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«TRITON»-BASED UNDERWATER / BOREHOLE MAGNETOMETER-GRADIOMETER

Making magnetic measurements down to 40 meters under water with 0.1 nT resolution

Common view of magnetometer-gradiometer
Common view of magnetometer-gradiometer

Application:

- Real-time magnetic field measurement inside of boreholes;

- Real-time underwater survey and recording with bindings to depth and GPS coordinates.

Key features:

- High sensitivity of fluxgate sensor 0.1 nT;

- Anyone topology of magnetic field sensor can be chosen
  from single fluxgate element to gradiometer or 3-axis topology;

- Making possible to provide magnetic measurements down to 40 meters under water;

- Real-time graph and digital indication of measurements;

- Connecting to the personal computer the system working as
  simple USB flash disk, since this no special driver required;

- Surfer-compatible measurements data format.

System architecture:

Price is composed from measurement system configuration:

1. Price of basic kit composed from 1 magnetic field sensor with acquisition unit,
    (with GPS-receiver built-in), 2 accumulators, charger, USB-to-PC data cable
    and sensor cable with up to 8 meter length is 4200$.

2. Each additional meter of sensor cable add in the price of 5$.

3. Acquisition unit can maintain up to 12 gradiometer and 3-axis sensors simultaneously.
3.1. Each additional gradiometer magnetic field sensor adds in the price of 550$.
3.2. Each additional 3-axis magnetic field sensor adds in the price of 680$.

4. Odometer on the base of incremental encoder adds in the price of 250$.

5. RTK system consists of receiver, base station with folding tripod
    and set of accumulators with charger adds in the price of 1100$.

Magnetic field measurement system

Magnetic field sensitive element: fluxgate, straight
Magnetic field sensor topologies provided by default: 1/2/3-axial
gradiometer
Amount of 1/2/3-axial or gradiometer magnetic field
sensor maintained by system simultaneously:
1 – 12
Magnetic field components measurement range, nT: ±70000,0
Magnetic field gradient components measurement range, nT/m: ±140000,0
Magnetic field sensing resolution, nT: 0,1
Maximum measurement data rate
3-axis measures per second:
200
Maximum length of sensor cable, m
(by preliminary agreement with the customer):
1000

Coordinates measurement system

Measurement synchronization sources: built-in timer
external odometer
Coordinates measurement units:
– built-in GPS/GLONASS receiver
– odometer on the base of incremental encoder
– RTK system consists of receiver and base station

standard
option
option
RTK navigation systems supported: GPS and GLONASS
RTK receiver connection channel
(including third party manufacturers):
USB/RS-232
NMEA 0183 protocol
Typical GPS/GLONASS coordinates measurement error, m:
– built-in receiver
– RTK


±10
±0,1

Storing and transferring data measured

Capacity of memory to save data measured: 8 GB
Personal computer communication: USB-port

Mechanical specs and power supply

Data acquisition unit dimensions
(length × width × height, mm):
151×90×54
Magnetic field sensors dimensions (length × width × height, mm):
– gradiometer
– 3-axis

1020×60×30
120×100×90
Magnetic field sensors water resistance, m: 40
RTK system components dimensions
(length × width × height, mm):
– receiver
– base station (without tripod)
– tripod for RTK base station
– tripod when folded


120×65×55
170×85×55
1450×600×800
550×100×100
Data acquisition unit weight, g: 540
Magnetic field sensors weight, g:
– gradiometer
– 3-axis

420
300
RTK system components weight, g:
– receiver
– base station (without tripod)
– tripod for RTK base station

230
1300
1200
Power supply source: lithium
accumulator
battery 3S2P
Supply current from fully-charged accumulator, mA: 800
Working temperature range, °С: –20…+70

«Triton» multichannel magnetic field measurement system. User manual

Size of file: 37,2 MB

«SurferCvt» utility application

Size of file: 0,8 MB
Connecting to the personal computer the system working as
simple USB flash disk, since this no special driver required