Differential Pressure Sensors SDP800 Series
SDP800 – Proven and Improved
Differential pressure sensors of the SDP800 series are the reliable solution for precise air flow measurement in most demanding but cost-sensitive HVAC applications, such as VAV controllers, burners, heat recovery systems and filter monitoring.
The SDP800 differential pressure sensors are based on the next generation of the CMOSens® sensor chip and consequently utilize the successful features of the SDP600 series. They are the result of more than 15 years of experience in measuring air flow in tens of millions of patients, car engines and HVAC systems. The sensors of the SDP800 series can easily be integrated due to their proven form factor. This next-generation sensor chip offers extended functionality, smart averaging functions and multiple measurement modes. Like all Sensirion differential pressure sensors, those from the SDP800 series are characterized by their outstanding accuracy and long-term stability, together with no zero-point drift.
- Manifold or tube connection
- 125 Pa or 500 Pa
- Digital (I2C) or analog output
The digital version is highly versatile and features adaptable measurement speeds of up to 2 kHz, multiple measurement modes (triggered / continuous mode) and smart averaging functions. The version with analog ratiometric voltage output is configurable to either linear or square root by a separate pin. While the SDP80x is intended for a direct threaded connection to a pressure manifold via O-ring sealing, the SDP81x is designed for a tube connection.
Like all of Sensirion’s differential pressure sensors, the SDP800 series is based on Sensirion’s patented CMOSens® Technology, which combines the sensor element, signal processing and digital calibration on a small CMOS chip. The differential pressure is measured by a thermal sensor element using the flow-through principle. Thanks to this, Sensirion’s CMOSens® differential pressure sensors outperform traditional piezo-resistive membrane sensors in terms of sensitivity at low differential pressures, offset drift and hysteresis as well as position sensitivity, shock resistance and temperature variations.
- No offset, no zero-point drift, hysteresis free
- Outstanding accuracy and long-term stability
- Pressure range of up to ±500 Pa (±2 inch H2O / ±5 mbar)
- Excellent accuracy and repeatability (even below 1 Pa)
- Fully calibrated and temperature compensated (-20° C to +85° C)
- For air and non-aggressive gases
- Suited for standard wave soldering
The SDP800 Series
Depending on your specific requirements, you can choose between different sensor versions. The individual characteristics are displayed below:
|Version||500 Pa||125 Pa||500 Pa||125 Pa|
|Pressure range (bidirectional)|
|Key features||Proven form factor with best performance||Robust and accurate with analog output|
|Power supply||3 to 5.5 V|
|Accuracy of measured value||3%|
|Lowest detectable pressure||< 0.02 Pa||< 0.01 Pa||< 0.02 Pa||< 0.01 Pa|
|Measurement speed||0.5 ms||5 ms|
|Calibrated for||Air, N2|
|Gas compatibility||Air, inert gases|
The EK-P5 evaluation kit offers easy, quick and cost-efficient evaluation and testing of the SDP800 series differential pressure sensors.
The kit consists of a SDP810 sensor that is easily plugged into a PC via an USB cable. With the help of the software available online for download, the differential pressure sensor can be tested under realistic conditions by following the simple installation steps. The kit can be purchased directly from Sensirion distributors
Connecting Caps for SDP800 Series
For the SDP800 series differential pressure sensors, Sensirion offers caps as an add-on component. The caps are especially suited to applications where the sensor is not PCB-mounted but connected with a cable. Here, the caps serve as a connector and enable an easy and secure connection between the cable and the sensor. It is compatible with all SDP800 sensors and the DuraClik™ Wire-to-Board Receptacle Housing.
Efficient Gas Flow Measurements in Bypass
Measuring gas flow in applications requiring high precision and cost-efficiency is a challenge. Experience in recent years has shown that microthermal flow sensors are superior to other technologies. Industries with exacting demands, such as automotive and medical technology, have recognized that microthermal gas flow sensors give their products decisive advantages. These manifest themselves in high long-term stability and precision even when flow rates are minimal, and the sensors’ suitability for cost-efficient and reliable mass production.