The operating temperature range of this gear flow sensor is 0~80°C and the humidity range is 35~90%RH (no frost). Its housing is sturdy, compact, and long-term wear-resistant, and it can provide flow measurement in harsh industrial and outdoor environments.
Features
- The gear flow sensor is compact in design, saves space, is easy to install, and adapts to a variety of installation environments.
- It adopts the volumetric flow measurement principle, accurately calculates the fluid flow rate by rotating gears, and provides high-precision measurement data.
- The gear is inlaid with stainless steel beads to effectively enhance wear resistance and extend service life.
Specification
Model |
ATO-AFD7005 |
ATO-AFD7013 |
ATO-AFD7020 |
ATO-AFD7050 |
ATO-AFD7060 |
Flow range (L/min) |
0.5~5 |
0.7~13 |
0.8~20 |
0.5~50 |
3~60 |
Thread type |
G1/4 |
G3/8 |
G1/2 |
G3/4 |
G1 |
Pipe diameter |
DN8 |
DN10 |
DN15 |
DN20 |
DN25 |
Using temperature range |
0~80℃ |
Using humidity range |
35~90%RH (no frost) |
Accuracy |
Within 1%FS (liquid is water or diesel) |
Repeatability |
<2.0% |
Contact liquid material |
ETFE/PPS/SuS304 (stainless steel) |
Pressure level |
Water pressure below 1.75Mpa |
Ambient temperature |
-25~80℃ |
Ambient humidity |
25~95%RH |
Power supply |
5~24VDC |
Signal output |
Three-wire system 5~24V, GND, signal output |
Output pulse high level |
Greater than DC 4.5V (input voltage DC 5V) |
Output pulse low level |
Less than DC 0.5V (input voltage DC 5V) |
Output pulse duty cycle |
50±10% |
Output rise time |
0.04μs |
Output fall time |
0.18μs |
Flow-pulse characteristics |
Horizontal test pulse frequency F(Hz)=[K*Q]±1%(horizontal test) (K is the frequency coefficient, Q is the flow rate L/min) |
Dimension (mm)

Model |
ATO-AFD7005 |
ATO-AFD7013 |
ATO-AFD7020 |
ATO-AFD7050 |
ATO-AFD7060 |
Body size (A) |
⌀60.5 |
⌀67 |
⌀79 |
Body height (B) |
36.5 |
42.5 |
47.5 |
Internal thread (C) |
G1/4 |
G3/8 |
G1/2 |
G3/4 |
G1 |
Pin Definition

Line sequence |
Output pin description |
1 brown |
Power supply positive 5~24V DC power supply |
2 yellow |
Power supply negative |
3 blue |
Signal output |
Installation Instructions
When piping the gear flow sensor, use a wrench to pipe the metal part (pipe fittings) that is integrated with the piping. If a wrench is used on other parts, the flow switch may be damaged. In particular, a wrench cannot be used on the M12 connector. Otherwise, the connector may be damaged.
Note: Do not allow the sealing tape to mix into the pipe when installing the piping. Do not allow the piping to leak due to looseness when connecting. If tightening beyond the tightening torque range, the switch may be damaged. If assembled with less than the specified tightening torque, the connection thread may loosen.
Safety torque table
Thread |
G1/4 |
G3/8 |
G1/2 |
G3/4 |
G1 |
Applicable torque range |
22~24 N·m |
22~24 N·m |
28~30 N·m |
28~30 N·m |
28~30 N·m |
Torque safety range |
<200N·m |
Applications

Tips: Working principle of gear flow sensor
Gear flow sensor is a flow meter that measures volume flow with high precision. Its working principle is the positive displacement principle. The flow of the medium causes the gear to rotate. The rotation of the gear drives the rotation of the magnetic pole, which is then scanned by the non-contact Hall sensor. Continuous rotation scanning generates continuous pulses, and finally generates a frequency signal that is proportional to the flow, and then the flow value is obtained. This gear liquid flow sensor based on the standard volumetric principle has a pair of meshing gears as rotors in the cavity. The two gears and the cavity can each form a fixed volume, called the standard volume. The flow rate is measured by calculating the number of flows that pass through the standard volume within a certain period of time.