Why was the full-scale range on 10.6 PID sensor changed from 6,000 ppm to 4,000 ppm?

Q: Why was the full-scale range changed from 6,000 ppm to 4,000 ppm on RKI’s 10.6 PID sensor?

A: Riken Keiki engineering tested RKI’s 10.6 PID sensor readings at the top range, and discovered readings on the 10.6 PID sensor consistently max out at 4,500 ppm instead of 6,000 ppm. Because of this, the 6,000 ppm full scale was potentially misleading. The company set the new full scale to 4,000 ppm to better reflect the sensor’s actual reliable measurement range.

Q: When was this change made?
A: The decision was made about one to two years ago.

Q: What part number changes were made?

A: The as-sold replacement sensor part number changed from PID-002L to PID-002LA when the full scale was updated to 4,000 ppm.

Q: Does this change affect sensor performance?

A: No — the change simply aligns the displayed full-scale range with the sensor’s actual measurement capability, improving accuracy and reducing potential confusion.