tester ... state can continue to run.5. Anti-interference ability6. Detection with high precision7. Small size, light weight, easy operationsTechnical ... hepa filter,fuel dispenser filter,fueling dispenser,waste management,water purification,vacuum pump filter,activated carbon filter,energy saving ...