Sampling System

Sentry Sampling System

Sentry process sampling systems enable you to have controlled real time data to monitor your process. With this you can make a careful analysis of your quality which is so important in modern processing. By effectively conditioning, sampling and measuring gas, steam, liquid, slurry, powder solids or water within your production environments, you can control your process with confidence.

Steam Sampling System

Steam sampling is critical in a process plant because steam is a required utility for most chemical, petrochemical and refining processes. Without it, molecules don’t get cracked, reactors don’t get heated and hopes for high yielding chemical processes don’t materialize. Steam impurity may cause operational issues with turbines and other process equipment, corrosion of process components and/or scaling of metal surfaces. To mitigate these risks, analysis of process steam and condensate is an important aspect of any chemical processing or refining operation. Impurities in these systems such as silica, sodium or deviations from target pH values can wreak havoc on a plant’s operations. On-line analysis of sodium and cation conductivity is commonly performed to monitor the condition of process steam.

In Tank Probe Process Refractometer

Measure concentrations of sugars/Brix, acids, alkaline solutions, alcohols, hydrocarbons, solvents, and various other solutions directly in pipelines and tanks, in production transport and perform quality control in sugar, chemical, petrochemical, and other industries.


The Vaisala Polaris PR53GP probe process refractometer is the concentration measurement solution of choice for sugar, chemical, petrochemical, and other industries. Optional cooling cover is available for processes where extreme temperature is common. 



Typical applications include crystallizers, wet scrubbers, reactors, transport pipelines, and blending and distillation

Indigo transmitters for Vaisala refractometers

Data logging, wash control, trends, settings and measurement parameters


Vaisala Polaris combined with Indigo520 offers compelling features for all users and are a standard power couple for applications and installation positions with prism wash system.


Access data and different features through the Indigo520, including data logging, wash control, settings, measurement parameters and Indigo service updates to Indigo520. 



The Indigo520 for process refractometers offers versatile system connectivity by two selected analog or digital inputs for process refractometers and other Indigo compatible probes, and four configurable analog outputs to alarm relays, and ModBus TCP/IP digital protocol.

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