Vaisala HPP270 series probes for vaporised hydrogen peroxide

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Vaisala’s HPP270 series probes, which use PEROXCAP sensor technology to measure vaporised hydrogen peroxide in bio-decontamination applications, do not have a specified calibration interval. Although the typical calibration interval is one year, calibration intervals should be based on how the probe is used. This means that the key considerations are the duration and concentration of H₂O₂ exposure. Further, the requirements of the user’s internal quality management system must be met.

A novel feature of the HPP270 series probes is the ability to evaluate the sensors’ performance through the ‘Sensor Vitality’ value. This value is like a health check for the sensor. Accessed with Vaisala Insight software, sensor vitality is displayed as a percentage; Vaisala recommends replacing the probe when the value reaches ≤40%.

Vaisala’s recent webinar, ‘Vaporized hydrogen peroxide sensors: How to maintain measurement quality’, answered several questions on sensor vitality, and a few on basic use of the HPP270 series probes.

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