Edition 11/2015

Subject to alterations

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Piezoresistive OEM Pressure Transmitters

-40…150 °C, with embedded signal conditioning

Series 4LC…9LC

The Series 4LC…9LC family of miniature OEM pressure transmitters combines a piezoresistive

pressure sensor with -40…150 °C-capable signal conditioning in one compact, easy-to-integrate

package.

Technology

The «LC» line of miniature pressure transmitters leverages KELLER’s extensive background

in high-stability piezoresistive pressure sensors and innovative digital signal processing. Now,

both pressure sensor and signal processor are integrated into a miniature, hermetically-sealed

housing no larger than was once required for the sensor only!

The name given to this new technology is Chip-In-Oil (CIO). CIO means not only that the entire

pressure transmitter is embedded within a hermetically-sealed, oil-filled housing, but that this

transmitter can then be seamlessly integrated into the OEM product, achieving cost savings and

system performance not possible with other, conventional technologies.

Interfaces

The ratiometric analog output simplifies the integrators task by providing a signal output wherein

the output is ratiometric to the supply, thereby eliminating the need to incorporate an expensive,

absolute reference. Providing an 0,5…4,5 VDC output from a 5 VDC supply, the LC-transmitter

is inherently protected against overvoltage and reverse polarity up to ±33 VDC and provides

noise immunity by a factor of 10X relative to the latest standards regarding emitted and

conducted EMI.

Performance features

• Hermetically protected sensor electronics - extremely resistant to environmental influences

• Operating temperature up to 150 °C

• Ultra-compact, robust housing made from stainless steel (optionally Hastelloy C-276)

• No external electronics for compensation or signal processing

• Extremely accurate, outstanding long-term stability, no hysteresis

• Pressure ranges of 1 bar to 1000 bar

• Extremely easy to integrate in overall systems

• Two-chip solution with pressure sensor and signal processing separation provides a high

degree of flexibility.

4LC

8LC

9FLC

7LC

9LC

6LHPC / 7LHPC

(High Pressure)

Connection

4LC / ø 11

4,2

5

8

8

GND

OUT

Supply

9

9

5

5

7

1

0,5

0,5

0,5

7LC / ø 15

8LC / ø 17

9LC / ø 19

ø 5,08

9FLC / ø 17 / ø 21

6LHPC / ø 13

7LHPC / ø 15

Generally applies:

No force must be applied to the pins!

3

3

3

3

3