StellarNet Inc. offers a low-cost, rugged, high-throughput retro-reflection probe that is ideal for use in an industrial process environment. It is capable of operating at temperatures from -50°C to 300°C and at pressures up to 3000 psi.  This outstanding performance is achieved by using Kalrez® O-ring seals. The retro-reflection probe is available in fixed path lengths of 2, 5, 10, 20 and 50 mm. The optical fiber is 400-micron core fused silica and is clad in stainless steel armor. If needed, the armor can be sealed with Teflon® to provide a barrier to the environment. A four-inch extension tube is added to the rear of the probe to allow direct insertion into a process stream. The extension tube can be adapted to the customer's process connection requirements. The retro-reflection probe is available in both UV and NIR versions, as dictated by the customer's application needs. 

TECHNOLOGICAL INNOVATIONS  The retro-reflection probe incorporates a back reflecting aluminum mirror for high light return in the UV region. Using this design, the sensitive aluminum layer is back-coated on a silica disk with a protective MgF2 overcoat. The mirror is then sealed into the bottom of the probe. Both the mirror and the collimating lens are held in the stainless steel housing with Kalrez® O-rings. All wetted surfaces are silica, stainless steel or Kalrez®.  For more demanding applications, the optical surfaces may be over coated with diamond-like carbon film.*  This film improves corrosion resistance and reduces fouling.  

* Visible and NIR use only.