OZONE ANALYZER BMT 965 Manual, Rev. 01/2024
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Appendix B: Bench Top Version BMT 965 BT
General Description
The OZONE ANALYZER BMT 965 BT is the portable version of the standard BMT 965. The
instrument is not much bigger than the standard BMT 965. For safety reasons it is powered via a
wall mount power supply 24 VDC with wide range power input.
The BT model has a throttle valve and flow meter attached on the right side, and a Catalyzing
Cartridge (catalytic ozone destruct) on the left (sample gas outlet).
The sample gas enters the throttle valve through a fitting for 3x5 mm (1/8" x 3/16") FEP tubing,
and then via the flow meter enters the BMT 965 through a sample gas filter with a replaceable
white filter insert. Upon exiting the analyser, the sample gas passes through the Catalyzing Cartridge
where the ozone is destroyed.
Operation
The basic operation of the BMT 965 BT is the same as of the standard BMT 965, see chapters
1 - 14 for more details. Care must be taken using the Catalyzing Cartridge, which may never be
exposed to water or humidity, as this might damage the catalysing material. The sample gas filter
can only keep dirt from entering the analyser, not humidity.
As an option the OZONE ANALYZER BMT 965 BT may be ordered equipped with the Internal
Purge Unit (IPU), which consists of a built-in 3-way solenoid valve plus air pump with particle
filter, for fully automatic purging and zeroing the instrument.
This option makes sure, that the cuvette is flushed with ambient filtered air (zero gas) upon acti-
vating zeroing, as described on page 15. The pressure head at the outlet of the Catalyzing Cartridge
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