This fits your . Make sure this fits by entering your model number. Widely used in environmental protection, food, sanitation, geological prospecting, metallurgy, surface water, industrial wastewater, drinking water and other detection. It features high performance, pen shape, fast numerical stability and accurate calculation result. Adopts the LED digital screen display which is more clear and convenient to read data. With low voltage prompt, when the display is bleak and a battery sign appears at the top of the display, indicating that the battery voltage is insufficient, please replace the new battery as soon as possible. Do not mix the old and new batteries. Handheld designs, small size, light weight, easy to carry.