NPI-12 Series dimensions

NPI-12 Series Specifications

Description

The NPI-12 Series of solid state, media isolated pressure

sensors are designed to provide a cost effective

solution for applications that detect tube blockages

and pump performance. The NPI-12 Series is intended

to mount adjacent to flexible tubing to sense tube

expansion. Cleanliness is assured with the NPI-12 Series

stainless steel finish.

The NPI-12 Series incorporates state-of-the-art

IsoSensor technology, which gives the OEM user the

best in price and performance. They are designed

to operate in hostile environments while providing

outstanding sensitivity, linearity and hysteresis. The

piezoresistive sensor chip is housed in a fluid filled

cavity and isolated from the measured media by

a stainless steel diaphragm and body. As with all

NovaSensor silicon sensors, the NPI-12 Series employs

excellent output stability.

The NPI-12 Series offers many features with superior

performance. The pressure sensitivity is calibrated at

0.20±0.01 mV/V/psi. The combined errors of linearity,

pressure hysteresis, repeatability and temperature are

less than ±4 %FSO. The maximum overpressure is 50

psi (3.44 bar). A five volt excitation is needed to supply

power to the device. The operating temperature range

for the NPI-12 Series is 50°F to 104°F (10°C to 40°C),

while the storage temperature is -40°F to 158°F (–40°C

to 70°C). Electrical connection is accomplished with a 4

pin connector that accepts standard 0.025 in (0.64 mm)

square posts on 0.100 in (2.54 mm) centers. A red wire

allows for easy recognition of connector orientation.

NPI-12 Series schematic diagram

Parameter

Value

Units

Notes

General

Pressure Range

15

psig

Maximum Overpressure

50

psig

Environmental

Temperature Range

Operating

50 to 104

°F

(10°C to 40°C)

Storage

–40 to 158 (Dry) °F

(-40°C to 70°C)

Mechanical

Weight

0.01

lb

(5 g)

Media Compatibility

316L stainless steel

Diaphragm Dome Height

0.000 to 0.008

in

1

(0.000 mm to 0.20 mm)

Electrical(2)

Excitation

5.0

volts

Parameter

Units

Min.

TypicaL

Max. Notes

Performance Parameters (2)

Zero Pressure Output

±%FSO

—

—

5

Sensitivity

mV/V/psi 0.19

0.20

0.21

Linearity, Hysteresis,

Temperature Errors

±%FSO

—

—

4.0

3

Response Time (10% to 90%) ms

—

1.0

—

4

1. Maximum change in diaphragm height relative to the edge of the sensor.

2. Supply current = 5 VDC and ambient temperature = 77°F (25°C), unless otherwise

noted.

3. Best fit straight line.

4. For a zero-to-full scale pressure step change.