Thomas
Products designs and manufactures hundreds of standard flow
and level
switches, as well as water flow gages, liquid level gauges,
flow gages,
water level controls, liquid level controls and flow controls.
LEVEL SWITCH SELECTION
GUIDE
Model 4000 Custom level
Switch
1. Serialization, documentation
retained on purchased materials, processes,
inspection
Factory replaceable switch bundles.
2. Investment cast components machined
in-house.
3. Welding: Thomas Products LTD.
certified welders under requalification
system, performed in low hydrogen environment.
Process schedules revision controlled.
Inspection 100‰ bubble tight, hydrostatic,
fluorescent penetrate.
4. UL recognized.
Approved packaging
5. Switches shock and vibration
tested.
Automated assembly procedure.
Operational Q.C. systems and manual, MIL
I 45208 and MIL STD 45662.
Inspection using calibrated tools and gages
traceable to National Bureau of Standards
under Thomas Products LTD. recalibration
systems.
Injection molding in-house, Thomas Products
LTD. can certify that only virgin materials
are used and no reprocessing is done
nor has color concentrate been added
during molding.
Dry Indicator Not in Contact With
Liquid
1. New Technology patented design.
2. Accelerated life tested in a
variety of fluids.
Call-outs provided are typical to their
respective models.
3. Raw materials inventoried in
a controlled and segregated department
under Thomas Products LTD. stock rotation
program.
4. Periodic destructive testing,
i.e. verifying collapse pressure rating.
Operation: The housing has 2 separate chambers. In
the front chamber behind a transparent
lens is a 2 color roller, half red,
half green and it is equipped with a
magnet. In the rear chamber is a magnet
equipped float free to swing with the
action of the liquid's level. The poles
of the 2 magnets are opposite creative
a permanent interlock. As the liquid
level falls, the float and magnet swing
to rotate the roller exposing the red
side indication low liquid level. Accordingly,
as the level rises, the green side indicating
a satisfactory liquid level condition
appears.
1. Indicator Turns Red When
Liquid is low; Green Means Liquid
is OK.
Typical Operation: A magnet equipped float moves directly
with the liquids level to actuate the
hermetically sealed reed switch within
the stem.
Call
or email us today to speak
with an applications specialist!
Thomas
Products Ltd. 1-800-666-9101 987 West Street • Southington,
CT 06489-1023
Tel: 860-621-9101 • Fax: 860-621-1470
Thomas
Products manufactures level and flow switches for the Process Control,
Petroleum, Chemical, Semiconductor, Marine, Harsh Environment, Commercial
Building,
Refrigeration, Air Conditioning, and Critical Condition Industries
and many more.
