The performance testing equipment for water flow sensors (Hall/turbine/electromagnetic) in water purifiers is designed based on six dimensions: flow accuracy, linearity, response speed, durability, sealing, and electrical characteristics, strictly in accordance with the industry standards for household water purifiers (QB/T 4143-2019) and the general specifications for sensors. The following is a complete and professional list of testing conditions and content:

1、 Core testing content (essential equipment items)

1. Traffic characteristic testing

-Test content: Flow indication error, linearity, repeatability

-Test conditions: - Test medium: Room temperature clean water (25 ± 5 ℃)

-Test pressure: Inlet pressure 0.1-0.4MPa (rated working water pressure of water purifier)

-Flow range: 0.5-15 L/min (covering the common flow range of water purifiers)

-Judgment criteria: indication error ≤ ± 5% (QB/T 4143-2019 requirements for household water purifiers)

2. Dynamic response performance testing

-Test content: Start traffic (minimum start traffic), response time, stop hysteresis

-Test conditions: - Water flow rapidly steps from 0 to rated flow rate

-Record sensor signal output delay

-Requirement: Start flow rate ≤ 0.3 L/min; Response time ≤ 100ms

3. Sealing and pressure resistance testing

-Test content: Shell pressure resistance strength, sealing leakage

-Test conditions: - Water pressure: 1.5 times the rated working pressure (0.6MPa), hold pressure for 5 minutes

-Medium: Clear water

-Judgment: No rupture, no leakage (GB/T 15091-2014 Sealing standard for household water purifiers)

4. Electrical performance testing

-Test content: working voltage, current, signal amplitude, high and low levels, insulation resistance

-Test conditions: - Power supply voltage: DC 5V/12V (rated voltage of sensor)

-Environmental temperature: 25 ℃

-Requirement: The signal waveform is stable and there are no missing pulses; Insulation resistance ≥ 20M Ω

5. Durability/lifespan testing (reliability)

-Test content: water supply life, switch fatigue, cold and hot shock

-Test conditions: - Circulating flow rate: Rated flow rate

-Cycle times: ≥ 500000 times

-Water temperature cycle: alternating cold and hot temperatures between 5 ℃ and 45 ℃

-Judgment: After testing, the accuracy of the flow rate has decreased by ≤± 3%

6. Environmental adaptability testing

-Test content: high and low temperature, humid heat, vibration

-Test conditions: - Operating temperature: -10 ℃~60 ℃

-Humidity: 93% RH

-Vibration: frequency 10-100Hz