The SDP600 series of differential pressure sensors by Sensirion has been extended with versions which allow the verification of the measured values in order to perform certified failsafe measurements. Thanks to their pre-certification, the sensors SDP620, SDP621, SDP630 and SDP631 can be integrated into failsafe control systems. These models can be configured to provide special test patterns for error checking by an external microprocessor. This makes it possible to achieve measurement of differential pressure and mass flow values to Class C safety level, provided that the test patterns are executed properly. The sensors are tailored to different hardware designs and measurement applications to allow a high level of flexibility. While the mass flow temperature compensated SDP621 and SDP631 are suited for measuring mass flow, the SDP620 and SDP630 output the true differential pressure value. The SDP620 and SDP621 are intended for a direct threaded connection to a pressure manifold with O-ring sealing, while the SDP63x models are equipped with standard hose connectors.
Differential pressure sensors
