There are several types of disposable SpO2 probes available on the market, which can be broadly classified based on the type of sensor and the location where it is placed on the patient's body.
 

One common type of disposable SpO2 probe is the finger clip probe, which consists of a small sensor that clips onto the patient's finger. This type of probe is often used for continuous monitoring of oxygen saturation in patients who are hospitalized or critically ill.
 

Another type of disposable SpO2 probe is the earlobe probe, which is placed on the patient's earlobe. Earlobe probes are generally less accurate than finger clip probes, but they are easier to use and are often preferred for spot checking of oxygen saturation in less critically ill patients.
 

There are also disposable SpO2 probes that are designed specifically for use on neonatal patients or infants. These probes are smaller and more flexible than adult probes, and are designed to be placed on the patient's foot or hand.
 

In addition to the sensor type and location, disposable SpO2 probes can also vary in terms of the cable length and the connector type, which can affect the compatibility with different monitoring devices.