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GFP703 3-Axis Fluxgate Magnetic Field Transmitter


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 Coliy Gaussmeter Model List
Model Sensor Type Axis Accuracy
Based on reading
Gaussmeters for High Magnetic Field(0-10T)
G91 Hall Handheld 1 2.0% 2T 10μT
G92 Hall Handheld 1 1.0% 10T 10μT
(with probe Y08P150G93)
Hall Handheld 3 1.0% 3T 1μT
G201 Hall Desktop 1 0.25% 10T 1μT
G203 Hall Desktop 3 0.25% 3T 1μT
G401* Hall Desktop 1 0.05% 10T 0.1μT
G403* Hall Desktop 3 0.05% 3T 0.1μT
G501* Hall Desktop 1 0.01% 3T 0.1μT
GSP301 Hall Digital Transmitter 1 1%, 0.5%, 0.25%,0.05%* 10T 0.1μT
GSP303 Hall Digital Transmitter 3 1%, 0.5%, 0.25%*,0.05%* 3T 0.1μT
Gaussmeters for Low Magnetic Field(0- 4.5mT)
GMR50 GMR Handheld 1 1.0% 4.5mT 10nT
(with probe Y08L150G93)
GMR Handheld 3 1.0% 1mT 10nT
GF601 Fluxgate Handheld 1 0.5% 1mT 1nT
GF603 Fluxgate Handheld 3 0.5% 1mT 1nT
GF803* Fluxgate Desktop 3 0.1% 1mT 0.1nT
GFP703 Fluxgate Digital Transmitter 3 0.5% 1mT 1nT
GFP903* Fluxgate Digital Transmitter 3 0.1% 1mT 0.1nT
Magnetic Field Measurement System
GAS3000 Probe Array of Magnetic Field Detection System:
can be used to simultaneously monitor 2- 128 points of magnetic field
Gaussmeter Calibration System DC Magnetic Field
(Accuracy up to 50ppm)
AC Magnetic Field
(Accuracy up to 0.1%)
·Low Range: 0.1nT- 0.1mT
·Middle Range: 0.1- 100mT
·High Range: 1mT- 2T
·Low Range: 0.1μT- 0.1mT
·Middle Range: 0.01- 15mT
·High Range: 0.1- 200mT
AC Magnetic Field Sensor
AMS-2K Range of 3mT; Frequency response 25Hz- 2kHz
AMS-1M Range of 3mT; Frequency response 2kHz- 1MHz
Note: 1T= 10KG; 1mT= 10G;  1μT= 10mG;  1nT= 10μG;    
 “*”: coming soon without notice.

 GFP703 3-Axis Fluxgate Magnetic Field Transmitter 



With industry standard design and the latest electronic technology, Three-Axis Fluxgate Magnetic Field Transmitter GFP703, made by COLIY, has become so stable and reliable that can be connected with a computer, controller, PLC, and display instruments. Meanwhile, Three-Axis Fluxgate Magnetic Field Transmitter GFP703 is easy to install, easy to make into an integrated system, and able to meet the industrial production of a variety of complex environments and requirements.

Three-Axis Fluxgate Magnetic Field Transmitter GFP703 could make magnetic field intensity  directly converted into 2-channel digital signals (RS485 and USB) and 3-channel analog signals (XYZ, ±10V). Typical applications are that geomagnetism detection, wrapped detection, traffic monitoring, measuring residual magnetism, low-intensity magnetic field measurement, laboratory, etc.

Three-Axis Fluxgate Magnetic Field Transmitter GFP703 power supply is very unique, as 5VDC- 36VDC wide power supply. Lack of power supply or power supply equipment failure situation will lead to voltage instability, and will be likely to cause instability in the test data or hardware damage. Wide voltage power supply, effectively ensures that Magnetic Field Transmitter GFP703 will work stably and has better reliability when power supply voltage is unstable.

Three-Axis Fluxgate Magnetic Field Transmitter GFP703 can be used to detect low-intensity magnetic field in DC measurement mode and AC measurement mode respectively: Transmitter GFP703 allows DC measurements up to 10G(±1mT) with the reading-based accuracy of 0.50%, resolution of 0.01mG(1nT) and AC measurement with the reading based accuracy of 1%, resolution of 0.1mG(10nT), and frequency response range of DC~ 1KHz. Meanwhile, Three-Axis Fluxgate Magnetic Field Transmitter GFP703 has passed the CE certification and EMC (Electromagnetic Compatibility) test.
 • Manufactured by industry standards
 • High reliability and stability
 • Security protection IP67
 • Power supply voltage 5VDC- 36VDC
 • Through EMC test
 • Certified by CE Standard
 • Small Dimensions(107 x 32 x 32mm)
 • Explosion - proof model available
 • Range: ±1G, ±5G and ±10G
 • DC Accuracy: 0.50% of reading
 • AC Accuracy: 1% of reading
 • DC measurement mode
 • AC measurement mode
 • Frequency response DC- 1KHz
 • Digital signals (RS485 and USB) output
 • Analog signal (XYZ, ±10V) output



GFP703 Magnetic Field Transmitter Specification:
Measurement Specification
Accuracy DC 0.50% of reading ± 0.05% of Full Scale 
AC ±1% of reading ± 0.05% of Full Scale, when fT < 400Hz;
±2% of reading ± 0.05% of Full Scale, when 
fT < 600Hz;
±7% of reading ± 0.05% of Full Scale, when 
fT < 1000Hz
Range X,Y,Z DC ±1G
AC* ±0.7G
R DC 1.73205G
AC* 1.2124G
Best Resolution X, Y, 
Z, R
DC 0.01mG(1nT) 0.05mG(5nT) 0.1mG(10nT)
AC 0.1mG(10nT) 0.5mG(50nT) 1mG(100nT)
Response [
DC - 1KHz 
Typical Temperature
Hysteresis <2nT for exposure to up to 2 x full scale
Zero Drift ±2nT/ 168 hours
Long-term Instability <0.1% over 1 year
Minimum Magnitudes
 for Rated AC Accuracy
Probes 3-Axis Fluxgate Probe
Digital Output
Function To connect with a computer, controller, PLC,
 and display instruments for digital signal output
USB Interface Cable: MAX. 2m; Data update rate: MAX. 30 Sample/s
RS485 Interface Cable: MAX. 500m; Data update rate: MAX. 30 Sample/s
Analog Output
Function Real-time analog voltages output: these are high-level differential voltages in proportion to the magnetic flux density
Range ±10 V
Proportion 10V in proportion to transmitter’s measurement range 
Frequency Response DC to 1KHz
Output Resistance < 100 Ω (short circuit protected)
SMART PC Software
Function 1, Automatically record and display trend graph; 
2, Display XYZ components and vector of magnetic flux density, 
maximum and minimum in real time; 
3, Choose DC Measurement Mode or AC Measurement Mode.
Transmitter Specification
Working Temperature -20℃  to  +60℃
Storage Temperature - 20°C  to  +75°C
Power Consumption (MAX)1.5W
Power Supply 5VDC- 36VDC
Dimension 107 mm W × 32 mm H × 32 mm D
Weight 200g
Certification CE Certification, EMC Certification
“*”: AC Range mentioned above refers to AC magnetic field measurement range after DC magnetic field is shielded, so if DC magnetic field is not shielded, and users want to measure magnetic field in AC measurement mode, AC Range is equivalent to the value that 0.7 times of DC Range minus DC magnetic field intensity. [sqrt(2)/2 ≈ 0.7]
GFP703 Transmitter’s Dimension and Terminals Description

Terminals Description
V_input+ DC Power Supply
(5VDC- 36VDC)
V_input-/ PWR GND
D+ Digital Signal Output(USB)
[Cable Length: max. 2m]
A Digital Signal Output(RS485)
[Cable Length: max. 500m]
Vx Analog Signal Output
(In proportion to Bx, ±10V)
Vy Analog Signal Output
(In proportion to By, ±10V)
Vz Analog Signal Output
(In proportion to Bz, ±10V)
SIG GND Analog Output Ground

Description Of Transmitter Type Selection

3-Axis Fluxgate Magnetic
 Field Transmitter
Range Cable Length Explosion- proof 
01: 1G
05: 5G
10: 10G
BLANK:1.5m (Default)
20m: 20m
GFP703 10 20m EX
    Example of Three-Axis Fluxgate Magnetic Field Transmitter: GFP703-10-20m-EX
     Note: Transmitter’s default cable length is 1.5m, and cable length can be customized.

Optional Accessories
Model Descriptions
PS2012 Power Adapter; Input: 100VDC- 230VDC; Output: 12VDC, 2A
S485USB RS485 to USB adapter
PUSB USB connector
The most popular Package
ORDER GFP703-01: Transmitter GFP703, Range of 1G, Accuracy of 0.50%, Cable of 1.5m
ORDER GFP703-05: Transmitter GFP703, Range of 5G, Accuracy of 0.50%, Cable of 1.5m
ORDER GFP703-10: Transmitter GFP703, Range of 10G, Accuracy of 0.50%, Cable of 1.5m

Service commitment

1. Quick-shipment

Equipment in stock will be shipped out in 5 work days after payment effected.

2. 30 Days Full-refund Guarantee

Unconditional refund in 30 days after the shipment date.(Buyer pays return shipping)

3. 12 Months Warranty

Warranty service period up to 12 months since the shipment

4. OEM & ODM

Best qualiy product with your own brand: we can design for you, manufacture for you!


BANKValartis Bank (Liechtenstein) AG
BANK ADDRESS: Schaaner Strasse 27, 9487 Gamprin-Bendern, Liechtenstein 
ACCOUNT NAMEColiy Asia Limited
IBAN USD accountLI92 0880 3103 4361 0000 0
IBAN EUR accountLI65 0880 3103 4361 0000 1

Delivery2-4 weeks

How to place the order: 
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