NPC-120 Series of Disposable Medical Pressure Sensors

The NovaSensor NPC-120 Series of Disposable Medical Pressure Sensors is specifically designed for use in disposable medical applications. The device is compensated and calibrated per the Association for the Advancement of Medical Instrumentation (AAMI) guidelines for industry acceptability. The sensor integrates a high-performance, pressure sensor die with temperature compensation circuitry and gel protection in a small, low-cost package.

The NPC-120 Series is manufactured in a class 1000 clean room to minimize possible sources of contamination. A specially designed, silicon, micromachined sensing element is used to meet or exceed all industry requirements, while minimizing assembly and test cost for maximum customer value. Thick-film laser trimming is employed for final compensation and calibration. Sensitivity is maintained to ±1% and linearity is better than 1% in the physiological operating pressure range.

The NPC-120 Series is batch-manufactured in ceramic plate form and shipped as an intact array or as single sensors packaged in Tape and Reel format for easy customer automation. This assembly method draws from well-established manufacturing techniques used in the electronics industry in order to produce a quality, high volume product.

General Parameters	Value	Units	Notes
Pressure Range	-30 to 300	mmHg	-0.58 psi to 5.8 psi (-0.03 bar to 0.03 bar)
Overpressure	125	psi	(x bar) minimum

Electrical Parameters*	Value	Units	Notes
Input Excitation	1 to 10	VDC	Calibrated for 6 VDC
Dielectric Breakdown	10,000	VDC	5
Risk Current	2	µA	Maximum (per AAMI), 5
Input Impedance	285 to 315	Ω
Output Impedance	285 to 315	Ω
* Electrical @ 72°F (22°C), unless otherwise stated.

Environmental Parameters	Value	Units	Notes
Compensated Temperature	59°F to 104°F	°F	(15°C to 40°C)
Operating Temperature	59°F to 104°F	°F	(15°C to 40°C)
Storage Temperature	-13°F to 158°F	°F	(-25°C to 70°C)
Humidity	10 to 90	%
Light Sensitivity	1	mmHg	maximum (per AAMI BP22)
Operating Product Life	168	hours
Shelf Life	3	years

Mechanical Parameters	Value	Units	Notes
Weight	<0.0044	lb	(<2 g)
Volume Displacement	<0.0008	in³	(<0.02 mm³)
Media Interface	Medical grade, dielectric gel
Gel Tube Interface Material	Polycarbonate

Performance Parameters¹	Value	Min	Typ	Max	Notes
Offset	mmHg	-25	0	25
Sensitivity	V/V/mmHg	4.95	5	5.05
Calibration	mmHg	97.5	100	102.5	2
Symmetry	%			±5
Linearity (-30 to 100 mmHg)	mmHg			1	6
Linearity (100 to 200 mmHg)	% output			1	6
Linearity (200 to 300 mmHg)	% output			1.5	6
Thermal Coefficient Offset	mmHg/°C			±0.3	3
Thermal Coefficient Span	%/°C			±0.1	3
Frequency Response	Hz	1200			5
Phase Shift	degrees			5	5
Offset Drift	mmHg/8 hrs			1	4, 5
Assumes 6 VDC and 71.6°F (22°C) and after five second warmup, unless otherwise specified. Output of sensor with no pressure applied and 150 kΩ resistor shorted across +VIN to +OUT. Over temperature range of 59°F to 104°F (15°C to 40°C). Normalized offset/bridge voltage - 8 hours after 20 seconds warmup. Previously qualified, not tested in production. Deviation from straight line drawn through zero and 100mmHg data points.

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