How do solvents affect dissolved oxygen sensors?

Solvents can influence both dissolved oxygen measurements and sensor lifetime. Their effect depends on the solvent type, concentration, and compatibility with the sensor materials.

• Changes in oxygen solubility: Many solvents dissolve oxygen differently than water, which can lead to different DO readings and require application-specific calibration.
• Damage to sensor materials: Organic solvents can swell, soften, or damage membranes (luminophore), O-rings, seals, and optical coatings, reducing sensor lifetime.
• Reduced sensor lifetime: Aggressive solvents can accelerate aging and require more frequent maintenance or replacement.