Hydrogen Analysis0 pages

BAGGI BA-H2A
Process Hydrogen Analysis System
The BAGGI BA-H2A is part of the BAGGI BASE® Instruments Series. They are the result of combining the latest
state-of-the-art-technology with over 50 years of industry experience.
The BA-H2A is an online real-time hydrogen process analyzer. The sensor is a solid state design based on a thin
film of palladium alloy. The presence of H2 (down to 15 ppm concentration)
changes the electrical resistance and capacitance of this film. The measured
electrical signals are processed by software and the hydrogen level is displayed
in real time. The system maintains the sensor element at a constant
temperature, therefore its operation is unaffected by the gas and ambient
temperatures. The system can be specially built for installation in areas with an
explosive atmosphere.
The sensor is able to operate in process gas streams with up to 95% relative
humidity and temperatures up to 100ºC. It is ideal for hydrogen production and
petrochemical applications where real time
measurements of hydrogen can increase
process plant efficiencies and improve
diagnostics.
Several versions are available to meet
specific applications. All of these versions use the same electronics and
enclosures; the only difference is in the sensor element and/or calibration
gasses:
Standard process monitor (calibration: H2 in N2)
Process monitor for air background (calibration: H2 in Air)
CO tolerant process monitor (calibration: H2 in N2)
H2S tolerant process monitor (calibration: H2 in N2)
Corrosion resistant process monitor (calibration: H2 in N2)
The BASE® Series embedded computer is the heart of the system.
The figure shows an ATEX certified version, contained within a Stainless Steel
316L enclosure provided with a protective air purge system and a Vortex cooler (connected to the plant instrument
air). Magnetic push buttons allow controlling the system without opening the cabinet.
ATEX compliance:
- II 2 G Ex px II T6
- II 3 G Ex pz II T6
The BA-H2A system performs automatically the sensor verification and the in field calibration without removal from
the enclosure. The calibration interval is 90 days.
The system can be equipped with a vacuum pump, regulator and flow meter to control the process stream to the
sensor. It is able to measure gases from two different sources.
The computer, besides displaying the actual readings on its LCD screen, offers a GUI for configuring the system, for
archiving the historical data in Excel compatible format and for displaying the measurement in graphical format and
for generating alarms. Finally, it can transmit remotely the measurements by means of 4...20 mA analogue outputs
and the alarms by means of digital (relay) outputs.
In short the embedded computer, together with its circuitry, acts as a PLC to operate the Process Hydrogen
Analyzer during normal operation, start-up and shut-down.
Note: the BAGGI BASE® Instruments Series includes also H2 analysis through
gas chromatography (GC) and thermal conductivity detector (TCD).

TDSCS90925AR1_BAH2A

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B.A.G.G.I . SrL – V.le Campania,29 20133 Milano Italy – Tel. +39 02715547 – Fax +39 027490571 – baggi@baggi.com