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Safety and Productivity Solutions
Heavy Duty Pressure Sensors,
PX2 Series and PX3 Series
An Application Note
Background
Honeywell’s PX2 Series and PX3 Series Heavy Duty Pressure
Transducers are a portfolio of highly configurable pressure sensors that
use piezoresistive sensing technology with ASIC (Application Specific
Integrated Circuit) signal conditioning in a metal housing. These products
are fully calibrated and compensated for offset, sensitivity, temperature
effects and non-linearity using the on-board ASIC. The Total Error
Band, which provides the most comprehensive, clear, and meaningful
specification of the sensor’s measurement performance, is ±2 %FSS (40
ºC to 125 ºC [40 °F to 257 °F]) for the PX2 Series and ±1 %FSS (20 °C to
85 °C [4 °F to 185 °F]) for the PX3 Series. (See Figure 1.)
Pressure ranges are 1 to 70 bar | 100 kPa to 7 MPa | 15 psi to 1000 psi for
the PX2 Series and 1 bar to 50 bar | 15 psi to 700 psi for the PX3 Series.
All products are designed and manufactured according to ISO 9001
standards and are RoHS and CE compliant.
Solutions
With thousands of possible configurations, the PX2 Series and PX3 Series
allow Honeywell to meet customer requirements and quickly provide
the preferred options for the application. They are compatible with a
variety of harsh media including brake fluid, common hydrofluorocarbon
refrigerants, next generation low global warming potential (GWP)
refrigerants, engine oil, water, hydraulic fluids, and compressed air. The
wide operating temperature range, ingress protection, and radiated
immunity allow for reliable performance in tough environments.
These transducers measure absolute, sealed
gage, or vented gage pressure (PX2 only for
vented gage). The absolute versions have an
internal vacuum reference and an output value
proportional to absolute pressure, the sealed
gage versions have the offset calibrated at 14.7
psiA, and the vented gage versions measure
pressure with respect to ambient pressure. (See
Table 1.)
Potential Applications
Industrial
HVAC/R: May be used to monitor system
performance for proper environmental control of:
• Compressors:
- Inlet and outlet pressure
- Oil pressure
- Rack rooms
• Refrigerant recovery systems
• Rooftop chillers
Air compressors: May be used to monitor
compressor performance and efficiency,
specifically:
• Filter pressure drop
• Inlet and outlet pressure
• Oil pressure
• Pumps
General: May be used to monitor air and fluid
pressure in:
• Cooling water inlet and outlet pressure
• Factory automation
• Flow and level
• Fluid power
• Injection molding knock-out valves
• Lasers
• Pneumatics
• Solar energy
• Sprayers
• Valves
Transportation
• Air system monitoring
• Air brakes
• Cooling systems
• Engine oil
• Hydraulic oil pressure monitoring
• Manifold absolute pressure (MAP)
Figure 1. TEB Definition and Temperature Performance
Total
Error
Band
Accuracy
BFSL
All Possible Errors
Thermal Hysteresis
Thermal Effect on Offset
Thermal Effect on Span
Pressure Non-Linearity
Pressure Hysteresis
Full Scale Span
Offset
Pressure Non-Repeatability
-20 °C
[-4 °F]
-40 °C
[-40 °F]
0
85 °C
[185 °F]
0 °C
[32 °F]
125 °C
[257 °F]
1
2
3
-1
-2
-3
Temperature (°C [°F])
Total Error Band (%FSS)
Total Error Band
