Sensors new in the box For patients weighing more than 40 kg Easy-to-use clip design Preferred application site is index finger Nellcor reusable sensors are a perfect match to your monitoring needs when patients have normal perfusion and pulse, and the risk of cross contamination is low. Reusable sensors are ideal for spot checks and short-term monitoring, although you must check the site every four hours during continuous monitoring, and relocate the sensor as necessary. Nellcor reusable sensors are compatible with many leading manufacturers of patient monitoring systems.