Thermo Orion Protective Cell Guard. For 013005MD, 013010MD, 013020MD, 013025MD, 013005A, 013010A, 0133030A, 013060A, 013005D, 013010D. Advanced design of the Thermo Scientific Orion DuraProbe virtually eliminates fringe field interference errors. Orion DuraProbe conductivity cells are durable and extremely accurate under a wide range of conditions. Material: stainless steel and plastic. Orion #: 080045.