YF S402B Water Flow Sensor Instruction Manual
- June 4, 2024
- Support
Table of Contents
YF S402B Water Flow Sensor
WATER FLOW SENSOR
- This product is light and convenient in appearance, small in volume and easy to install.
- The impeller is encrusted with stainless steel beads and is always wear-resistant.
- The sealing ring adopts upper and lower force structure never leak.
- Hall element USES the German import and encapsulated with potting glue, prevent water, never aging.
- All raw materials meet ROSH testing standards
Product Brief Introduction
Water flow sensor is mainly composed of plastic body flow rotor components and hall sensor in the water heater inlet, used to detect water flow, when the water through flow rotor components, magnetic rotor rotation and speed changes with the flow, hall sensor output pulse signal, feedback to the controller, the controller to judge the size of the water flow, adjust and control
Caution
- Severe impact and chemical erosion are strictly prohibited.
- No throwing or collision is allowed.
- Horizontal or vertical installation is fine
- The temperature of the medium should not exceed 1200 C.
Output Waveform Diagram
Lead Out Mode
Technical Parameters
| Range of application | Apply to all automatic gas water heater |
|---|---|
| base | 1、Custom Voltage |
| 2 、 Maximum operating current | 15 mA （DC 5V） |
| 3、Operating voltage range | DC 5～15 V |
| 4、Load capacity | ≤10 mA （DC 5V） |
| 5、Using temperature range | ≤80℃ |
| 6、Use humidity scope | 35%～90%RH（Frost free condition） |
| 7、Allow the pressure | < water pressure 1.75Mpa |
| 8、Storage temperature | -25～+80℃ |
| 9、Storage Relative Humidity | 25%～95%RH |
| Technical | 1、Output pulse high level |
| 2、Output pulse low level | <DC 0.5 V (input voltage DC 5 V) |
3、Precise
（Flow rate – pulse output）
| 0.3-6L/min
4、Output pulse duty ratio| 50±10%
5、Output Rise Time| 0.04μS
6、Output Fall Time| 0.18μS
7、Flow-pulse characteristic| Horizontal test pulse frequency (Hz)=[ 32*Q] ±3%(
horizontal test) (Q=L/min )
8、Iimpact resistance| The product is well packed and falls freely from the X,
Y and Z directions of 50cm height to the concrete surface without any
abnormality.
Accuracy changes by less than 3%.
9、 Insulation resistance| Insulation resistance between hall sensor and copper
valve body 100MΩ 以上。(DC 500V)
10、Heat resistance| In the 80 + 3 ℃ environment for 48 h, return to room
temperature for 1 to 2 h without exception, no crack, relaxation and parts,
expansion and deformation phenomenon, change within 10% accuracy.
11 Low temperature resistance| n the environment of -20 3 for 48h, no
abnormality was found in the return temperature of 1-2h, and the parts were
free from cracks, looseness and deformation, and the accuracy was within 10%
12、Moisture-proof| In 40 + 2 ℃, relative humidity 90% ~ 95% RH environment put
out
72 h after more than 1 m Ω insulation resistance.
13、Pull strength| The pulling force of 10N is applied on the drawing line for
1 minute, no looseness, break and performance change.
14、Drability| At room temperature, from the inlet to the 0.1 MPa water
pressure, to get through 1 S, disconnect 0.5 S for a cycle, to test 300000
times without exception.
Product Drawing
