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 V_S LDE...3... LDE...6...	2.70 ... 3.60 V_DC4.75 ... 5.25 V_DC
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 V_S+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

标签：Pressure Sensors

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