Don't let failing oxygen sensors compromise your engine's performance. O2 sensors are critical to emissions control on your car, SUV or truck. As the name implies, the O2 sensor (also called an ...

Abstract: A microfluidic electrochemical sensor is fabricated for the measurement of chemical oxygen demand (COD) in surface waters, such as lakes and reservoirs. An Au interdigital electrode is used ...

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In my case they sent me replacement sims when I phoned them thinking they would try changing the plan but it didn’t. Click to expand... You should try to phone them again. They told me I needed to ...