Description
- Airborne and Vehicle Applications with Multi-Sensor Array Capability
- Automatic Hemisphere Switching
- Optional G-823A configuration with CM-201 Internal Mini-Counter (up to 8 sensors) for post-acquisition compensation
- Very low heading error – ±0.15 nT over entire 360° Equatorial and Polar spins
- Geometrics offers complete turnkey systems including Birds, Stingers, Wingtip installation accessories as well as digital data acquisition systems, flight path recovery, GPS navigation, gamma ray spectrometers, VLF EM , post-acquisition data processing software and training
A single coaxial cable of up to a standard 10 meters length supplies both 28 VDC power and Larmor signal transmission from the sensor driver electronics. The interconnect cable from the driver/electronics to the sensor may be supplied in various lengths (see specs on reverse) with a standard length of 13.5 ft.
MODEL G-822A CESIUM MAGNETOMETER SENSOR SPECIFICATIONS
| Operating Principle | Self-oscillating split-beam Cesium Vapour (non-radioactive) |
| Operating Range | 20,000 to 100,000 nT |
| Operating Zones | The earth’s field vector should be at an angle greater than 6º from the sensor’s equator and greater than 6º away from the sensor’s long axis. Automatic hemisphere switching. |
| Sensitivity | < 0.001 nT/√Hzrms. Typically 0.003 nT P-P at a 0.1 second sample rate 0.02 nT P-P for CM-201 |
| Heading Error | ± 0.15 nT (over entire 360º polar and equatorial spin) |
| Absolute Accuracy | < 3 nT throughout range |
| Output | Cycle of Larmor frequency = 3.498572 Hz/nT, 2 V P-P coupled through the sensor power input |
| Mechanical | |
| Sensor | 60.32mm diameter, 146mm long, 339 g – any orientation in 177.8mm diameter stinger |
| Sensor Electronics | 63.5mm diameter, 279.4mm long, 623 g |
| Cables | |
| Sensor to Electronics | Standard 4.1 m. Other lengths available from 0.75m at 1m increments with connector on electronics end. Note: Cable lengths are approximate due to cable dielectric variations |
| Sensor Electronics to Counter | Standard 10 m, up to 50 m (Coax with signal superimposed on power, requires decoupler board or box.) |
| Operating Temperature | -35°C +50°C |
| Storage Temperature | -45°C +70°C |
| Altitude | Up to 9,000m |
| Weatherproof | O-Ring sealed for operation in rain or 100% humidity |
| Power | 24 to 32 VDC, 1 amp at turn-on and 0.5 amp thereafter |
| Accessories | |
| Standard | Power/Larmor coaxial cable (electronics to counter), standard length 10m, maximum 50m, spare O rings, operation manual and carrying/storage case |
| Optional | |
| Signal/Power Decoupler, board or multi-channel box | Separates the Larmor signal from the power (28 V) to enable connection to Customer supplied counter |
| Internal Decoupler | P/N 27504 – up to two sensor installation |
| External Decoupler | P/N 27560 – three and four sensor installation |
| Internal CM-221 Counter | See G-823 A Data Sheet |
| Stinger, Wingtip, Bird | Contact GeoResults for complete system integration information |
Product Manual
Product Brochure
