The Application:
The Standard In-Line Flue gas probe AMS 3211-500 is equipped with a Zircon dioxide sensor located
in the tip of the probe. The Flue gas probe AMS 3211-500 can be used for the measurement of
Oxygen in flue gases from gaseous, liquid and solid fuels and biomass. In Applications with solid fuels
and biomass the Standard In-Line Flue gas probe AMS 3211-500 is equipped with an additional
Stainless steel tube to protect the probe against abrasion. In combination with the Transmitter AMS
3220 the Standard In-Line Flue gas probe AMS 3211-500 is certified by the German TÜV according
European and German environmental regulations and fulfils the requirements for QAL 1 according
EN 14181 and EN ISO 14956.
The Measuring principle:
All AMS Flue gas probes are equipped with Zircon dioxide sensors with Platinum electrodes which
distinguish themselves by a long lifetime in the process. The location of the Zircon dioxide sensor at
the tip of the probe guarantee extremely fast responses of the Standard In-Line Flue gas probe
AMS 3211-500. The Transmitters AMS 3220 and AMS 5200 supply the current for the heater in the
Zircon dioxide sensor. To increase the stability of the measuring values, the sensor temperature is
regulated within low limits. Simultaneously the Transmitters AMS 3220 and AMS 5200 m
The Measuring system:
Typically continuous Oxygen measuring systems are consisting of a Flue gas probe with built in Zircon
dioxide sensor, a Transmitter and a Pneumatic unit. The Pneumatic unit supplies continuously
instrument air to the Zircon dioxide sensor which serves as Reference air. Via a second gas inlet port
at the probe flange the Zircon dioxide sensor can be supplied with calibration gas to verify and correct
the calibration of the sensor in regular intervals. The Pneumatic unit and the Flue gas probe are
connected by two high pressure pneumatic hoses. A multi wire, protected cable connects the
Transmitter to the Flue gas probe electronically. Due to the modular construction of the Oxygen
measuring systems of AMS the Transmitter can be installed inside the housing of the Pneumatic unit.
This reduces the required length of both high pressure pneumatic hose and protected cable. The
power supply for the Transmitter and the Flue gas probe is also installed in the GRP-housing of the
Pneumatic unit. The flue gas probe, the Transmitter and the Pneumatic unit are manufactured
according to the protection class IP 65 for General Applications. The Standard In-Line Flue gas probe
AMS 3211-500 is for universal use. For applications with corrosive flue gases all gas wetted parts of
the probe are manufactured from Inconel 600. To replace an already existing continuous oxygen
measuring system the Standard In-Line Flue gas probe AMS 3211-500 can be fitted with all flange
sizes both in DIN and ANSI dimensions.
Optional the Standard In-Line Flue gas probe AMS 3211-500 can be equipped with time controlled
back purge for high dust applications and with Auto-calibration for the automatic, time controlled
calibration.