Technical parameters compiled from the manufacturer data sheet and reference documentation.
| Technical Specifications |
| Type Designation |
| Model |
FD-G125 |
| Analog input (for volume conversion) |
M8 4-pin connector (female), analog current input (4 to 20 mA), input resistance: 100Ω or less |
| Power Supply |
| Power supplied to pressure sensor |
Supply voltage: Equivalent to voltage applied to the FD-G, Supply current:70 mA or less (analog output of the pressure sensor included) |
| Power supply Power voltage |
20 to 30 VDC including 10% ripple (P-P), Class 2 |
| Power consumption |
350 mA or less at 20 V, 290 mA or less at 24 V, 230 mA or less at 30 V (load current excluded) (analog output of the pressure sensor excluded), ; 550 mA or less at 20 V, 490 mA or less at 24 V, 430 mA or less at 30 V (Maximum load current excluded) (analog output of the pressure sensor excluded) |
| Inputs & Outputs |
| Supported pipe materials |
Iron, steel, stainless steel |
| Supported fluids |
Air, Nitrogen, other gases |
| I/O wiring connection port |
M12 4-pin connector (male) |
| Communication & Interfaces |
| Communication interface USB |
USB 2.0 |
| Ethernet Standard |
IEEE 802.3u (100BASE-TX) |
| Connector |
M12 connector (female, D-code) |
| Mechanical |
| Protection circuit |
Power supply reverse connection protection, power supply surge protection, short-circuit protection for each output, surge protection for each output |
| Environmental resistance Enclosure rating |
IP65/67 (IEC 60529) |
| Mounting/damping bracket |
SUS304 |
| Weight |
Approx. 2.7 kg |
| Environmental |
| Fluid temperature |
0 to 60ºC 32 to 140 °F |
| Ambient temperature |
Detection head: −10 to +60°C 14 to 140°F (no freezing), display unit: −10 to +55°C 14 to 131°F (no freezing) |
| Relative humidity |
5 to 85%RH (no condensation) |
| Vibration resistance |
10 to 500 Hz, power spectral density: 0.816 G /Hz, XYZ axes |
| Shock resistance |
100 m/s , 16 ms pulse, XYZ axes, 1000 times for each axis |
| Other |
| Pipe size DN (Diameter Nominal) |
100 A, 125 A |
| NPS (Nominal Pipe Size) |
4", 5" |
| Outer diameter of pipe |
ø111 to 117 mm 4.37" to 4.61" , ø138 to 144 mm 5.43" to 5.67" |
| Pipe thickness |
3.1 to 6.8 mm 0.122" to 0.27" |
| Recommended pressure |
0.4 MPa or greater (58 PSI or greater) |
| Rated velocity of flow range |
Up to 15 m/s |
| Actual flow rate range (typical) m /h |
Pipe size 100 A: 470.0 ; Pipe size 125 A: 720.0 |
| L/min |
Pipe size 100 A: 7800 ; Pipe size 125 A: 12000 |
| CFM |
Pipe size 100 A: 280.00 ; Pipe size 125 A: 420.00 |
| 20°C 68°F 80 psi 0.55 MPa |
Pipe size 100 A: 1681.49 ; Pipe size 125 A: 2522.23 |
| 20°C 68°F 100 psi 0.69 MPa |
Pipe size 100 A: 2036.63 ; Pipe size 125 A: 3054.95 |
| 20°C 68°F 120 psi 0.83 MPa |
Pipe size 100 A: 2391.78 ; Pipe size 125 A: 3587.67 |
| Display |
QVGA 2.2" LCD color monitor |
| Consumption/leakage amount |
0.1 m , 1 L, 1 CF |
| Response time |
1.0 s/2.5 s/5.0 s/10.0 s/30.0 s/60.0 s/120.0 s/200.0 s (variable) |
| Measurement accuracy Between 10 and 100% of F.S. |
±2.0% of RD |
| Between 1 and 10% of F.S. |
±1.0% of F.S. |
| Zero point error |
±0.15% of F.S. |
| Static leakage repeatability |
±1.0% of RD |
| Hysteresis |
Variable |
| Flow units |
CFM(S), CFM, m /h (N), m /h (S), m /h, L/min (N), L/min (S), L/min |
| Detection mode (switchable) ch.1 |
Instantaneous flow mode/area mode/pulse (+) mode/integrated flow mode/warning mode (consump) |
| ch.2 |
Instantaneous flow mode/area mode/pulse (−) mode/warning mode (leak)/error output mode/analog output/integrated flow reset/flow rate zero input/origin adjustment input |
| Transmission rate |
100 Mbps |
| Cable |
Category 5 or higher STP (shielded twisted pair) or UTP (unshielded twisted pair) cable |
| Network function |
Modbus TCP, EtherNet/IP™, IO-Link |
| Recording capacity Consumption amount/ leakage amount |
Approx. 5 years |
| Events |
100 |
| Detection head |
Body: PPS/SUS304, rear surface: rubber |
Model variants, options and firmware revisions can affect fitment. Before ordering the Keyence FD-G125 flow sensor, share your existing part number or project requirements and our team will cross-reference comparable in-stock Keyence units and verify compatibility. This listing is provided by an independent industrial-automation distributor; brand names and part numbers are used for identification only.
Independent supplier: Keyence part FD-G125 is supplied by SHLY-PLC, an independent industrial-automation distributor. Brand names and part numbers are used for product identification and remain the property of their respective owners; this listing is not affiliated with, sponsored or endorsed by the manufacturer.
A: Each FD-G125 is inspected and functionally checked before sale. Contact us for the current stock condition and quantity.
A: In-stock orders placed before 14:00 ship the same business day. Standard worldwide delivery is about 5-8 business days, express shipping is available and orders over $500 ship free.
A: Yes. Share your existing part number or application and our technical team will verify compatibility and provide cross-references to comparable in-stock models.