OPTi Digital Handheld Refractometer - Aviation (Refractive Index/FSII DiEGME)

OPTi Digital Handheld Refractometer - Aviation (Refractive Index/FSII DiEGME)

Regular price £240.00 Sale

This digital refractometer has scales set to Refractive Index and FSII DiEGME (ASTM D 5006).

Using the RI scale this OPTi refractometer can be used for a wide range of chemicals and their solutions including detergents and essences. However we’ve noticed that many customers within the aviation industry choose this particular model as a convenient and accurate way of determining the concentration of aircraft anti-icing fluids (glycol and additives) when mixed with water prior to applying to aircraft wings to prevent ice build-up during take-off.

To make things easier this OPTi Digital Handheld Refractometer also includes the FSII DiEGME (ASTM D 5006) scale - a standard test method for the measurement of fuel system icing inhibitors (ether type) in aviation fuels.

Scale A is set to Refractive Index (No temperature compensation – requires lookup table form the fluid manufacturer)

Scale B is set to FSII DiEGME (ASTM D 5006)

Scale C is empty: User Defined 

The OPTi Digital Handheld Refractometer - Aviation (Refractive Index/FSII DiEGME) scales are preselected at despatch, but may be reassigned using the scale selection method detailed here.

Portable, powerful, and ready to go

The OPTi® Digital Handheld Refractometer from Bellingham + Stanley puts a powerful, fully portable instrument in the palm of your hand. Powered by just 2xAAA batteries, the OPTi refractometer can take 10,000 readings in 50 common refractometer scales.

OPTi refractometers are made in the UK and feature a durable IP65 rated housing, a stainless steel prism dish which rapidly stabilises sample temperature, and a clear LCD display. All tri-scale OPTi refractometers have the ability to measure across the full 0-95 °Brix range.

To learn more about OPTi Digital Handheld Refractometers click here, or to read about Eclipse optical refractometers click here.

Refractometer Shop is proud to stock a series of OPTi Digital Handheld Refractometers with pre-selected scales to suit a wide range of applications. If you require a specific configuration and wish to buy in bulk please contact us today to see how we can help. 


Technical information

Product code: 38-01RS-A4-B26-C0

Scale A

Range: 1.33-1.53
Resolution: 0.0001
Accuracy: ±0.0003

Scale B

Range: 0.0-0.25
Resolution: 0.01
Accuracy: ±0.02

Scale C

Range: user
Resolution: user
Accuracy: user


Frequently bought with OPTi

AG 40 calibration fluid - £39.99

AG Fluids are aqueous solutions that cover the range 1.33-1.40 RI (0-40 °Brix equivalent) and have a shelf life of 12-months. Add to your order for free shipping within the UK.