Sales Products :: Magnetic
High Performance Magnetometers
Geometrics G-822A/G-823A Caesium Vapour Magnetometers.
The G-822A is designed for all airborne or mobile applications where the unique combination of high sensitivity and very rapid sampling of the earths magnetic field are required. Applications include mapping geologic structure for mining, oils and gas exploration and the detection and delineation of target bodies in environmental and engineering surveys. The G-823A variant includes a CM221 counter assembly which digitises the larmor and outputs a serial data string.
Features Include
- Automatic hemisphere switching
- Highly Versatile, larmor output, or RS232 in the G-823A variant
- High Sensitivity 0.0005nT/root Hz RMS with the G-822A super-counter
- Digital output, (G-823A only) can be logged with MagLog™ software
- High bandwidth, can track changes of 1000's nT over periods as small as 0.1 sec
Technical Specifications
| Measured Quantity | Total Magnetic field in nT typical sensitivity 0.0005nT/root HZ RMS with super counter, <0.004nT/root Hz RMS in G-823A |
| Operating Principle | Self Oscillating split beam Optically pumped Caesium Vapor cell (non-radioactive) |
| Heading Error | ± 0.25nT over entire 360° range |
| Absolute Accuracy | 3nT throughout range |
| Output | Cycle of larmor frequency, 3.498572 Hz/nT 2V P-P. RS232 serial output in G-823A Variant |
| Power Supply | 24 to 32 VDC |
| Operating Temperature | -35°C to + 50°C |
| Operating Range | 20,000nT to 100,000nT |
| Water tight | Sealed for occasional immersion to 60cm water depth |
| Operating Zones | The earth's field vector should be at an angle of greater than 6° away from the sensor's equator and greater than 6° away from the sensor's long axis. Automatic hemisphere switching |
| Dimensions | Sensor 6.032cm dia x 15.875 cm long, Electronics: 6.35 cm dia 27.94 cm long |
| Weight | Sensor: 340g, Electronics: 623g |
DataSheets
G-822A Datasheet (PDF 134KB)
G-823A Datasheet (PDF 180KB)
G824A-09A Datasheet (PDF 297KB)
