An ideal tool for etching pcbs in laboratory or small scale production applications this pcb etcher features a 17l acrylic etching tank with a suspended glass heating element and a diaphragm air pump housed in the pvc side enclosure the pump feeds a finely perforated air feeder tube which introduces minute bubbles into the etching tank aiding the etching process the etchers 100w heating element can be adjusted 38c via a thermostat the etching bath can be heated to approx 46c the wh