Druck LPM9000, LPX 900 Data sheet
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.
g
GE
Sensing
Pressure Measurement
Operating Pressure Ranges Overpressure
• 0.04, 0.08, 0.2 inH2O 20 inH2O (50 mbar)
(0.1, 0.2, 0.5 mbar)
• 0.4, 0.8 inH2O (1.2 mbar) 1.5 psi (100 mar)
• 8 inH2O (5, 10 mbar) 7.5 psi (500 mbar)
• 20 inH2O (50 mbar) 30 psi (2 bar)
• 40 inH2O (100 mbar) 45 psi (3 bar)
• 80 inH2O (200 mbar) 60 psi (4 bar)
• 7.5 psi (500 mbar) 75psi (5 bar)
• 15 psi (1 bar) 120 psi (8 bar)
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)
Electrical output and supply
Supply Sensitivity
±0.01 % FS/Volt maximum
LPM/LPX 9000
Specifications
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.
0.98 in (24.8 mm)
0.31 in (7.8 mm)
Low pressure port
G 1/8 Female
Pressure ports
High pressure port
G 1/8 female
Diameter A
3.11 in (79 mm)
Mounting:
Diameter B M5x12 deep
PG7 cable
gland
Ranges Diameter A Diameter B
psi (bar) in (mm) in (mm)
Up to 4 inH2O (10 mbar) 3.7 in (94 mm) 3.3 in (83.8 mm)
8 inH2O (20 mbar) 3.3 in (83.8 mm) 2.8 in (72.8 mm)
LPM/LPX 9000 Series installation drawing
60°
60°
Output Supply Wires
LPX unidirectional 4 to 20 mA 10 to 30 VDC 2
LPX bidirectional 12 ±8 mA 10 to 30 VDC 2
LPM unidirectional 0 to 5 V 10 to 30 VDC 3
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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