600 mm Helmholtz Coils,

for radiofrequencies

 - Versión en Español (clic aquí)

Ferronato® - BHRF600-3-A

---  Desktop set of three pairs of Helmholtz coils, for laboratory and general purposes.

---  Generates magnetic fields from 0 Hz to 2 MHz.

  • Similar generating field rate for the three pairs: 9 µT/A

  • Accurately made, with error smaller than ±1% in the generated field.

  • Thanks to its simple support and its joins by screws the coil arrengement can be modified with relative facility.

  • The coils can undergo heatings of until at least 100 ºC without damage.

  • Robust construction but with a reasonable weight.

  • Totally constructed with non-ferromagnetic materials.

  • Excellent quality/price ratio.

  • There are versions of one and two axis available, with similar characteristics:

    • BHRF600-1A-A  Set of one pair (one axis), X.

    • BHRF600-1B-A  Set of one pair (one axis), Z (vertical).

    • BHRF600-2A-A  Set of two pairs (two axes), X and Y (horizontal/horizontal).

    • BHRF600-2B-A  Set of two pairs (two axes), X and Z (horizontal/vertical).

 

SPECIFICATIONS OF THE SET

Field/Current ratio 9.0 µT/A (0.09 Gauss/A) ±3%, for each pair, X, Y or Z. See in below more accurate values for every pair.
Maximum field 72 µT (0.72 Gauss) in a steady way (environmental temperature: 20 ºC). Each pair.
Maximum current 8.0 A DC-ACrms in a steady way (environmental temperature: 20 ºC). Each pair.
Maximum RF voltage 2000 Vpeak (4000 Vpeak-peak for symmetrical waveforms). Each pair.
Magnetic field homogeneity Differences smaller than ±1% with respect to the centre, in a spherical volume of 150 mm of diameter centred in the coils. Differences smaller than  ±5%  in a spherical volume of 220 mm of diameter. Volumes to 1% and 5% greater in some directions.
Orthogonality error <0.2º for any pair of axes.
Connection Two female 4-mm bananas (able to grip bare wire also) and a female BNC connector for each pair.
Maximum working temperature 80 ºC for the set / 100 ºC for the coils, as measured on coils surface.
Coil cross section Winding: 6.5 x 1 mm. Total (external): 8 x 3 mm.
Materials Winding in enamelled copper wire reinforced with fibre-glass mat and filled with epoxy resin. Pillars and brackets of Acetal ("Delrin"). Upper and lower plates in foamed PVC. Screws of  brass and Nylon.
Maximum dimensions  Width 620 mm x Depth 620 mm x Height 674 mm.
Weight 18.8 kg, for the BHRF600-3-A set.
Accessories Delivered with Instructions of Use in Spanish and English.
Warranty Two years.

SPECIFICATION FOR EACH COIL PAIR

  X pair (medium) Y pair (smaller) Z pair (larger)
Effective diameter, in mm (±0.5%) 599.4 589.0 609.8
Turns number 3 3 3
Field/current ratio (±1%) 9.00 µT/A 9.16 µT/A 8.85 µT/A
DC Resistance, at 20 ºC (±5%)                (1) 154 mΩ 152 mΩ 149 mΩ
Self-resonance Frequency (±2%) 2.64 MHz 2.70 MHz 2.66 MHz
Self-inductance (±7%) 37.3 µH 36.6 µH 37.9 µH

(1) - Resistance measured at the general connection block.

- These specifications are subject to change without prior notice -

- BH1300-3-A model page - click here -

- BH600-3-B model page - click here -

- BH300-3-A model page - click here -

- To obtain this page in PDF format,click here -

 

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  Updated: 12-Jul-2008