Description
SentroProbe DR LS NIR
The SentroProbe DR LS NIR is a smart probe for the measurement of diffuse reflectance in the near infrared range in combination with a SentroPAT FO. Equipped with two redundant light sources, the sample is directly illuminated and a superior signal-to-noise ratio is achieved at a 5 mm spot size. The integrated illumination is connected to the SentroPAT FO with single core optical fibers, resulting in reasonable costs of installation even for lengths up to 50 m.
Internal Reference
The SentroProbe DR LS has an internal standard directly behind the measurement window. Connected to a SentroPAT FO
running with SentroSuite, the internal standard allows an automated referencing that is used to correct for any intensity
changes caused by light source aging or by variations in the ambient conditions. These comprehensive corrections enable
high long- term stability without the need for any external standardization.
Compliant Materials
The probe was developed with a strong focus for use cases in the processing of solid dose pharmaceuticals. Thus, materials
such as sapphire or high-grade stainless steel with a highly polished surface are used for all parts that will have contact
with the measured product. Certificates are provided with each probe to provide clear and traceable information on the
materials used.
Hazardous Areas
The SentroProbe DR LS is designed and certified for use in ATEX zone 20 / 21. This capability, the IP 65 compliance and
the easy to clean housing are essential aspects for the installation of this probe in the majority of used types of production
processes for solid dosage pharmaceutical products.
Probe Tip Heating
The surface area in contact with product can be configured with a heating element. This optional feature aids in self-cleaning
capabilities, especially for installations of the probe in a wet granulation process. Due to the slightly increased temperature,
the viscosity of the polymer-based binder remains on a relatively low level and, as a result, material doesn’t tend to stick to
the probe. The additional forces applied to the sapphire by the fast-moving material result in a clean window throughout
the process.
Smart Bulbs
The latest generation of the SentroProbe DR LS introduces bulbs which are recognized and identified automatically after a
replacement. Electronics in the bulb housing provides a unique identifier for the probe and the user is prompted for
any missing data or required action after the replacement of a bulb.