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OPTi Auto A4 Digital Refractometer for testing AdBlue® and Ethylene °C


Order Code: 38-65.

£ 318.00 (£381.60 inc. vat)

Postage: £3.99 (£4.79 inc. vat) (based on a single item delivery in the UK)


This refractometer is ideal for car mechanics and fleet managers wishing to check the concentration of either Antifreeze or Diesel Exhaust Fluids such as DEF or AdBlue® that form part of a NOx reduction system in diesel powered vehicles.

Bellingham + Stanley designed OPTi digital handheld refractometers are manufactured in the UK as highly reliable premium quality instruments suitable for use in the harshest of environments across a wide application scope.

OPTi refractometers are constructed using the latest manufacturing techniques including stainless steel injection molding to construct the easy clean prism dish and ultrasonic welding to bond the housings; a rubberized switch membrane to further protect against moisture ingress and excess wear. The OPTi refractometer may be used to control the dissolved solids or blend ratios of numerous products from fresh fruit to industrial chemicals.

All OPTi refractometers incorporate a unique "AG Test Mode" that, unlike other makes of handheld refractometers that dictate the need to use short shelflife and hence expensive sucrose based solutions for verification, facilitates the use of long-life AG Fluid calibration materials without having to consider scale range or compensation type.

Latest OPTi software features High Ambient Light protection software that now monitors extraneous light, warning the operator of any detrimental effects that bright sunlight or floodlighting in cellars and warehouses may have on the reading by displaying -HAL- on the screen.

For convenience, the instrument displays directly in % DEF concentration (Diesel Exhaust Fluid) equivalent to % AdBlue® in Europe.

AdBlue® is a registered trademark of the VDA Verband der Automobileindustrie e.V.

Type: OPTi Dual Scale Refractometer
Range: 0-40 %DEF / 0 to -50°C Protection
Resolution: 0.1 %DEF / 1.0°C
Accuracy: ±0.2 %DEF / ±1.0°C


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