The Primex OneVue Differential Pressure Sensor employs a precision sensing element for deriving readings. The sensing element is supplied by Sensirion AG and each element is individually calibrated and tested by reference equipment that is calibrated by an ISO/IEC 17025 approved laboratory. The Sensirion Calibration Certification details the methods used for calibration and the manufacturer lot identification is printed on the bottom side of a Primex' sensor housing.
The Sensirion data sheet specifies an offset stability of < 0.1 Pa/year or 0.102 mm H2O/year and features excellent long-term stability. With the small amount of drift and lack of clear regulations relating to the quantification of differential pressure, the standard for replacement is primarily dependent upon on the sensor application. As the manufacturer, a Primex OneVue Differential Pressure Sensor can remain accurate for up to 10 years from the first date of use for most applications.
Application examples and drift stability impact (offset stability specification)
Monitoring negative pressure anteroom at -15 Pa and readings are typically -16 Pa or more.
The estimated sensor life is 10 years before drift would affect reading accuracy.
Monitoring any amount of positive pressure and HVAC settings have typical readings at +0.4 Pa.
Due to the yearly drift stability impacted by the monitored environment and extent of use, consider replacing the sensor more frequently,
To request a replacement recommendation for your application, please contact Katie McMillan.