Dear Sir/Madam, This is WongsakNamphon from TH. I'm looking for products with the following specifications: I want Water Meter with rs485 Output use 1/2 diameter pipe for retail shop My project Use water meter keep water unit use of retail shop.Building have 50 retail shop. I develop third party software connect with water meter to keep data use and record in database. Please let me know product picture, product detail, or specification and unit price for 50pcs. Water Meter Pipe 1/2 Output RS485 Best Regards Wongsak.N Show More