Gems Sensors & Controls FS-4 Operating Manual

Piston-Type Flow Switches

FS-4 Series

Instruction Bulletin No. 45522

P

Port Adapters . . .

Notes

* Wrench flats provide for proper assembly
** Accepts 1/2" I.D. flexible hose
*** Red wire leads provided on all units prior to March 2002.

Important Points!

Product must be maintained and installed in strict accordance with
the National Electrical Code and GEMS product catalog and instruc­tion bulletin. Failure to observe this warning could result in serious
injuries or damages.

An appropriate explosion-proof enclosure or intrinsically safe inter­face device must be used for hazardous area applications involving
such things as (but not limited to) ignitable mixtures, combustible
dust and flammable materials.

Pressure and temperature limitations shown on individual catalog
pages and drawings for the specified flow switches must not be ex­ceeded. These pressures and temperatures take into consideration
possible system surge pressures/temperatures and their frequencies.

Life expectancy of switch contacts varies with applications. Con­tact GEMS if life cycle testing is required.

Ambient temperature changes do affect switch set points, since the
specific gravity of a liquid can vary with temperature.

Flow switches have been designed to resist shock and vibration;
however, shock and vibration should be minimized.

Liquid media containing particulate and/or debris should be filtered
to ensure proper operation of GEMS products.

Electrical entries and mounting points may require liquid/vapor seal­ing if located in an enclosed tank.

Selection of materials for compatibility with the media is critical to
the life and operation of GEMS flow switches. T ake care in the proper
selection of materials of construction; particularly wetted materials.

P/N 45522

Rev. P

Flow switches must not be field repaired.
Physical damaged sustained by the product may render it unser-

viceable.