PR-111 Refractometer

The PR-111 In-Line Process Refractometer can continuously monitor and control the concentration of dissolved solids or soluble liquids giving you a temperature compensated reading which can be easily correlated to percent solids, or percent concentration.

The versatile PR-111 refractometer comes standard with a 4-20 mA output which allows you to record and automatically control your critical process. The PR-111 refractometer's small size and easy setup procedure can start saving you money right away!

Price: From $2,995





PR-111-D has our new digital panel meter installed on it with a resolution of .01 brix.

Price: From $3,395


pr-111 D





Stainless steel sensing head with sapphire prism Inert to essentially all liquids over the operating temperature range of the unit.
High intensity visible LED light source Long life. Low maintenance. Maximum uptime for your process line.
Silicon detector in sensing unit State of the art for accuracy and dependability.
Built in AGC loop Compensates for LED aging, guaranteeing maximum accuracy.
NEMA 4 head and console Water tight and drip proof for safety and long life.
4-20 mA output Send to a chart recorder or use to automatically control and adjust your process.
0-100% Analog Display Meter Easily correlated to your specific monitoring requirements. Be, S.G., Brix, etc.
Easy user controlled calibration and temperature compensation capability Allows you to tailor calibration and compensation to your specific process.
110/220 VAC input power No special wiring required. Can be used nearly everywhere.
1" Sensing head Can be used in a wide variety of process lines. Adapters for any size process lines can be built to your specifications.*


* Adapters are not included in the base price of the PR-111 and are priced separately based on individual requirements. We will need a sketch and/or description of your desired adapter mounting. We can provide a spool adapter with tri-clamps for pipe applications, doughnut for pan application or whatever is required for your particular application.


Measuring Range 0-100 Brix Equivalent or <1.3330 to >1.5435 Refractive Index
Span Minimum Span of 1 Brix, within a range of 0-100 Brix or Equivalent Refractive Index
Maximum Span of 100 Brix, within a range of 0-100 Brix or Equivalent Refractive Index
Accuracy Plus or Minus 5% of Span
Repeatability Typically better than 1% of Span
Accuracy(w/sm-1meter) Plus or Minus 1% of Span
Temperature Range -30 to 250 degrees Fahrenheit
Recommended Operating Temp +/- 30 degrees F. from customer selected nominal between 0 and 250 degrees F.
Compensated Range Greater ranges available at extra cost.
Electronics Enclosure Dimensions

Width - 7.09"

Height - 4.33"

Depth - 3.47"

Interconnecting Cable - 20'

Power Supply Cord - 10'

Standard Sensor Head DimensionsProbe DimensionsB
Power Consumption PR-111.............2.72 Watts @ 120 VAC
Power Consumption w/ SM-2 Smart Meter...........3.80 Watts @ 120 VAC
Available Power Supplies
24 VAC 9-18VDC 18-36VDC 120VAC 240VAC