The BLG900 Magnetic Level Gauge (by-pass) is an improved
alternative to sight gauges (glass tubes) used to visually monitor liquid
levels in boilers and storage tanks with up to 450°C temperature and 3600
psi pressure. Replacing the sight gauges with magnetic level gauges would
result in improved safety, 10 times increased visibility, reduced
maintenance, and lower long-term operating cost.
By using non-contact
magnetic level gauges, the problems of glass breakage, leakage, bursting at
high pressure and temperature, poor visibility due to scale build up and
unsafe operation are eliminated. These level indicators are suitable for
applications in chemical and petrochemical industries, sewage water
processing, power generation and boilers.
The BLG900 level gauges use the principle of magnetic
coupling to provide continuous level data without direct contact between the
indicator and the fluid in the system. The float inside the hermetically
sealed tube moves with the changing liquid level, and as it travels, the
coloured stainless steel wafers (flag display) which are magnetically
coupled to the float rotate and their colour changes. The wafers are
visible at night without light. A ruler is mounted along the wafer column
to indicate the quantitative value of the level in metric, British imperial
system or percentage of the total height.
Optionally, the BLG900 series may be equipped with a
transmitter to act as an indicating level transmitter, or magnetic switches
can be installed along the tube to form an indicating level switch.
The BLG900 may be supplied without the wafer column as only
magnetic transmitters and/or switches.