Joyelectric International is a professional China sf6 gas density meter distributor and agent among those well-known such manufacturers and suppliers, welcome to order sf6 gas density meter products from our factory and company.Patent number: ZL201120391129.1Patent number: ZL201420593673.8 If you would like a quotation or further information on this product, please fill in the form below and we will reply to you within 1 working day. Thank you for your interest to our products.