Series D Ei
Piezoresistive
OEM Pressure Trasmitters
series D-Ei
with I2C interface for hazardous areas
Introducing
the Keller Intrinsically safe D-line; a unique combination of robust industrial
pressure transducers and the popular I2C microcontroller interface for use in
hazardous industrial applications (Gas Group II). Pressure transmitters with
this interface are typically available only in consumer-grade plastic or
ceramic housings, where only compensation parameters are stored in integrated
memory. The Keller intrinsically safe D-Line , however, have unprecedented
embedded digital signal conditioning core for both the compensation and
normalization of the output values.
Interface
The
easiest way to couple an OEM pressure transmitter to a microcontroller based
system is a digital I/O-compatible interface; no amplification, no analog to
digital conversion, no calibration, no temperature coefficients. In short: no
problems.
I2C (Inter-Integrated Circuit) is designed for a direct connection between
devices on a prin- ted circuit board. It is a BUS-system because it allows the
connection of multiple transmitters (slaves) to the same communication lines,
but it is not a fieldbus with the classic long distance inter-connectability.
So the intrinsically safe D-Line combines an industrial pressure interface for
harsh environment with an electrical interface for OEM applications.
The
values are in 16 Bit unsigned integer format and the scaling is given by
constants or by the memory content of the transmitter (two floating point
values IEEE 754 for the pressure scaling).
Performance
features
•
Ultra low power consumption, optimised for battery powered applications
•
Hermetically protected sensor electronics – extremely resistant to
environmental influences
•
Ultra-compact, robust housing made from stainless steel (optional 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
•
Easy to integrate into microcontroller based systems
•
Internal two-chip solution with pressure sensor and signal processing
separation provides a high degree of flexibility
|
Pressure Ranges |
1...1000 bar (abs./rel.) |
|
Dimensions |
4 LD Ei: ø 11 x 4,2 mm 9 LD Ei: ø 19 x 5 mm --> others see data sheet |
|
Accuracy |
max. 0,15 %FS |
