When using a handheld refractometer, does the ambient temperature matter?

Yes, ambient temperature can affect the accuracy of refractometer readings.

• For models without ATC (Automatic Temperature Compensation), it’s best to perform measurements in a stable environment around 20°C (68°F).
• For models with ATC, the device can automatically adjust for temperature variations, allowing accurate readings within a broader range—typically 10–30°C (50–86°F).

Important: When calibrating the refractometer, make sure the room temperature is close to 20°C (68°F) for best results.