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 Pa
Differential (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 VDC
4.75 ... 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/s
ca. 3 min
50 s
40 s
15 s
260 °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