GE
Sensing
Features
•Ranges ±0.04 in H2O to 15 psi (1 bar)
•Accuracy better than 0.1% full scale (FS) best fit straight line (BSL)
•Line pressure from vacuum to 3000 psi (200 bar)
•Uni-directional or bi-directional operation
•Excellent thermal and long-term stability
•Full wet/wet media compatibility
The LPM/LPX 9000 Series accurately measure low differential or relative pressure of gases and liquids from 0.04 inH2O (0.1 mbar) to 15 psi (1 bar) FS. With a choice of current or voltage output, they are suitable for uni-directional (e.g. 0 to 20 mbar) or bi-directional
(e.g. -20 to 20 mbar) pressure measurements.
An innovative eddy current measurement system enables the use of low displacement sensor diaphragms operating well within elasticity limits. In addition, the
“dry cell” sensor concept means no internal fluid is used. Combined with a rugged design, this ensures high performance with long term reliability, even when operating over a wide temperature range.
The LPM/LPX 9000 Series are therefore ideally suited to a wide range of high precision applications, including leak detection, test benches and low flow measurement of liquids and gases among many others.
LPM/LPX 9000
Series
Druck Low Differential
Pressure Sensors
LPM/LPX 9000 Series is a Druck product. Druck has joined other GE high-technology sensing businesses under a new name—
GE Industrial, Sensing.
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GE
Sensing
LPM/LPX 9000
Specifications
Pressure Measurement
Operating Pressure Ranges |
Overpressure |
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• 0.04, 0.08, 0.2 inH |
O |
20 inH O (50 mbar) |
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2 |
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2 |
(0.1, 0.2, 0.5 mbar) |
1.5 psi (100 mar) |
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• 0.4, 0.8 inH |
O (1.2 mbar) |
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• 8 inH |
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2 |
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7.5 psi (500 mbar) |
O (5, 10 mbar) |
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2 |
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O (50 mbar) |
30 psi (2 bar) |
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• 20 inH |
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2 |
O (100 mbar) |
45 psi (3 bar) |
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• 40 inH |
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2 |
O (200 mbar) |
60 psi (4 bar) |
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• 80 inH |
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2 |
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• 7.5 psi (500 mbar) |
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75psi (5 bar) |
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• 15 psi (1 bar) |
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120 psi (8 bar) |
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Static (Line) Pressure
•Vacuum to 750 psig (50 bar) ranges 0.04 to 4 inH2O
•Vacuum to 3000 psig (200 bar) ranges 8 inH2O to 15 psi (1 bar)
Pressure Media
Diaphragm material Inconel X750: fluids/gases compatible with 316L stainless steel, Inconel X750 and silver solder.
Diaphragm material Beryllium copper: fluids/gases compatible with 316L stainless steel, Inconel X750, Beryllium copper, brass, and solder (Pb/Sn).
Relative Humidity
0 to 100% RH (non-condensing)
Transduction Principle
Variable inductance (Eddy current)
Output |
Supply |
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Wires |
LPX unidirectional 4 to 20 mA |
10 to 30 VDC |
2 |
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LPX bidirectional 12 ±8 mA |
10 to 30 VDC |
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LPM unidirectional 0 to 5 V |
10 to 30 VDC |
3 |
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LPM unidirectional 0 to 10 V |
16 to 30 |
VDC |
3 |
LPM bidirectional 2.5 V ±2.5V |
10 to 30 |
V |
3 |
LPM bidirectional 5 V ±5V |
16 to 30 |
V |
3 |
LPM bidirectional 0 V ±5V |
±8 to ±15 VDC |
4 |
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Electrical output and supply
Supply Sensitivity
±0.01 % FS/Volt maximum
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0.98 in (24.8 mm) |
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Low pressure port |
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G 1/8 Female |
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0.31 in (7.8 mm) |
60° |
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Mounting: M5x12BDiameter |
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Pressure ports |
60° |
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Diameter A |
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deep |
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PG7 |
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cable |
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3.11 in (79 mm) |
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gland |
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High pressure port |
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G 1/8 female |
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Ranges |
Diameter A |
Diameter B |
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psi (bar) |
in (mm) |
in (mm) |
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Up to 4 inH2O (10 mbar) |
3.7 in (94 mm) |
3.3 in (83.8 mm) |
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8 inH2O (20 mbar) |
3.3 in (83.8 mm) |
2.8 in (72.8 mm) |
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LPM/LPX 9000 Series installation drawing
Insulation Resistance
100 MΩ at 50 VDC
Long Term Stability
<0.1%FS/year at reference conditions
Load Impedance
•LPX: 0.05 (Vsupply 10) kΩ maximum
•LPM: 5 kΩ minimum
Resolution
Infinite
Combined Non-Linearity, Hysteresis and Repeatability
±0.1% FS BSL all ranges
Asymmetry (Bi-directional Operation Only)
<1% FS
Static Pressure
•Zero: <0.5% FS/750 psi (50 bar)
•Span: <0.35% reading/750 psi (50 bar)
Static pressure errors are repeatable and reversible; they can be eliminated using the potentiometers at operating pressure.
Mounting Position Effect
Position zero offset that can be corrected with zero potentiometer, no span effect.
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