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Atago 3733 PEN-RI, Digital Dip Style Refractive Index Refractometer , PEN Series, Refractive Index (nD) 1.3200 to 1.5100 Measurement Range
One step closer to maximum efficiency
The PEN-RI has a measurement range of Refractive Index (nD) 1.3200 to 1.5100 which can be used to measure almost any sample.
Specifications
Model | PEN-RI |
---|---|
Cat.No. | 3733 |
Scale | Refractive Index Temperature |
Measurement Range | Refractive Index (nD) : 1.3200 to 1.5100 Temperature : 10.0 to 100℃ |
Resolution | Refractive Index (nD) : 0.0001 Temperature : 1℃ |
Measurement Accuracy | Refractive Index (nD) : ± 0.0003 (water at 20 ℃) Temperature : ±1℃ |
Ambient Temperature | 10 to 40°C |
Measurement Temperature | 10 to 100°C |
Measurement Time | 2 seconds |
Power Supply | 1 × Size AAA alkaline battery |
International Protection Class | IP65 Dust-tight and Protected against water jets. Prism head IP67 Dust-tight and Protected against the effects of temporary immersion in water. |
Dimensions & Weight | 16×3.8×1.8cm, 70g (Main Unit only) |
Patent for Design Registration No. ZL200830008615.4 (China), D127363 (Taiwan)
Patent pending in all other countries around the world.

One step closer to maximum efficiency
In optics, the refractive index of a material is a dimensionless number that describes how fast light travels through the material. It is defined as n={\frac {c}{v , where c is the speed of light in vacuum and v is the phase velocity of light in the medium.

![]() | = | refractive index |
![]() | = | speed of light |
![]() | = | phase velocity of light |
New Continuous Measurement feature to expand your current measuring methods. | ![]() |
![]() | Fast Measurements ! Non-homogeneous samples - no problem! Stir the sample while taking continuous measurements until the readings become stable |
Easy Continuous Measurements! Once the START key is pressed, measurements are taken every second | ![]() |
Features
![]() | Ergonomically designed for one-handed operation. | ![]() | Protection class of the PEN is IP65 (Prism head IP67). You can rinse off the sample by running water on the prism. The design allows the user to easily wipe off the sample. |
![]() | The Automatic Temperature Compensation function of the PEN enables you to take measurement readings regardless of the ambient temperature. | ![]() | Revolutionary new feature ELI* *External Light Interference (ELI) - Patent Pending. |
![]() | Convenient Storage case. | ![]() | High temperature sample can be measured. *Do not dip the instrument directly into a boiling pot to measure; instead, place the liquid in a separate container and measure. |
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Measurement RangeRefractive Index (nD) : 1.3200 to 1.5100
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Resolution0.0001
-
Measurement AccuracyRefractive Index (nD) : ± 0.0003 (water at 20 ℃)
-
Measurement Temperature (°C)10 to 100
-
Ambient Temperature (°C)10 to 40
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UseRefractive Index
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International Protection ClassIP65, Prism Head is IP67
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ManufacturerAtago Co Ltd
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Country of OriginJapan
Food Seasoning / soy sauce / sauce / soy milk / Sauce / jam / honey / bean paste syrup / oil / fat etc. | ![]() | Beverage Fruit drink / soft drink Carbonated drinks | ![]() |
Eating out When stewed To check the end point! Ramen soup / Mentsuyu Sauce / bowl sauce, etc. | ![]() | Agriculture Fruit / vegetable / leaf juice Stem juice / root juice | ![]() |
Salt Pickling liquid and seawater For concentration check! Saline / seawater / pickle preparation liquid | ![]() | Metal Processing Of cutting oil For concentration control! | ![]() |
Chemical Of various solutions For refractive index management! Cleaning solution / antifreeze solution / brine solution Snow melting agent / cosmetics | ![]() | Medical Urine / serum | ![]() |
Thank you for choosing an ATAGO product.
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