HELMHOLTZ COILS - Technical Specifications - Lake Shore Cryotronics, Inc.

Helmholtz Coils (Field Standards) for use with current source or power supply only

	MH-2.5	MH-6	MH-12	MH-2X-10
Field accuracy	0.75%
Inside diameter	2.5 in	6 in	12 in	12 in (x-axis) and 9.75 in (y-axis)
Field strength	≈30 G at 1 A	≈25 G at 1 A	≈12 G at 1 A	≈15 G at 1 A (note: coils are not exactly matched)
Field uniformity	0.5% within a cylindrical volume 0.75 in long, 0.75 in diameter, at center of coil	0.5% within a cylindrical volume 1.6 in long, 1.6 in diameter, at center of coil	0.5% within a cylindrical volume 3.0 in long, 3.0 in diameter, at center of coil	≈0.5% within a 2.5 in cube, at center of coil
DC coil resistance/ inductance (approx)	3 W/6.3 mH	10 W/36 mH	20 W/93 mH	20 W (x-axis), 15 W (y-axis)/ 128 mH (x-axis), 74 mH (y-axis)
Maximum Continuous Current	2 A
Operating Temperature Range	0 ºC to 40 ºC (32 ºF to 104 ºF)

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