Atago 3574 In-line Brix and Refractive Index Concentration Refractometer, PRM-100α, Refractive index (nD) : 1.32000 to 1.55700, Brix : 0.00 to 100.00% Measurement Range

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Stay a Step Ahead of Danger with In-line Process Refractometer 

This premium model features lab-grade accuracy across the full range of refractive index, Brix, or user-defined concentration scale. Data can be transmitted to a PLC for system automation. This model can be installed in the pipe lines of refill tanks, cleaning solution tanks, dilution, mixing, and blending tanks of manufacturing plants that produce liquid products such as the food and medicine industries, as well as those used in all kinds of industrial applications. This makes the unit capable of continuously monitoring items such as the refractive index, Brix, concentration and moisture, and mixture ratio of a variety of liquids. It has been enhanced with a wider than ever Brix measurement range of 0.00 to 100.00% and an accuracy of ± 0.05%


Measurement itemRefractive Index (nD), Brix, concentration (%),temperature.
RangeRefractive index (nD) : 1.32000 to 1.55700
Brix : 0.00 to 100.00%
ResolutionRefractive index (nD) : 0.0001 or 0.00001
Brix : 0.1 or 0.01%
AccuracyRefractive index : ±0.00010
Brix : ±0.05%
Temperature compensation5.0 to 100.0゚C
Wetted parts temperature resistance5 to 150゚C
High and low limit settingHigh and low control limits can be set with keys.
OutputRS-232C, DC4 to 20mA
Alarm outputOpen-collector output for high- and low-limit settings (alarm output).
CableDetection section - Display section (power supply 12V and RS-485)
Length: standard 15m (maximum up to 200m)


· RS-232C Output Cable (Standard 10m) : RE-65301

· Alarm Cable : RE-65305

* Calibration Certificate

Call 01463 830401 For Any Assistance

The PRM-100α works by measuring the light refraction between the prism on the detection section and the liquid running through the pipe where it is installed. This instrument can be mounted directly on the pipe or on a bypass. Process refractometers are indispensable in food, beverage and pharmaceutical plants for checking actual product, as well as serving to measure and control concentrations of industrial  solutions such as cutting oils, quenches, and washes. The unit reads samples in refractive index, Brix, or a user-defined concentration, and also displays temperature. Data outputs allow you to automatically control mixing ratios. 

The unit measures the refraction of light generated between the prism surface and a liquid sample. The PRM-100α is upgraded from the PRM-85 in the following aspects:

  • Wider than ever 0.0 to 100.00% Brix range
  • Improved measurement accuracy: Brix ±0.05%, nD ±0.00010
  • Two options for setting the minimum indication decimal place
  • Simple two-piece construction: detection section and operation display section
  • Easy-to-read colour display panel.

Simply attach the unit to a piping system to monitor food or beverage production, pharmaceutical production, industrial fluid, washing devices, dilution/mixing devices, etc. Continuously monitor water content and mixing ratio with successive measurements of refractive index, Brix, or concentration.

*The prism is specially designed to prevent solid materials from collecting on the surface, even after extended periods of use.

Programming a user scale is no longer a hassle!

Simply create a refractive index data table, using known
concentrations in a .txt file, and send it to the refractometer via RS-232C on any PC Win95 or newer.
Alarm function

Equipped with an alarm output function that transmits a
signal when pre-set high- and low-limit values are exceeded.
Improved thermo-sensor performance
The thermo-sensor quickly adapts to sudden temperature
changes, making stable measurement possible.
    • SKU
    • Commodity Codes
  • Range
    Refractive index (nD) : 1.32000 to 1.55700, Brix : 0.00 to 100.00%
  • Accuracy
    Refractive index : ±0.00010 Brix : ±0.05%
  • Type of Communication
    DC4 to 20mA Output
  • Installation Type
  • Use
    Brix and Refractive Index
  • International Protection Class
  • Manufacturer
    Atago Co Ltd
  • Country of Origin