Proma 141030 PCB Bubble Etching Machine with Heater. Highlights & details. 1.7l acrylic etching tank (needs 400g etchant). Diaphragm air pump & bubble tube. 100W heater with thermostat. Adjustable board holder. Description. An ideal tool for etching PCBs in laboratory or small scale production applications. This PCB etcher features a 1.7l acrylic etching tank with a suspended glass heating element & 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 +38°C via a thermostat. The etching bath can be heated to approx. 46°C. The whole etching process is made exceptionally easy to monitor thanks to the completely clear acrylic tank. Boards up to 250 x 175 mm. can be held in the etchers adjustable PCB holder. Included in delivery. Adjustable board holder. Thermometer. Developer tray (320 x 285 x 105 mm). Conrad stock a wide range of accessories & spare parts for all Proma etching equipment. Technical data. Heater: 230 V/AC/100 W. Max. PCB size 250 mm. x 175 mm. Capacity 1.75 l. Ro HS compliant yes. Content 1 Units.