The product titled ‘EXTERNAL LIQUID SENSOR – CH5004’ is a device designed to detect the presence or absence of liquid in a particular area or container. This product is sold individually, denoted by ‘EACH’. It is an essential tool in various fields such as healthcare, manufacturing, and scientific research, where precise liquid level monitoring is crucial. Please note that additional details about this product’s specific features and applications may vary, so it’s recommended to refer to the product’s packaging or contact the manufacturer for more information.