| Products: magnetizers &... |
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 Electromagnetic Systems
Laboratory Electromagnets - Electromagnet Systems
All Walker Scientific standard electromagnets are of the proven "H" frame, designed to provide superior homogeneity over a wide field range. With the use of our foil wound, water cooled coils, which have proven to produce the highest magnetic field per kilowatt, as compared with other methods of coil construction, we are able to provide extremely high fields at a moderate cost.
Our method of coil construction achieves a 40% greater fill factor over other methods of coil construction which results in greater accessibility to the working gap. It also enables more ampere turns to be condensed into a smaller volume nearer the magnet poles for minimized stray fields resulting in the highest magnetic field per kilowatt of power per cubic inch of coil volume for a given coil construction.
Our line of variable gap electromagnets offer added versatility while still offering the highest degree of rigidity for maximizing homogeneity.
Cast magnet iron frames are used in all of our variable gap electromagnets to enable us to provide the most uniform and field efficient variable gap electromagnets on the market by putting the iron where it is most needed.
The entire magnet yoke is cast from pure magnet iron of the same melt and the pole bores are finished by jig boring to insure precise alignment of the moving poles. In addition, a ramp locking mechanism is built into each movable pole to firmly lock each pole in position during operation so as to achieve fixed gap magnet performance.
All magnets are factory aligned and tested to specified field levels and homogeneity prior to shipment using NMR (Nuclear Magnetic Resonance) techniques where possible.
Applications:
- Magnetic hysteresis studies
- Magnetic susceptibility measurements
- Hall effect studies
- Magneto-optics experiments
- NMR (Nuclear Magnetic Resonance) studies
- EPR (Electron Paramagnetic Resonance) studies
- Quantum mechanics analysis
- Biological studies
Features:
- Proven "H" frame construction for high inherent homogeneity over a wide field range
- High efficiency tape wound coils for highest magnetic field per kilowatt input
- Pure magnet iron cast frames for all variable gap electromagnets
- Jig bored pole bores insure precise pole alignment for all variable gap electromagnets
- Positive ramp locking for all variable gap electromagnets
- NMR alignment, where possible for all electromagnets
- A wide selection of associated current and field regulated power supplies are also available
Specifications:
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SIZE
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TYPE
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ELECTRICAL
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FACILITY
REQUIREMENTS
|
PHYSICAL
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|
|
Model #
Field Direction
|
Air Gap
and Range
|
Intercoil Spacing
|
Input Power KW
|
Power Sources
|
Max Inlet Temperature
and Pressure
|
Flow Rate
|
Weight
|
|
Recom.
|
Max
|
Recom.
|
Optional Max.
|
Magnet Only
|
Ship
Weight
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4
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HV-4V
Vertical
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Variable
.065-3.25"
.165-8.26 cm
|
6.00"
15.24 cm
|
2.2
|
2.2
|
MH-1120
|
-
|
80°F
27°C
30-80 psi
|
1 gpm
4 lpm
|
350 lb
159 kg
|
425 lb
193 kg
|
|
HV-4H
Horizontal
|
Variable
.065-4.00"
.165-10.16 cm
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4.00"
10.16 cm
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1.25
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2.45
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HS-525
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HS-735
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80°F
27°C
30-80 psi
|
1 gpm
4 lpm
|
400 lb
181 kg
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425 lb
192 kg
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7
|
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HV-7V
Vertical
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Variable
.065-4.25"
.165-10.8 cm
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7.25"
18.42 cm
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5.0
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8.5
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HS-1050
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HS-1365
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80°F
27°C
30-100 psi
|
3 gpm
11 lpm
|
1200 lb
544 kg
|
1350 lb
612 kg
|
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HV-7H
Horizontal
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Variable
.065-7.25"
.165-18.42 cm
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7.25"
18.42 cm
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5.0
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8.5
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HS-1050
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HS-1365
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80°F
27°C
30-100 psi
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3 gpm
11 lpm
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1225 lb
556 kg
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1375 lb
624 kg
|
|
10
|
HV-10V
Vertical
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Variable
.065-5.5"
.165-13.97 cm
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8.25"
20.96 cm
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11.25
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14.5
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HS-1575
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HS-1785
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80°F
27°C
30-100 psi
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5 gpm
19 lpm
|
2800 lb
1270 kg
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3000 lb
1361 kg
|
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HV-10H
Horizontal
|
Variable
.065-8.25"
.165-20.96 cm
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8.25"
20.96 cm
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11.25
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14.5
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HS-1575
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HS-1785
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80°F
27°C
30-100 psi
|
5 gpm
19 lpm
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2850 lb
1293 kg
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3050 lb
1383 kg
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Note: The air gap for fixed electromagnets can be varied by interchanging pole caps.
The maximum air gap range for fixed gap electromagnets is based on using standard pole caps. Thinner pole caps can be provided on special order.
Accessories for Laboratory Electromagnets
Related Articles: “How to Select a Magnet System”
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Solenoid Systems
The Walker Scientific line of DC solenoids is ideally suited for work in laser and plasma research, polarized light experiments, biological research and microwave TWT's.
Three lengths (16", 20" and 28") are available as standard products. Each length is available with a choice of bore size. Standard bores are 2", 2.5", 3", 3.5", 4" and 5". Finally each model may be ordered with a choice of field strength of 1000 gauss, 1200 gauss or 1500 gauss.
Each solenoid is epoxy bonded and cast into a single monolithic structure with power and water connections protruding from a common side. The solenoids are wound with a rectangular copper conductor on a non-magnetic metal bobbin, assuring a smooth inner bore.
Eight-inch square, non-magnetic termination flanges are incorporated at each end with four precisely drilled mounting holes positioned to allow end-to-end stacking with a bore alignment of 0.005 TIR (Total Indicator Reading). Magnetic metal termination flanges are also available.
All coils require 2 gpm water cooling. The cooling coils are electrically isolated from the current carrying conductors, so that no shunt current leakage paths are present. Auxiliary cooling apparatus such as de-ionizers or heat exchangers are not required.
If your requirement cannot be met with one from our standard solenoids, we can design to meet your specific application.
SPECIFICATIONS:
|
Model Number
(Bore/Length/Gauss)
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D.C.Input Power (kW)
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Typical Related
Current (Amps)
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Module
Size
(Inches)
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Module
Weight (Lbs.)
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2.0 - 16 - 1000
2.5 - 16 - 1000
3.0 - 16 - 1000
3.5 - 16 - 1000
4.0 - 16 - 1000
5.0 - 16 - 1000
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1.16
1.35
1.55
1.72
1.93
2.32
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35
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8 x 8 x 16
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90
|
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2.0 - 20 - 1000
2.5 - 20 - 1000
3.0 - 20 - 1000
3.5 - 20 - 1000
4.0 - 20 - 1000
5.0 - 20 - 1000
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1.50
1.70
1.95
2.10
2.20
2.40
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35
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8 x 8 x 20
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110
|
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2.0 - 28 - 1000
2.5 - 28 - 1000
3.0 - 28 - 1000
3.5 - 28 - 1000
4.0 - 28 - 1000
5.0 - 28 - 1000
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2.10
2.45
2.75
3.10
3.40
4.15
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35
|
8 x 8 x 28
|
150
|
|
2.0 - 16 - 1200
2.5 - 16 - 1200
3.0 - 16 - 1200
3.5 - 16 - 1200
4.0 - 16 - 1200
5.0 - 16 - 1200
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1.20
1.45
1.60
1.75
1.95
2.35
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30
|
8 x 8 x 16
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100
|
|
2.0 - 20 - 1200
2.5 - 20 - 1200
3.0 - 20 - 1200
3.5 - 20 - 1200
4.0 - 20 - 1200
5.0 - 20 - 1200
|
1.55
1.75
2.00
2.20
2.45
2.95
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30
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8 x 8 x 20
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120
|
|
2.0 - 28 - 1200
2.5 - 28 - 1200
3.0 - 28 - 1200
3.5 - 28 - 1200
4.0 - 28 - 1200
5.0 - 28 - 1200
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2.20
2.50
3.15
3.50
4.20
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30
|
8 x 8 x 28
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160
|
|
2.0 - 16 - 1500
2.5 - 16 - 1500
3.0 - 16 - 1500
3.5 - 16 - 1500
4.0 - 16 - 1500
5.0 - 16 - 1500
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1.60
1.85
2.10
2.30
2.50
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30
|
8 x 8 x 16
|
110
|
|
2.0 - 20 - 1500
2.5 - 20 - 1500
3.0 - 20 - 1500
3.5 - 20 - 1500
4.0 - 20 - 1500
5.0 - 20 - 1500
|
2.10
2.30
2.00
2.90
3.20
|
30
|
8 x 8 x 20
|
130
|
|
2.0 - 28 - 1500
2.5 - 28 - 1500
3.0 - 28 - 1500
3.5 - 28 - 1500
4.0 - 28 - 1500
5.0 - 28 - 1500
|
2.90
3.25
3.75
4.10
4.50
|
30
|
8 x 8 x 28
|
180
|
Notes:
1. Gauss central field tolerance ±10%
2. Prices available upon request for solenoids to match customer power supply impedence.
3. 1500 Gauss solenoids not available in 5-inch bore as standard (Prices available upon request.)
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