Magnetic Level Gauge Overview
The HAWK Magnetic Level Gauge (MLG) is widely applied in the
monitoring and process control
of liquid level and interface for many industries; such as petroleum, chemical,
power, paper,
metallurgy, water treatment etc.
The SPI and TBI are the standard and special magnetic level gauges of HAWK. The
products
are suitable for real time, precise, safe and reliable continuous measurement of
process level.
The design adopts a 360° magnetic ring which is hermetically sealed and
incompressible.
The indicator uses hermetical sealed glass tube technology to clearly indicate the
level, which
eliminates the common problems of glass gauges, such as vapour, condensation and
liquid
leakage etc.
Principle of Magnetic Level Gauge
Based on the principle of
magnetic coupling and
buoyancy, the magnetic level gauge provides real-time
measurement for level and interface.
HAWK’s Magnetic Level Gauge (MLG) is connected to a
process vessel. Within the chamber is a float containing a
360° magnetic ring. Outside of the chamber is an indicator
equipped with a vacuum glass tube, which contains a
bicoloured two-face magnetic bargraph. In response to
the level movement, the float moves accordingly, forcing
the magnetic bargraph to turn and change color. True
liquid level is indicated or “read” from the corresponding
point on the measuring scale.
Applications of Magnetic Level Gauge
- Boiler: Steam drum liquid level
- Power generation: Auxiliary machinery liquid level (HP reheater, LP reheater, deaerator, condenser and heating network heater etc), chemical water
- Coal Chemical: Methanol, dimethyl ether, synthesis ammonia/urea, MTO, CTL, SNG
- Silicon industry: Organic silicon, polycrystalline silicon
- Petroleum and petrochemical: Oil and gas, ethylene, trimerization and etc.
- Fine Chemicals: Methane oxide, epoxy ethane, aniline, PTMEG, BDO, carbon fiber, POM,acetic acid, styrene, rubber, crude benzol refining
- Others: Metallurgy, paper-making, water treatment, biological, pharmaceutical, food and beverage etc.
Product Application of Magnetic Level Gauge
Application I:
High Temperature and High Pressure (HTHP) Application
- Designed for HTHP, all components are incompressible
- Maximum process temperature: 1000°F or 538°C
- Maximum process pressure: 6000 psig or 42MPa
- Suitable for boiler steam drums, power plant auxiliary machinery, hydrogenation and other HTHP working conditions
Application II:
Low temperature / Ultra-low temperature application
- Designed for low temperature and frost prevention, all components hard and anti-compression
- Minimum process temperature: -320°F (-196°C)
- Absolutely avoids condensation, frost, freezing and etc.
- Suitable for ethylene, Rectisol and other low temperature/ ultra-low temperature working conditions
Application III:
Special Materials
- 304SS+PTEF, Hastelloy C-276, Zr 702, Ni-6 and etc.
- Wide range of temperature, pressure and corrosion resistance
- Acetic acid, acetic anhydride, chlor-alkali suitable for chemical industry and other corrosive working conditions
Application IV:
Integrated Application
- Integrated application with level transmitters/switches
- Local indication and remote signal simultaneously
- Measure multiple process interfaces
- Reduced costs of product and maintenance