DER EE Electrical Instrument Co., Ltd. (www.deree.com.tw) is a professional manufacturer of test and measurement instruments with decades of industry experience. We provide a comprehensive range of high-quality products, including digital multimeters, clamp meters, LCR meters, insulation resistance testers, ground resistance testers, light meters, phase sequence testers, digital panel meters, hall effect current sensors, current transformers, ammeter shunts, and temperature/humidity measuring instruments. Our products are designed for stable performance, reliable quality, and competitive value, serving customers in industrial, commercial, and educational markets worldwide.