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| Home > Lake Shore Products > Electromagnets |
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| Electromagnets & Recirculating Chillers |
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| Typical Field Uniformity (EM4 Magnet) |
Magnet Configuration |
Uniformity
over 1 cm3 |
1% Cylindrical Volume |
Pole Cap
cm (in) |
Air Gap
cm (in) |
Diameter
cm (in) |
Length
cm (in) |
10 (4) |
5 (2.0) |
±0.15% |
1.8 (0.7) |
5.0 (2.0) |
10 (4) |
2.5 (1.0) |
±0.05% |
6.5 (2.5) |
2.5 (1.0) |
7.6 (3) |
2.5 (1.0) |
±0.06% |
4.6 (1.8) |
2.5 (1.0) |
5 (2) |
2.5 (1.0) |
±0.35% |
1.8 (0.7) |
2.5 (1.0) |
5 (2) |
1.3 (0.5) |
±0.16% |
3.6 (1.4) |
1.2 (0.5) |
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| The third column gives uniformity over one cubic centimeter volume centered in the magnet cap. The last two columns give the cylindrical volume within which the magnetic field deviates by less than 1% from the central field. The cylindrical volume is coaxial with the magnet poles and centered in the gap. |
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| Typical Field Uniformity (EM7 Magnet) |
Pole Cap
cm (in) |
Air Gap
cm (in) |
Uniformity
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15.2 (6) |
5 (2) |
Better than ±0.1% over centered 2 in diameter circle |
7.6 (3) |
3.8 (1.5) |
Approximately ±0.1% over centered 1 in diameter circle |
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EM4-HVA |
EM7-HV |
| Air gap |
Up to 11 cm (4.3 in) continuously variable |
Up to 17.8 cm (7 in) continuously variable |
| Nominal coil resistance |
0.25 W per coil (0.5 W wired in series) |
1.0 W per coil (0.5 W wired in parallel) |
| Standard pole cap diameter |
5.1 cm (2 in) |
7.6 cm (3 in) |
| Optional pole cap diameter |
2.5 cm, 7.6 cm, 10.2 cm (1 in, 3 in, 4 in) |
15.2 cm (6 in) |
| Cooling water |
Tap water or closed cooling system |
| Water flow rate |
7.6 L/min (2 gal/min) |
11.4 L/min (3 gal/min) |
| Pressure drop |
200 kPa (30 psi) |
220 kPa (32 psi) |
| Water chiller cooling capacity |
2.5 kW (8,530 BTU/h) |
5.0 kW (17,060 BTU/h) |
| Water inlet temperature |
15 ºC to 25 ºC (59 ºF to 77 ºF) |
15 ºC to 32 ºC (59 ºF to 89 ºF) |
| Coil over temperature limit |
70 ºC (158 ºF) |
| Coil spacing, nominal |
12 cm (4.75 in) |
17.8 cm (7 in) |
| Coil size-width, nominal |
12 cm (4.75 in) |
13.2 cm (5.2 in) |
| Coil size-diameter, nominal |
31.1 cm ( 12.25 in) |
44.5 cm (17.5 in) |
| Current (maximum continuous operating) |
±70 A per coil |
±50 A per coil |
| Voltage |
±35 V nominal |
±50 V nominal |
| Maximum continuous input power |
2.5 kVA nominal |
5 kVA nominal |
| Lake Shore power supply (suggested) |
Model 642 |
Model 665 |
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Size |
| Height |
38.7 cm at 40º angle (15.25 in) without stand |
94 cm (37 in) |
| Width |
84.5 cm (33.25 in) |
101.6 cm (40 in) |
| Depth |
50.8 cm (20 in) |
66 cm (26 in) |
| Weight |
201.9 kg (445 lb) |
614 kg (1350 lb) |
| Shipping weight |
215.5 kg (475 lb) |
660 kg (1500 lb) |
| Shipping dimensions |
95.5 cm × 58 cm × 56 cm
(38 in × 23 in × 22 in) |
86 cm × 122 cm × 119.4 cm
(34 in × 48 in × 47 in) |
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 Click here for Electromagnet Field Plots |
| Click here for Electromagnet Schematics |
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| Support Structures |
| EM4-HSTAND-3 - Aluminum 3-level support structure for EM4-HVA magnets |
- Bottom access to the center of the magnet
- Compact 86.4 cm (34 in) high, 3-level aluminum structure supports the magnet and provides a flexible structure for mounting of addtional hardware
- Leveling feet
- Raises the center of the magnet 61 cm (2 ft) above the ground to provide a comfortable height for sample exchange
- Plate below and above the magnet provided to support test structures or instrumentation
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Weight: 54.4 kg (120 lb, not including magnet)
Dimensions: 58.4 cm W × 50.8 cm D × 86.4 cm H (23 in W × 20 in D × 34 in H)
Shipping weight: 269.9 kg (595 lb, with EM4-HVA magnet)
Shipping dimensions: 91.4 cm W × 61 cm D × 109.2 cm H (36 in W × 24 in D × 43 in H) |
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| EM4-HSTAND-3 |
| Middle plate has U-shaped slot available for bottom access |
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| EM4-STAND-2 - 2-level support structure for all EM4 magnets |
- Compact 53.3 cm (21 in) high, 2-level aluminum support structure supports the magnet and provides a flexible mounting structure
- Leveling feet
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Weight: 35.4 kg (78 lb, not including magnet)
Dimensions: 58.4 cm W × 50.8 cm D × 53.3 cm H (23 in W × 20 in D × 21 in H)
Shipping weight: 252 kg (555 lb, with EM4-HVA magnet)
Shipping dimensions: 91.4 cm W × 61 cm D × 76.2 cm H (36 in W × 24 in D × 30 in H) |
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| Recirculating Chillers Technical Specifications |
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RC-EM4-200230-60-CE |
RC-EM4-200-50-CE |
RC-EM4-230-50-CE |
RC-EM7-200230-60-CE |
RC-EM7-200-50-CE |
RC-EM7-400-50-CE |
| Electromagnet |
EM4 |
EM4 |
EM4 |
EM7 |
EM7 |
EM7 |
| NesLab model number |
M-75 |
M-75 |
M-75 |
M-150 |
M-150 |
M-150 |
| Capacity |
2410 W |
2180 W |
2180 W |
5045 W |
4540 W |
4540 W |
| Power requirements |
200 to 230 V,
60 Hz, 9 A |
200 V,
50 Hz, 9 A |
220 to 230 V,
50 Hz, 9 A |
200 to 230 V,
60 Hz, 15 A |
200 V,
50 Hz, 15 A |
400 V/3-phase,
50 Hz, 8 A |
| Volume |
3.7 gpm at 40 psi |
3 gpm at 40 psi |
3 gpm at 40 psi |
5 gpm at 45 psi |
3.2 gpm at 30 psi |
3.2 gpm at 30 psi |
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General |
| Pump |
PD-2 |
PD-2 |
PD-2 |
CP-55 |
PD-2 |
PD-2 |
| Temperature range |
5 ºC to 35 ºC |
5 ºC to 35 ºC |
5 ºC to 35 ºC |
5 ºC to 35 ºC |
5 ºC to 35 ºC |
5 ºC to 35 ºC |
| Temperature stability |
±0.15 ºC |
±0.15 ºC |
±0.15 ºC |
±0.15 ºC |
±0.15 ºC |
±0.15 ºC |
| Reservoir volume (gal/L) |
0.5/1.8 |
0.5/1.8 |
0.5/1.8 |
0.5/1.8 |
0.5/1.8 |
0.5/1.8 |
| Case dimensions (in) (cm) |
26.2 × 16.3 × 24
66.4 × 41.3 × 61.0
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26.2 × 16.3 × 24
66.4 × 41.3 × 61.0 |
26.2 × 16.3 × 24
66.4 × 41.3 × 61.0 |
30.4 × 21.3 × 29.3
77.2 × 54× 74.3 |
30.4 × 21.3 × 29.3
77.2 × 54× 74.3 |
30.4 × 21.3 × 29.3
77.2 × 54× 74.3 |
| Shipping weight |
91 kg (200 lb) |
91 kg (200 lb) |
91 kg (200 lb) |
130 kg (287 lb) |
130 kg (287 lb) |
130 kg (287 lb) |
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Performance specifications will be affected by changes in temperature, ambient, or coolant.
* M-150 can be used with the EM7 magnet, but do not operate the magnet above the rated wattage. |
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