OPTi Digital Handheld Refractometer - Automotive (AdBlue - DEF/Ethylene Glycol °C/Sulphuric Acid)

Regular price £240.00 Sale

This tri-scale digital refractometer is great for car mechanics and fleet managers wishing to check the concentration of Diesel Exhaust Fluids (commonly known as DEF or AdBlue®) that form part of a NOx reduction system in diesel powered vehicles. In addition, this particular OPTi digital refractometer not only displays %DEF but also comes with scales for measuring °C Ethylene Glycol (°C Freezing Point), ideal for measuring automotive coolants such as Antifreeze, and Sulphuric Acid for testing battery acid.

Scale A is set to AdBlue (DEF)

Scale B is set to (°C Freezing Point)

Scale C is set to Sulphuric Acid (battery acid) 

The OPTi Digital Handheld Refractometer - Automotive (AdBlue - DEF/Ethylene Glycol/Sulphuric Acid) 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’d prefer to programme your own OPTi you can purchase a Brix only model here. 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-A5-B6-C32

Scale A

Range: 0-40
Resolution: 0.1
Accuracy: ±0.2

Scale B

Range: 0 to -50
Resolution: 1
Accuracy: ±1

Scale C

Range: 1.000-1.501
Resolution: 0.001
Accuracy: ±0.003


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.