Profile: Zhuhai Dshing Import&Export Co.,Ltd, is a manufacturer of geological instruments, petroleum instruments and laboratory instruments. DSHD-3009II metal detector is a fully automatic a turn on and go detector. This detector features zero Motion targeting Function for precisely locating a target, LED view meter, which can be used in a noisy area, where it is difficult to hear and all metal push key switch made of metal & metal identifying switch. Rotational viscometer is designed and made as per T0625 in the industry standard JTJ052 specification. It has a very wide range of functions. First of all, it is suitable to determine apparent viscosity of highway asphalt at a temperature from 45 ℃ to 200 ℃ as per Brookfield viscometer rotation methods. And then, it can be used to determine construction temperature for bituminous mixture as per viscosity-temperature curve. At last also it can be used to determine viscosity of hot melt adhesive, oil grease, paraffin and high polymer. It can be widely used in cosmetics, food, pharmaceutical, dopes, chemical, and other industries.