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The complete lack of
moving parts of this insertion flow sensor is the source of its
reliability. There is no rotor to stop turning in dirty water and there
are no bearings to wear out. A rapidly reversing magnetic field is
produced in the lower housing, and as the fluid moves through this field
a voltage is generated. This tiny voltage is measured and translated
into a frequency signal which is proportional to flow rate. This square
wave signal can be sent directly to a PLC or other control, or can be
converted using any of the SeaMetrics family of indicators and
converters.
The installation
fitting of the EX sensor is standard male NPT, and can be directly
threaded into ordinary saddles or threaded weld fittings. The EX115 and
215 include an isolation valve, allowing hot-tap installation, or
installation and removal under pressure. The standard isolation valve is
bronze, but a 316 stainless steel valve is available as an option if
needed. |
