• Six industry-standard pressure port types, including a tube port
which provides for hermetically-sealed process connection
POTENTIAL APPLICATIONS
• Industrial: Refrigerant pressure monitoring in HVAC/R
systems; dry air system pressure, process controls and
automation
• Transportation: Dry air system monitoring; hydraulic, brake,
and engine oil fluid pressure monitoring; air brake pressure
monitoring
The PX3 Series is not recommended for use with media
involving water, saturated air such as steam and vapor, and
ammonia.
PORTFOLIO
Honeywell’s PX3 Series joins the PX2 Series, MLH Series, and
SPT Series heavy duty pressure transducers.
DESCRIPTION
Honeywell’s PX3 Series Heavy Duty Pressure Transducers
use piezoresistive sensing technology with ASIC (Application
Specific Integrated Circuit) signal conditioning in a brass
housing and Metri-Pack 150, DIN, or cable harness electrical
connections. The PX3 Series is calibrated and temperature
compensated from -40°C to 125°C [-40°F to 257°F].
VALUE TO CUSTOMERS
• Total Error Band (TEB) ±1.0 %FSS from -20°C to 85°C:
Provides indication of the sensor’s true measurement
performance over a specified temperature range; small
error promotes system uptime and efficiency. (See Figure 1.)
Figure 1. TEB Definition and Temperature Performance
Sources of Error
Offset
Full Scale Span
Pressure Non-Linearity
Pressure Hysteresis
Pressure Non-Repeatability
Thermal Effect on Offset
Thermal Effect on Span
Thermal Hysteresis
Total Error Band (%FSS)
3
2
1
0
-1
-2
-3
-40°C
[-40°F]
-20°C
[-4°F]
0°C
[32°F]
Accuracy
BFSL
Total
Error
Band
Total Error Band
Temperature (°C [°F])
85°C
[185°F]
125°C
[257°F]
• Higher insulation resistance and dielectric strength:
Protects the user and sensor in high over-voltage
situations, and ensures that the device is compliant with
industry standards.
• Higher EMC performance: Operates more reliably in the
presence of electro-magnetic fields, such as near wireless
signals, RF communication, and electrical devices.
• Higher external freeze/thaw resistance: Survives exposure to
frost, commonly found in refrigeration systems. (See Figure 2.)
Sensing and Internet of Things
Heavy Duty Pressure Transducers
Table 1. Electrical Specifications
Characteristic
Supply voltage:
ratiometric voltage output:
5 Vdc
3.3 Vdc
current output:
-40°C to 100°C
>100°C to 125°C
Over voltage and reverse voltage:
ratiometric voltage output
current output
Current consumption:
5 Vdc supply
3.3 Vdc supply
Short circuit protection
Nominal output transfer function:
5 Vdc supply
3.3 Vdc supply
8 Vdc to 30 Vdc supply
Parameter
5 Vdc ±0.25 Vdc
3 Vdc ±0.25 Vdc
8 Vdc to 30 Vdc
8 Vdc to 25 Vdc
±16 Vdc
±35 Vdc
3.0 mA max.
1.6 mA to 2.1 mA
yes
PX3 Series, 1 bar to 50 bar | 15 psi to 700 psi
0.5 Vdc to 4.5 Vdc (ratiometric to supply)
0.33 Vdc to 2.97 Vdc (ratiometric to supply)
4 mA to 20 mA
Table 2. Performance Specifications (At 25°C [77°F] and under unless otherwise noted.)
Characteristic
Parameter
Operating temperature range
1
-40°C to 125°C [-40°F to 257°F]
Storage temperature range
1
-40°C to 125°C [-40°F to 257°F]
Compensated temperature range
-40°C to 125°C [-40°F to 257°F]
2
Total Error Band :
-20°C to 85°C [-4°F to 185°F]
±1.0 %FSS
<-20°C, >85°C [<-4°F, >185°F]
±2.0 %FSS
Accuracy BFSL
3
±0.25 %FSS
Response time
<2 ms (10% to 90% step change in pressure)
Turn on time
4
<7 ms
5
EMC rating :
surge immunity (all leads)
±1000 V line to ground per IEC 61000-4-5
electrostatic discharge
±4 kV contact, ±8 kV air per IEC 61000-4-2
radiated immunity
10 V/m (80 MHz to 1000 MHz) per IEC 61000-4-3
fast transient burst
±1 kV per IEC 61000-4-4
immunity to conducted disturbances 3 V per IEC 61000-4-6
radiated emissions
40 dBμV (30 MHz to 230 MHz), 47 dBμV (230 MHz to 1000 MHz) per CISPR 11
radiated immunity:
ratiometric (voltage) output
200 V/m per ISO 11452-2
4 mA to 20 mA (current) output
140 V/m per ISO 11452-2
Insulation resistance
6
:
ratiometric voltage output
>100 MOhm at 1500 Vdc
current output
>100 MOhm at 1000 Vdc
Dielectric strength
<1 mA at 1500 Vac (1 min) or 1800 Vac (1 s)
6
Load resistance :
ratiometric voltage output
>5 kOhm
current output
(V
in
- 8) x 50 Ohm
Life
>10 million full scale pressure cycles over the calibrated pressure range
Dependent on seal material. See Figure 5.
Total Error Band: The maximum deviation from the ideal transfer function over the entire compensated temperature and pressure range. Includes all
errors due to offset, full scale span, pressure non-linearity, pressure hysteresis, pressure non-repeatability, thermal effect on offset, thermal effect
on span, and thermal hysteresis.
3
Accuracy: The maximum deviation in output from a Best Fit Straight Line (BFSL) fitted to the output measured over the pressure range at 25°C
[77°F]. Includes all errors due to pressure non-linearity, pressure hysteresis, and pressure non-repeatability.
4
Turn on time: Duration from power applied until first valid output for voltage output. Typical value for 4 mA to 20 mA output.
5
Tested using 1,5 m [59.1 in] long cable.
6
Tested in dry, non-ionized air.
1
2
2
Sensing and Internet of Things
Heavy Duty Pressure Transducers
Table 3. Pressure Reference Definitions
Pressure Reference
Absolute
Definition
PX3 Series, 1 bar to 50 bar | 15 psi to 700 psi
Output is calibrated to be proportional to the difference between applied pressure and a fixed reference to
perfect vacuum (absolute zero pressure).
Sensor construction is identical to the absolute version with a built in reference at zero pressure in order to
minimize measurement error over temperature. The output is calibrated to be proportional to the difference
Sealed gage
1
between applied pressure and a reference of 1 standard atmosphere (1.013 barA | 14.7 psiA). Example: 100
psi sealed gage has a calibrated pressure range from 14.7 psi absolute to 114.7 psi absolute. (See Figure 3.)
1
Sealed gage option only available in pressure ranges at or above 8 bar | 100 psi.
Figure 3. Ratiometric Output Option AA for 100 psi,
Absolute vs Sealed Gage
5
4.5
4
3.5
Diagnostics Mode (For Ratiometric Voltage Output Only)
The PX3 Series diagnostics mode allows the device to
indicate when internal or external faults occur. If an internal
fault occurs, the output will rail to the preset lower or upper
limit values shown in Figure 4 and Table 5.
External faults will result in the sensor’s output exceeding
those preset limits (lower or upper). (For example, if the
external sensor ground (signal) were lost, the sensor output
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