Sensirion has launched new versions of its acclaimed SDP600
series, which are able to perform certified failsafe measurements. The digital
SDP600 differential pressure sensors are already used successfully in medical applications
and feature excellent long-term stability as well as the highest degree of
sensitivity and accuracy, especially at very low pressure differences. The new
models, SDP620, SDP621, SDP630, and SDP631, now additionally allow verification
of the measured values. Thanks to their pre-certification, the sensors can be
easily integrated into failsafe control systems; this is particularly relevant
for applications with high safety requirements.
The new types of differential pressure sensors can be
configured to provide special test patterns for error checking by an external
microprocessor. This makes it possible for the sensors to achieve measurement
of differential pressure and mass flow values to Class C safety level, provided
that the test patterns are executed properly. Specifically, the SDP620, SDP621,
SDP630, and SDP631 comply with Directives EN 12067-2:2004 “Gas/air ratio
controls for gas burners and gas burning appliances – Part 2: Electronic types”
and EN 13611:2007 “Safety and control devices for gas burners and gas burning
appliances – General requirements.”
The new models are tailored to different hardware designs
and measurement applications to allow customers a high level of flexibility
when integrating. While the mass flow temperature compensated SDP621 and SDP631
are optimally suited for measuring mass flow, the SDP620 and SDP630 sensors
output the true differential pressure value. Furthermore, the SDP620 and SDP621
sensors 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.
