Global printed circuit board (PCB) sales in 2015 were $58.6 billion and the average PCB bill of materials represents 3.2% of every electronic device sold. PCB’s mechanically support and electrically connect, electronic components using conductive tracks etched from copper sheets and non-conductive epoxy substrate. The most common etchants are ferric chloride, cupric chloride and hydrochloric acid blended with cupric chloride. At this PCB manufacturer, four day tanks are being monitored by EchoPod ultrasonic level transmitters. Hydrochloric acid is pumped into the day tanks and mixed with anhydrous cupric chloride, creating an acidic green solution. A standpipe has been installed to minimize the effects of vapor and agitation on the sensor as the batch is blended. The non-contact sensors deliver continuous level data to the PLC. EchoPod is reliable PCB etchant level measurement.