Unisense Clark Type/ Amperometric Oxygen Microsensor

Unisense OX-25 Clark Type/ Amperometric Oxygen Microsensor

Unisense H2S-N-1231 Clark Type II/ Amperometric Hydrogen Sulfide Microsensor

Unisense OX-25 Clark Type/ Amperometric Oxygen Microsensor w/ Extra Connectors

Halverson Sterilizer medical or dental 1914 antique Chicago Sterling vintage

Vtg Halverson Sterilizer medical dental 1914 Chicago Sterling - Tray Rises!

BAS LC-4C Amperometric Detector Tested Working