https://www.mktester.com/transformer-oil-tester/oil-trace-moisture-tester.html
product description:Oil trace moisture tester This instrument is able to work more reliably and conveniently by using the most advanced control circuit and 32 bit embedded microcontroller processor as the master control core and utilizing embedded mini operating system.
Oil trace moisture tester (2)
Technical index:
Titration method:Coulometric titration(Coulomb analysis)
Display:Color LCD touch screen
Electrolytic current control:0~400mA automatic control
Measurement scope:3ug~100mg
Sensitive valve:0.1µg H2O
Accuracy:10µg~1000µg±3µg
More than 1mg but not greater than 0.3%
Printer:Miniature thermal printer
Power supply:220V±10%、50Hz
Power:< 40W
Ambient temperature:5~40℃
Ambient humidity:≤ 85%
External dimension:340×295×155
Weight:About 5.5kg