A free standing tank for production of of PCBs photo-resist coated or standard copper clad boards up to 320x260mm in size. Heater and thermostat are built-in and a pump forces air through two bubble bars to provide efficient and even etching. Separate splashproof switches control mains power and the pump, and a neon indicates heater operative. The temperature is set by adjusting the variable thermostat control knob. (Optimum for ferric chloride 40-45°C). Supplied complete with a syphon and integral 2 m mains lead with a sleeved 13A mains plug, fused at 5A, and comprehensive instructions. Mega model PA104 (500-003). RoHS exempt