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wound around the two cores to detect any imbalance of saturation between them, this generates
a voltage proportional to the external field.
A feedback arrangement designed to null the field injects a feedback current through the pick-up
coil to oppose the background field.
5.2. Probe Cables
The probe connecting cable is a four-conductor overall screened type, as indicated in the product
brochure. The cable length with which the probes are normally supplied and the length to which
this can be extended are also described in the brochure.
Note: If extending the cable beyond the length indicated in the product brochure, use a
cable of a lower conductor resistance. This will avoid measurement errors.
5.3. Types of Probe
Probes are available in sensitivity ranges and constructions as indicated in the product brochure.
Each is identified by a code letter on the label affixed close to the plug on the probe cable.
For axial construction, the sensing direction is in the direction of the connecting cable entry. For
transverse probes, the element is in the T section which is perpendicular to the direction of cable
entry.
The measuring range stated for each probe is that which is obtained on the LCD with no offset
applied (Mag-01H only).
The following table shows the standard probes available:
Type
Axial
Transverse
Cryogenic
Note: * The LCD of the magnetometer is limited to ±0.2mT maximum.
A magnetometer probe switch unit is available for the sequential selection of two or three Mag
probes, types B - G, for operation with a single Mag-01 or Mag-01H instrument. The Mag probes
can be operated at a distance of up to 25 metres from the switch unit.
5.3.1. Standard Packaging Probes (Types B, C, D, E)
BARTINGTON INSTRUMENTS
Low field probes
(0 to 0.2mT)*
Mag B Probe
Mag C Probe
Mag F Probe
Page 13 of 20
High field probes
(0 to 2mT)
Mag D
Mag E Probe
Mag G Probe
OM0382/9
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