This sensor is for measure SPO2 level through rectal insertion
fully compatible with Mindray PM-50vet, PM-60vet , pm-9000-vet , mec-1200vet , Edah Ve-h100b , Nellcor veterianry oximeter or monitor .
It has 9 pin connect so it will be compatible with 7 pin old model , also work great with 9 pin oximax model
The sensor part (black part ) is about 1-1/4 inch long . the whole insert is about 3 inch long .