NovaSensor NPI-15 Series

NovaSensor NPI-15 Series

High Pressure Sensors

The NovaSensor NPI-15 Series of current-driven, media-isolated High Pressure Sensors are designed to operate in hostile environments, and yet give the outstanding sensitivity, linearity, and hysteresis of a silicon sensor. They incorporate state-of-the-art IsoSensor technology, which gives the OEM user the best in price and performance. The piezoresistive sensor chip is housed in a fluid-filled cylindrical cavity and isolated from the measured media by a stainless steel diaphragm and body. As with all NovaSensor silicon sensors, the NPI-15 Series employs SenStable® processing technology, providing excellent stability.For compensation of temperature effects, a complete resistor network is supplied on a hybrid ceramic substrate. The IsoSensor design minimizes temperature errors to provide a maximum offset errors of 0.75% FSO over the 32°F to 158°F (0°C to 70°C) compensated range.

Application
  • Process control systems
  • Hydraulic systems and valves
  • Automobiles and trucks
  • Biomedical instruments
  • Refrigeration and HVAC controls
  • Appliances and consumer electronics
  • Ship and marine systems
  • Aircraft and avionic systems

Features
  • Solid state, high reliability
  • High sensitivity with 200 mV typical FSO with 1.0 mA
  • 316L stainless steel, IsoSensor design
  • Linearity 0.1% FSO typical
  • Thermal accuracy 0.2% FSO typical
  • Four standard ranges: 500 psi to 5,000 psi (34 bar to 345 bar) available
  • Several standard configurations
  • Custom configurations and other pressure ranges available

Specifications

General Parameter Value Units Notes
Pressure Range 3500 kPa 507 psi
7000 kPa 1015 psi
35,000 kPa 5076 psi
Maximum Pressure 2x rated pressure
Electrical @ 77°F (25°C) Value Units Notes
Input Excitation 1.0 mA 1.5 mA maximum
Insulation Resistance 100M Ω @ 50 VDC
Input Impedance (min) 4,000 Ω ± 20%
Output Impedance 5,000 Ω ± 20%
Bridge Impedance 5,000 Ω ± 20%
Environmental Value Units Notes
Operating Temperature Range(9) -40°F to 257°F (-40°C to 125°C)
Compensated Temperature Range 32°F to 158°F (0°C to 70°C)
Vibration 10 gRMS 20 to 2000Hz
Shock 100 g 11 milliseconds
Life (Dynamic Pressure Cycle) 10 x 106 cycles 500/1000 psi
34.47/68.94 (bar)
1 x 106 cycles 5000 psi
344.73 (bar)
Mechanical(1) Value Units Notes
Weight ≈28 g NPI-15A-XXX
≈47 g NPI-15B-XXX
Media Compatibility All corrosive media compatible with 316 stainless steel
Case and Diaphragm Material 316L stainless steel
Recommended O-Ring Type A: 0.472 in (12 mm) ID x 0.059 in (1.5 mm) wall
Type B: 2-013 per ISO 3601/1

Performance Parameters Units Min Typical Max Notes
Performance Parameters kPa 3500 7000 35000 1, 8
Offset mV -2 1 2
Full Scale Output mV 170 200 230 2
Linearity %FSO –0.25 0.1 0.25 3
Hysteresis and Repeatability %FSO –.05 0.01 0.05
Thermal Accuracy of Offset %FSO –0.75 0.2 0.75 4
Thermal Accuracy of FSO %FSO –0.75 –0.2 0.75 4
Thermal Hysteresis %FSO –0.2 0.1 0.2 5
Short-Term Stability of Offset µV/V 5 6
Short-Term Stability of FSO µV/V 5 6
Long-Term Stability of Offset %FSO 0.1 7
Long-Term Stability of FSO %FSO 0.1
  1. Performance with offset, thermal accuracy of offset and thermal accuracy of FSO compensation resistors.
  2. FSO with 1.0 mA input excitation.
  3. Linearity by best fit straight line.
  4. 32°F to 158°F (0°C to 70°C) with reference to 77°F (25°C).
  5. 32°F to 158°F (0°C to 70°C) by design.
  6. Normalized offset/ bridge voltage—100 hours, typical value, not tested in production.
  7. One year, typical value, not tested in production.
  8. All values measured at 77°F (25°C) and at 1.0 mA constant current, unless otherwise noted.
  9. Reduced performance outside compensation range, not tested in production.

Product Documents

Part Numbers
Part Number Description
NPI-15A-352-A-H No Port, 3500kPa, absolute pressure, constant current excitation
NPI-15A-352-S-H No Port, 3500kPa, sealed gauge, constant current excitation
NPI-15A-702-A-H No Port, 7000kPa, absolute pressure, constant current excitation
NPI-15A-702-S-H No Port, 7000kPa, sealed gauge, constant current excitation
NPI-15A-353-A-H No Port, 35000kPa, absolute pressure, constant current excitation
NPI-15A-353-S-H No Port, 35000kPa, sealed gauge, constant current excitation
NPI-15B-352-A-H 1/2-20 UNF, 3500kPa, absolute pressure, constant current excitation
NPI-15B-352-S-H 1/2-20 UNF, 3500kPa, sealed gauge, constant current excitation
NPI-15B-702-A-H 1/2-20 UNF, 7000kPa, absolute pressure, constant current excitation
NPI-15B-702-S-H 1/2-20 UNF, 7000kPa, sealed gauge, constant current excitation
NPI-15H-352-A-H 1/4-18 NPT, 3500kPa, absolute pressure, constant current excitation
NPI-15H-352-S-H 1/4-18 NPT, 3500kPa, sealed gauge, constant current excitation
NPI-15H-702-A-H 1/4-18 NPT, 7000kPa, absolute pressure, constant current excitation
NPI-15H-702-S-H 1/4-18 NPT, 7000kPa, sealed gauge, constant current excitation
NPI-15J-352-A-H 1/8-27 NPT, 3500kPa, absolute pressure, constant current excitation
NPI-15J-352-S-H 1/8-27 NPT, 3500kPa, sealed gauge, constant current excitation
NPI-15J-702-A-H 1/8-27 NPT, 7000kPa, absolute pressure, constant current excitation
NPI-15J-702-S-H 1/8-27 NPT, 7000kPa, sealed gauge, constant current excitation
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