Filter Protects Small Digital Humidity Sensor

It takes a variety of components to make a sensor appropriate for targeted applications and environments. To protect Sensirion’sSHT2x humidity and temperature sensor from water, dust, dirt and various contaminants, the SF2 filter cap is such a component.  Made of PBT (Polybutylene Terephthalate) the filter cap has an integrated filter membrane. With a filtration efficiency of 99.99% of all particles >0.1μm, the filter cap is designed to keep response time low. The SF2 fits exactly to the external dimensions of the SHT21 and also serves as an adaptor for mounting the humidity sensor directly into the wall of housing.  The use of an o-ring seal results in a waterproof mounting solution that allows protection according to IP67 to be achieved.

For more information on Sensirion’s SF2 filter cap, click, here.

Sensirion SDP600 Differential Pressure Sensors Now Include Failsafe Versions

Already used successfully in medical and HVAC applications, the newest Sensirion differential pressure sensor models, SDP620, SDP621, SDP630 and SDP631, allow verification of the measured values.

The failsafe sensors can be configured to provide special test patterns for error checking by an external microprocessor. With the right test pattern configurations, it is possible to measure differential pressure and mass flow values to Class C safety level, complying with Directives EN 12067-2:2004 and EN 13611:2007 for gas burners and gas burning appliances.

The mass flow temperature compensated SDP621 and SDP631 target mass flow measurements and the SDP620 and SDP630 sensors output the true differential pressure value. With failsafe certification, it is not necessary to use two redundant sensors to meet high safety requirements so total design cost can be reduced.

For more information about Sensirion SDP600 series differential pressure sensors, click here.

For more information about Sensirion failsafe differential pressure sensors, contact info@sensirion.com.

Sensirion Flow Meter Addresses Milliliter Applications

For flow rates below 100 ml/min, Sensirion’s SLQ-HC60 flow meter provides a reliable and inexpensive solution for automated systems and other applications. Using its CMOSens Technology that integrates signal conditioning circuitry and microelectromechanical systems (MEMS) structures in a CMOS microchip, Sensirion’s SLQ-HC60 flow meter provides a 0–10V analog output signal from a supply voltage of 24V. With typical repeatability of 1 to 2%, the typical response time is less than 50 ms. The flow channel of the sensor has an inside diameter of 1.8 mm that allows a connection to 1/8” or 3-mm plastic hoses via threaded couplings.

For more information about the Sensirion SLQ-HC60 flow meter, click here.