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Series
GS/PS

Explosion-proof Ultra-Mag™ Level Switch
For Powder & Bulk Solids


Suspension Mount


Flange Mount

U.S. Patent #3,368,173; 3,349,203
Canadian Patent #801,168; 821,621


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Popular Models
Model
Number
DescriptionPrice
901-409  P kit-1/2" pipe (56" Std), 1" pipe (48" Std), 1" pipe coupling, 1-1/2" NPT strain relief on 1" pipe, galvanized mild steel pipe, explosion-proof standard. £ 128.00
901-412  G kit-1/2" pipe (56" Std), watertight strain relief and 1" coupling, upper 1" pipe (28" Std), lower 1" pipe (20" Std), strain relief with 1-1/2" NPT, 1"x1"x1" tee, 1" street ell and 1" pipe - 4" long stilling pot, gal. st. pipe, explosion-proof standard. £ 152.00
*Prices quoted exclude carriage and VAT which will be added where appropriate in accordance with legislation in force at the date of supply. E&OE. Orders are accepted subject to Dwyer Instruments Ltd Standard Terms and Conditions of Sales and none others whatsoever.
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COMPLETE MODEL CHART (Consult factory for pricing on Ultra-Mag™ Switches)
MODEL #                DRY LEVEL MAGNETIC DIAPHRAGM SWITCH
PREFIX - CERTIFICATION
EX 
X
Explosion-proof, UL & CSA, Cl 1, Div I & II, Grps C & D; Cl 2, Div I & II, Grps E, F & G
Explosion-proof, CSA, Cl 2, Div I & II, Grps F & G
General Purpose (no code)
       1ST DIGIT - BASIC MAGNETIC PRESURE SENSING SERIES
  G
P
Elastomeric Diaphragm - Venting required* (Diaphragms 1A - 8A)
Breathable Fabric Diaphragm - No venting required (Diaphragms 16 & 17 only)
               2ND DIGIT - MOUNTING
    S
F
T
Suspended ("G" Series requires suspension vent fittings)* Subtract 10 lb/cu ft - greater sensitivity
Flanged, Aluminum standard
Flanged, 304 Stainless Steel
             3RD DIGIT - HOUSING MATERIAL 
      D
A
E
Aluminum
Aluminum, Anodized
Aluminum, Epoxy Coated
         4TH & 5TH DIGITS - DIAPHRAGM MATERIAL (TEMP) (BULK DENSITY)
  

G
G
G
G
G
G
G
G
G
G
G
G
G
G
P
P

   

1A
2A
3D
3E
3F
4B
5A
6D
6E
6G
6H
7A
7B
8A
16
17

Fluoroelastomer, black, .025" thick, (25 to 300°F), (>30 lbs/cu ft)
Neoprene, black, .025" thick, -30 to 220°F), (>30 lbs/cu ft)
Urethane, orange, .031" thick, (10 to 150°F), (>30 lbs/cu ft)
Urethane, orange, .062" thick, (10 to 150°F), (>90 lbs/cu ft)
Urethane, "3D" elastimer w/bumper for removable overlays, orange, (10 to 150°F), (>90 lbs/cu ft)
Buna-N, black, .020" thick, (-20 to 212°F), (20 to 90 lbs/cu ft)
PTFE/Glass on Sil Rubber, brown, .024" thick, (-40 to 350°F), (30 to 90 lbs/cu ft)
Silicone Rubber, gray, .062" thick, (-40 to 350°F), (15 to 30 lbs/cu ft)
Silicone Rubber on Glass, red, .032" thick, (-40 to 350°F), (30 to 90 lbs/cu ft)
"6C" w/Urethane overlay, gray, (-40 to 350°F), (wood chips diaphragm with "A2")
"6C" w/bumper for removable overlays 901-120, -132, -134 gray, (-40 to 350°F), >90 lbs/cu ft)
Silicone Rubber on Glass, white, .015" thick, (-40 to 350°F), (5 to 40 lbs/cu ft)
Buna-N, white food grade, .060" thick, (-20 to 212°F), (30 to 90 lbs/cu ft)
EPDM, black, .036" thick, (-40 to 275°F), (40 to 90 lbs/cu ft)
Polyester Filter Fabric, white, 150 micron permeability, (-30 to 275°F), (30 to 90 lbs/cu ft)
Polyester "Nitex", white, 15 micron permeability, (-30 to 275°F), (>20 lbs/cu ft)
           6TH DIGIT - SWITCH TYPE
           A
T
V
G
Standard, SPDT, 15 amp, 125, 250 VAC
High Temp, SPDT, 5 amp, 125, 250 VAC; 24 VDC (Non-UL/CSA listed)
High Vibration, SPDT, 15 amp, 125, 250 VAC
Gold Contacts, SPDT, 1 amp, 125 VAC; 1/2 amp, 24 VDC
             SUFFIX - SPECIAL CONTROLS
             -A1
-A2
-A3
D/P with diaphragm cover plate
Wood Chips Controls (with "6G" diaphragm only)
High sensitivity actuator (for very light product)
EX G S D 3D A EXAMPLE OF TYPICAL MODEL NUMBER (ESGSD3DA)*

*G, GS series suspended controls require suspension vent fittings.
CONSULT FACTORY for special assemblies, housing materials, switches, fittings, accessories and applications not listed above.

NOTE: The "EX" prefix must be added to the 6-digit model number for "explosion-proof standard". General purpose units do not require the "EX" or other prefix.

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