The PA100 Adult sensor is designed to work with the Rossax SA210, SA300 and SA310 pulse oximeters only.
It is the standard sensor which is already included when the SA210, SA300 or SA310 are bought.
How does it work? Press the clip at the end to open up the probe. Then place a finger into the probe and close. Connect the probe to the pulse oximeter device and it will be ready to use.