LDE

New digital ultra-low pressure sensors from 25 Pa offer very high offset stability and accuracy
 
First Sensor presents the new Sensortechnics LDE ultra-low pressure sensors with ranges from 25 Pa (0.25 mbar) full scale. The digital sensors use a special compensation technology to achieve excellent offset stabilities better than 0.1 %. These flow-based differential pressure sensors include a microcontroller for precision digital signal conditioning and accomplish very high accuracies. A digital SPI bus and analogue output is available at the same time.  
 
The LDE sensors for air and gases are based on a very sensitive thermal mass flow measuring principle and provide high-resolution signals. The innovative Sensortechnics technology integrates the flow channel including the sensing elements within the silicon sensor chip. Due to this extreme miniaturisation on chip level the gas flow through the LDE sensor is decreased by several magnitudes compared to conventional flow-based pressure sensors. The sensors are therefore highly immune against dust contamination and humidity and allow the use of long connecting tubes and input filters without losing their calibrated accuracy. Further, complex housing constructions are not required thus providing small and cost-effective devices for space saving PCB mounting.  
 
The digital LDE sensors are ideally suited for highly accurate and long term stable ultra-low pressure measurement in many medical, HVAC and instrumentation OEM device applications.  
 
Important features of the new LDE series:  

• Ultra-low pressure ranges from 25 Pa (0.25 mbar) full scale
• Very high offset stability and accuracy
• Digital SPI bus and analogue output at the same time
• High immunity against dust contamination and humidity