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Fluxgate Magnetometer for Observatory Applications

 
Product Overview
  Fluxgate for
Observatory Application
  Fluxgate for
Magnetotelluric Application
  Fluxgate for
Space Application
  Fluxgate for
Shipboard Application
  Proton Magnetometer
  Coil Systems
 
Services Overview
  Calibration Service
  Electronic Development

 
 
 
 
 
 

Download Datasheet:

Observatory Magnetometer
Fluxgate Sensors


 

 

The magnetometer for observatory applications consists of a vector-compensated ringcore sensor with a Helmholtz coil system for field compensation and a digital magnetometer electronics box. The coil system is manufactured of titan to provide high thermal stability of the compensation field with 10ppm/°C. The sensor head can be mounted and orientated on a tripod. The Sensor head is connected to the electronics box by a 20m cable.
The Magnetometer is interfaced by a host PC via RS232. The host PC serves as a data logger.

 

Observatory sensor head
Observatory sensor head

The sampling rate is usually 1 vector/sec. However, with an external trigger (e.g. with the observatory clock or GPS clock) the measurement period can be adjusted to a desired value <4Hz.
Two measurement ranges, which differ in the differential non linearity (DNL) are available. The first range covers the whole earth's magnetic field range of +/-60000nT with a DNL of 350pT. The second range covers a magnetic field of +/-4000nT with a DNL of 30pT. For the second range an automatic main field compensation is available.
Besides the magnetic field vector the temperature of sensor and electronics box are sampled.

 

Magnetometer electronics box
Magnetometer electronics box

 
Technical Data:

digital fluxgate magnetometer
3-component ringcore sensor

sensor mainframe material:

Titan (expansion coefficient: 10ppm/°C)

sensor dimensions:

H: 11cm Ø: 12cm

sensor weight:

2.5kg

total weight of the magnetometer:

   sensor head:

7.5kg

   electronics box:

1.0kg

noise level:

<20pT/SQRT Hz

long term stability:

<10nT/Year

orientation:

orthogonal system (X,Y,Z)

resolution:

10pT

dynamic range:

   full range mode:

+/-60.000nT (DNL: 350pT)

   variometer mode:

+/-  4.000nT (DNL: 30pT)
automatic compensation in the variometer mode

 
Interfaces

data interface:

RS232

data format:

1Hz mean values (with internal trigger) or <4Hz
with external trigger, ASCII (optional binary), 19200baud

cable length between sensor head  
and electronic box:

20m

input voltage:

12V

power consumption:

2.0W

 
The output data format can be adapted to the specific application demands.