... 3.plating nickel,zinc,silver,gold etc. Water Temperature Sensor ·Surface: polishing,nickel /zinc/chrome plated , phosphating ... assurance in accordance with ISO9001:2008·Water Temperature Sensor are produced according to customers' drawing or ... ·projecting apparatus ·microscop.Absolute digital caliper ·roughness tester ·concentricity tester etc.Product material: carbon steel,cooper,iron,aluminium ...