Solid State Medium
Pressure Sensors
NPH Series
Features
•Solid state, high reliability
•Standard TO-8 package suitable for PC board mount
•Low cost , small size
•Available in gauge, absolute, and differential pres-
sure versions
•Media compatible with non-corrosive gases and dry
air
•Typical FSO 100 mV @ 1.5 mA
•Thermal accuracy FSO 0.4% typical
•Overpressure capability to five times maximum rated
pressure
•Three standard ranges: 15, 30 and 100 psi (1, 2 and
7 bar)
•Nonlinearity 0.05% FSO typical
•Standard 3/16 in OD pressure port
•Ceramic substrate with temperature compensation
resistors
Applications
•Process control, P-to-I converters
•Pneumatic control systems
•HVAC controls
•Biomedical: Infusion pumps, sphygmomanometers,
respirators
•Aerospace: Altimeters, barometers, cabin pressure
sensors
•Computer peripherals
Amphenol
Advanced Sensors
NPH Series Specifications
An integrated circuit silicon sensor chip is housed in a
standard TO-8 electrical package that is printed circuit
board mountable.
The latest techniques in micromachining have been
used to ion-implant piezoresistive strain gauges into
a wheatstone bridge configuration that is integrally
formed on a micromachined silicon diaphragm. As with
all NovaSensor silicon sensors, the NPH Series employs
SenStable® processing technology, providing excellent
output stability. Constant current excitation to the sen-
sor produces a voltage output that is linearly propor-
tional to the input pressure.
The user can provide standard signal conditioning cir-
cuitry to amplify the 100 mV output signal. The sensor is
compatible with most non-corrosive gases and dry air.
A laser-trimmed, thick-film resistor network on a hybrid
ceramic substrate provides temperature compensation.
Description
Parameter Value Units Notes
General
Pressure Range 0 to 15 psi (0 to 1 bar) 0 to 100 kPa
0 to 30 psi (0 to 2 bar) 0 to 200 kPa
0 to 100 psi (0 to 7 bar) 0 to 700 kPa
Maximum Pressure 4x rated pressure (8)
Electrical @ 77°F (25°C) Unless Otherwise Stated
Input Excitation 1.5 mA 2 mA maximum
Insulation Resistance 108Ω @ 50 VDC
Input Impedance 4000 Ω ±20%
Output Impedance 5000 Ω ±20%
Bridge Impedance 5000 Ω ±20%
Environmental
Temperature Range
Operating(9)
Compensated
Vibration
Shock
Life (Dynamic
Pressure Cycle)
–40 to 257
32 to 158
10
100
1 x 106
°F
°F
gRMS
g
cycles
(-40°C to 125°C)
(0°C to 70°C)
20 to 2000 Hz
11 milliseconds
Mechanical (1)
Weight <0.2 oz (<5 g)
Media Compatibility Non-corrosive gases and clean, dry air
Wetted Materials
Top Port
Bottom Port
Nickel, gold plated Kovar, silicone gel, gold
wire, RTV, silicon and glass.
Gold plated Kovar, silicon, glass and RTV (10)
Parameter Units Min. Type Max. Notes
Performance Parameters(7), Compensated(1), 100, 200 and 700 kPa
Offset mV –2 1 2
Full Scale Output mV 75 100 125 2
Linearity %FSO –0.1 0.05 0.1 3
Hysteresis and
Repeatability
%FSO –0.05 0.01 0.05
Thermal Accuracy of Offset
100 kPa %FSO –0.6 0.4 0.6 4
200 and 700 kPa %FSO –0.5 0.2 0.5 4
Thermal Accuracy of FSO
100 kPa %FSO –0.6 0.4 0.6 4
200 & 700 kPa %FSO –0.5 0.2 0.5 4
Thermal Hysteresis %FSO –0.1 0.05 0.1 5
Short-Term
Stability of Offset
µV/V 5 6, 11
Short-Term
Stability of FSO
µV/V 5 6, 11
1. Performance with offset , thermal accuracy of offset , and thermal ac-
curacy of FSO compensation resistors.
2. FSO with 1.5 mA input excitation.
3. 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 hrs, typical value, not tested in
production.
7. All values at 77°F (25°C) and at 1.5 mA, unless otherwise noted.
8. Topside pressure. Backside pressure maximum pressure is 250 psi
(17.23 bar) or 4x rated pressure, whichever is less.
9. Reduced performance outside compensation range.
10. Backside differential tube is nickel or Kovar.
11. Typical specifications are for reference only; absolute values may vary.
AAS-920-314B-08/2014
www.amphenol-sensors.com
© 2014 Amphenol Corporation. All Rights Reserved. Specifications are subject to change without notice.
Other company names and product names used in this document are the registered trademarks or
trademarks of their respective owners.
Amphenol
Advanced Sensors
NPH Series Specifications
Ordering Information
The code number to be ordered may be specified as follows:
NPH
Code Package Configuration
8 TO-8
Code Pressure Range (kPa)
100 100 kPa; 15 psi (1 bar)
200 200 kPa; 30 psi (2 bar)
700 700 kPa; 100 psi (7 bar)
Code Pressure
A Absolute
G Gauge
D Differential
Code Compensation
H Hybrid substrate
NPH - ____ _ ____ _ ____ _ ____ Typical model number