Convex lens has been committed to the R & D and production of liquid level control products such as water level, oil level and material level for many years, which can meet the needs of OEM products for customers. Products are widely used in automotive industry, agricultural equipment, household appliances, kitchen equipment, industrial equipment, machinery, food, chemical industry, medical treatment, environmental protection, water treatment and other scientific and technological fields.        We always adhere to the service policy of "timely, thoughtful and high-quality", and aim to truly solve problems for customers and establish long-term cooperative relations.