GL3188 Ozone Air Purifier Price BD | GL3188 Ozone Air Purifier Price in Bangladesh. GL-3188 ozone generator air purifier produces 400mg / h ozone for water, food, home and office use. Bacteria, viruses and parasites in any water are destroyed by ozone. It has carrier water's ozone technology, which consists of a single small device that will sanitize and refresh the workplace. It has six levels that can be adjusted from 5mins to 30mins and users can customize their working hours as needed.