A semi micro balance is used to measure very small weights with high accuracy. Commonly used in pharmaceutical labs, biochemistry labs, and research centers. Students use it to weigh small quantities of chemicals or samples. It has a sensitive weighing chamber that must be kept clean. The sample is placed inside using forceps. Provides readings up to 0.001 mg accuracy. Useful for preparing precise solutions and reagents. Helps in quantitative analysis experiments. Ensures accurate measurement for lab research.