Analog Hall Probe Teslameter
Magnetic Field Transducer
Corrected for linearity and temperature
The new transducer is based around a Hall effect element, but clever electronic processing of the signal corrects for non-linearities and temperature effects, producing a very accurate analog voltage output directly proportional to the magnetic field present.
Can be easily connected to one of the Group3 controllers (CNA or DNA) to produce an accurate closed loop control magnet system. Using the HPC as the feedback transducer for magnetic field control greatly increases stability and repeatability.
- Accuracy
- Better than 0.05%, . . .up to 10kHz over specified field and temperature.
- Field Range
- +⁄- 2.2 Tesla max (customisable).
- Temperature
- 10 to 50 degrees C.
- Output
- +⁄- 10 volts max (customisable).
- Bandwidth
(small signal) 0 to >200 kHz (-3dB point)
(full output) 0 to 35kHz sine wave (20V peak to peak)
- The present transducer is calibrated to produce ±10 V output for a field range of ±1 Tesla, over 10 to 50 °C, but other field ranges and temperatures are possible.
- Available as a fixed probe housing for built-in OEM use, or as a probe on the end of a flexible cable. The design can be modified to suit particular requirements of an OEM.
- The present circuitry has a bandwidth of 200kHz, but with modifications it is conceptually possible to raise that to a MegaHertz or more.
Flexible Probe
- 130mm x 10mm circuit board with embedded Hall element
- max. thickness 2mm.
- Cable lengths: 1m to 30m.
Fixed Probe Housings
- Very robust probe housings for fixed use.
- Standard products.
- Special probes available to OEM order.
- Non-metallic probe mount for AC use, available to order.
Group3 Corrected Analog Hall Probe
Model HPC-1-2
Operating conditions for full correction:
- Magnetic field Output
- -1.0 to +1.0 T , Temperature 10 to 50 C
- Voltage
- 10 V/T
- Accuracy
- +/- (0.02% of full scale + 0.01% of field) T. i.e. 0.2mT at zero, to 0.5mT at full scale, over 10 to 50 C
- Monotonicity
- 0.05mT
- Bandwidth
- 0 to 150kHz (-3dB point)
- Noise level
- 1mV p-p approx (over bandwidth 0 to 10kHz)
- Power input requirement
- +/-15V DC nominal, 30mA from each. ( +/-14.5V min., +/-18V max.)
- Red LED indicator for "power on"
- Over temperature output
- Opto-coupled output indicates Hall device over-temperature
- Connector
- D9 male
- Probe support
- length 108mm from mounting surface to Hall sensor
- cross section
- 4mm thick (in field direction) x 20mm wide, Aluminum.
Other models available
- full scale ranges from 0.2 to 2 T
- output ranges either +/-5V or +/-10V
- different probe lengths, probe mounting methods, and probe mounting materials to order.
Power supply units available - produces the required +/- 15V, from either 24V AC/DC or 12V AC/DC input
For more information on using these probes, see closed loop magnet control