LDE Low Pressure Sensor for High Immunity to Dust and Humidity

上海仪舶实验室自动化 25-02-05 10:26:34

LDE Low Pressure Sensor for High Immunity to Dust and Humidity

The LDE differential low pressure sensors are designed with thermal flow measurement of gas through a micro-flow channel integrated within the sensor chip. The advanced LDE technology features outstanding sensitivity especially for ultra-low pressures. The very low gas flow through the sensor ensures high immunity to humidity, dust contamination, and long tubing compared to other flow-based pressure sensors. Small SMT and DIP housings allow for space-saving PCB-mounting.

Typical applications of the LDE differential low pressure sensors include HVAC, medical devices, and instrumentation.

Technical specifications

Pressure ranges Differential/Gage: 0...25 to 0...500 PaDifferential (Pressure/Vacuum): 0...±25 to 0...±500 Pa
Output signal SPI, 0.3...2.7 V, 0.5...4.5 V
Pressure connection tube fitting (Ø 2 mm)
Size without nipples and pins (approx.) 13 x 18 x 8 mm

Features

Pressure sensor based on thermal micro-flow measurement

Pressure ranges from 25 to 500 Pa (0.1 to 2 in H2O)

High flow impedance

  • high immunity to dust and humidity

  • very low flow-through leakage

  • no loss in sensitivity using long tubing

    Calibrated and temperature compensated

    On-chip temperature sensor

    Unique offset auto-zeroing feature ensuring superb long-term stability

    Offset accuracy better than 0.2 % FS

    RoHS and REACH compliant

    Analog output and digital SPI interface

    Total accuracy better than 0.5 % FS typical

    Quality Management System according to EN ISO 13485 and EN ISO 9001

    Media Compatibility

    Air and other non-corrosive gases

    Specifications

    Maximum ratings

    .
    Supply voltage VS LDE...3... LDE...6... 2.70 ... 3.60 VDC4.75 ... 5.25 VDC
    Output current 1 mA
    Lead specifications Average preheating temperature gradient Soak time Time above 217 °C Time above 230 °C Time above 250 °C Peak temperature Cooling temperature gradient 2.5 K/sca. 3 min50 s40 s15 s260 °C-3.5 K/s
    Temperature ranges Compensated Operating Storage 0 ... +70 °C-20 ... +80 °C-40 ... +80 °C
    Humidity limits (non-condensing) 97 %RH
    Vibration1 20 g
    Mechanical shock2 500 g

    Electrical Connection3

    Specification notes:1. Sweep 20 to 2000 Hz, 8 min, 4 cycles per axis, MIL-STD-883, Method 2007.2. 5 shocks, 3 axes, MIL-STD-883E, Method 2002.4.3. The maximum voltage applied to pin 1 and pins 6 through 10 should not exceed VS+0.3 V.

    Video: LDE/LME/LMI ultra-low pressure sensors for medical and HVAC applications

    LDE/LME/LMI ultra-low pressure sensors for medical and HVAC applications

    Video: LDE/LME/LMI ultra-low differential pressure sensors offer high sensitivity

    First Sensor LDE/LME/LMI ultra-low differential pressure sensors offer high sensitivity

    Video: LDE/LME/LMI ultra-low differential pressure sensors offer high immunity to dust and humidity

    First Sensor LDE/LME/LMI differential pressure sensors offer high immunity to dust and humidity

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