Proximity Explosion-Proof
Ultra-Mag™ Level Switches
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| For Powder & Bulk
Solids |
| A unique,
patented Magnetic Linkage isolates the electrical compartment
from controlled product, reducing maintenance and improving sensitivity.
The sealed switch compartment and sealed leads yield the utmost
in reliable operation. A wide selection of diaphragms and switches
is available with choices of flange or suspension mounting to
fit your specific application. The dry level Ultra-Mag™ is
extremely sensitive and very economical. The magnetic linkage
makes this simple explosion-proof diaphragm switch the most rugged
and reliable level control for a variety of products (see cut-away
above). |
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| Mounting Selection: |
| A choice of either suspension or flange mounting
is available to match your application. Flange mounting is the
best choice for control of low or intermediate level in vessels
containing granular product that does not "bridge", "rathole",
or otherwise build up on vessel walls. Choose suspension mounting
for high level in vessels and for better operation with "bridging" product.
See below for more information on suspension and flange mounting
kits. Note that the mounting configuration is represented by the
letter "S" for suspension or "F" for flange which is the second
digit in the part number below. |
| Diaphragm Selection:
See Chart |
| A wide variety of diaphragms
is available to match product bulk density, flowability, abrasiveness
and temperature requirements while providing maximum sensitivity.
The best choice for vessels subject to pressure or vacuum is "breathable" fabric (P
Series), requiring no venting. Non-porous elastomer (G Series) type
diaphragms are the best choice for more abrasive product and broader
temperature range applications. Venting is always required with
the G series and if used in pressurized vessels, venting to the
tank atmosphere is required to allow pressure equalization. A slide
rule "Diaphragm Selector" is available from the factory to help
you choose the diaphragm best suited to your application. See
Chart |
| Suspension Mounting |
| Suspension
Mounting is normally used for high level monitoring in
vessels. For product over 20 lbs./cu. ft., the level switch
(diaphragm face) should be located about 1/3 of the distance
from the vessel wall to the point of entry of the product.
For product less than 20 lbs./cu. ft., the unit should be located
closer to the point of entry of the product - ½ the
distance from the vessel wall to the point of entry. Pressure
required to depress the diaphragm and trip the switch is in
the range of 5-15 oz. in the horizontal direction (perpendicular
to the diaphragm). Suspension mounting provides the easiest
vertical adjustment capability, greatest sensitivity and best
maintenance conditions. |
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| Suspension Assembly Kits: |
| Suspension
Assembly Kits: Pre-assembled kits are available from the
factory, or you can build your own kits using standard pipe
fittings shown in our Proximity Bill of Materials (Form No.
101). Pipes and fittings are normally galvanized steel, but
aluminum and stainless steel pipes and fittings are available.
Units pictured above are secured to a steel cover plate that
rests on a rectangular steel flange welded into the top of
the vessel. Aluminum and stainless coverplates and flanges
are also available. Standard 48" long x 1" pipe provides working
depth (WD) up to 48". Longer pipe (to provide greater WD) is
available. GS Series switches have upper (L1 = 28" standard)
and lower (L2 = 20" standard) 1" pipes, with a tee (for stilling
pot) in between. A stilling pot is required to equalize pressure
and keep dirt from building up behind the diaphragm. PS series
require a ½" conduit in 1" suspension pipe for explosion
proof applications. The ½" conduit (56" standard length)
is a standard part of the GS series assembly. |
| Specifications: |
Service: Compatible powder or bulk solids.
Wetted Materials: Mounting Flange: See model chart. Aluminum
or 304 SS. Diaphragm: See model chart. Urethane, Buna-N, Teflon®,
Silicone Rubber, Polyester, Viton®, White Buna-N (food grade),
or EPDM.
Temperature Limits: Depends on diaphragm material, see model
chart. Standard switch: -40 to 185°F (-40 to 85°C), high temperature switch: -40 to 350°F
(-40 to 176°C).
Pressure Limit: 60 psig (4.14 bar).
Enclosure Rating: General purpose or weatherproof and explosion-proof.
See model chart.
Switch Type: See model chart.
Electrical Rating: See model chart.
Electrical Connections: 18 gage solid core, 600 volt TEW 105°C, style
1015. Epoxy sealed at conduit entrance. 12" (304.8 mm) long.
Conduit Connection: 1/2" female NPT.
Process Connection: For flanged models standard is 8-3/8" (212.725 mm)
diameter bolt hole circle.
Mounting Orientation: Flange mount or suspend depending on model.
Set Point Adjustment: Internal screw.
Weight: 7 lb (3.18 kg).
Options: Suspension kits and flange adaptor rings.
Agency Approvals: UL and CSA. |
| Complete Model Chart |
| Popular Models: |
| Model
Number |
Description |
| 901-409 |
"P" Kit includes
1/2" pipe (56"), 1" pipe (48"), 1" pipe coupling,
1-1/2" NPT strain relief on 1" pipe. Galvanized mild
steel pipe, explosion proof standard. |
| Notes: |
Specials include
aluminum or stainless steel assemblies. Flange port
and cover assemblies are sold separately. CONSULT
FACTORY for details. |
| 901-412 |
"G" Kit includes
1/2" pipe (56"), watertight strain relief and 1" coupling,
upper 1" pipe (28"), lower 1" pipe (20"), strain
relief w/1-1/2" NPT Male 1"x1"x1" Tee, 1" Street
Ell and 1" pipe - 4" long Stilling Pot, Gal. St.
pipe, explosion proof standard. |
| Notes: |
Specials include
aluminum or stainless steel assemblies. Flange port
and cover assemblies are sold separately. CONSULT
FACTORY for details. |
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