Humidity Meters

This is "sensor saturation." In high-humidity environments, water molecules can become physically trapped in the sensor's dielectric layer. Calibration identifies if the sensor has been permanently damaged by condensation or if it simply needs a controlled "bake-out" to restore its range of motion.

Yes. Volatile Organic Compounds (VOCs), cleaning agents, or oil mists can "poison" the sensor membrane, leading to a permanent positive or negative bias. We test the sensor response against known reference salts to ensure chemical exposure hasn't compromised the hygroscopic material.

Hysteresis is the sensor's inability to return to the same reading when moving from "dry-to-wet" versus "wet-to-dry." We perform multi-point calibration to measure this lag, ensuring your meter provides consistent data regardless of whether the ambient humidity is rising or falling.

The relationship between wet-bulb and dry-bulb temperature changes based on barometric pressure. If your meter doesn't account for altitude or local pressure, the calculated Relative Humidity (%RH) will be wrong. We verify the meter’s pressure-compensation algorithms against absolute standards.

Yes. Dust or particulate buildup on the protective sinter filter slows down the diffusion of water vapor to the sensor. During service, we check the "T90" response time; if the probe takes too long to stabilize, we replace the filter and verify the sensor's speed to ensure it can track rapid environment changes.

If salt crystals (common in coastal or industrial environments) settle on the sensor, they act as a desiccant, artificially pulling moisture toward the sensor. Calibration detects these localized "micro-climates," ensuring your meter reflects the true room air rather than a contaminated probe tip.