Advance Tech Service [P] Ltd. Offers Pencil Type Ion Gun with Proprietary Self Adjust Balance. Advance Tech Service [P] Ltd. Received EFY Award in Soldering Desoldering category. Pencil Type Ion Gun with Proprietary Self Adjust Balance is a light weight product and has in built piezoelectric transformer. It has low EMI generation and longer performance life. Pencil Type Ion Gun with Proprietary Self Adjust Balance is ideal for operations where ions and air come out on press of trigger.