OMG Optical Magnetic Gradiometer

OMG

OMG is a very high performance total field magnetometer and gradiometer with both high sensitivity and high bandwidth. It uses a special pulsed pump laser recently developed by Twinleaf to provide high atomic spin polarization and very low systematic error. The sensor has a very narrow axial dead zone that is difficult to encounter during typical magnetic survey. The sensor measures magnetic field using a frequency counter and can track very large changes in magnetic field. It recovers immediately from transient magnetic pulses. With its extraordinary dynamic range, it faithfully tracks very large signal variation while maintiaining its high sensitivity. Multiple sensors can be synchronized using synchronization units such as SYNC2, SYNC4, and SYNC7.

Features

Interface

Images

OMG Controls

OMG Dimensions

Operation

Plug it in, and wait for the sensor to warm up. The status light blinks according to the sensor status:

CodeColorStatus
0WhiteIdle/off
1RedCell heating
2BlueLaser heating/locking
3GreenSensor running

The status code is also reported as the status byte in the data stream:

  ...
  12 49983.918231 3
  13 49983.398123 3
  14 49983.718472 3
  ...

In text mode, the first column is the sequence number that should be sequential; this is useful to make sure you aren't missing points. The second column is the total magnetic field in nanotesla. The last column is the status code.

Firmware

Firmware update: OMG-R8-firmware-2020-06-24-5931f5.bin

Ordering

OMG-200/2, inquire for price.