The need for regular maintenance is minimal, due to the construction with no moving parts, no mechanical adjustments and with a solid-state light source. The following rules apply:
- Keep the sensor head and the Indicating transmitter clean and dry.
- Check that the ambient temperature is not above +45 °C (+113 °F). The sensor head must not be too hot to keep a hand on.
- If your refractometer has prism wash, check that it works. For more information, see Testing prism wash.
- Follow preventive maintenance program, if any.