USS-FS21TAS Reed Switch Water Flow Sensor
Product Overview
USS-FS21TAS G1/2'' Connection
High-quality reed switch water flow sensor with normally open reed switch as sensing element, outputting passive switch signal. Suitable for water flow detection in water heaters, wall-hung boilers, water purification equipment and other applications. Features G1/2'' thread connection, low activation flow rate of 1.8L/min, working pressure up to 1.6MPa, with excellent reliability and stability.
Product Features
Reed switch/Normally open design, passive switch signal output
Wide voltage support up to 250V DC, suitable for multiple applications
Low activation flow rate 1.8L/min, high sensitivity, fast response
High working pressure 1.6MPa, maximum instant pressure 1.8MPa, reliable performance
Wide temperature range -10~120°C, adaptable to various environments
Standard G1/2'' thread connection, easy installation, orientation independent
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Technical Specifications
| Model | USS-FS21TAS |
|---|---|
| Sensing Element | Reed Switch / Normally Open |
| Signal Type | Switch Signal / Passive Signal |
| Maximum Voltage | 250V DC |
| Common Voltage | 5-24V DC |
| Maximum Current | DC: 0.3A |
| Activation Flow Rate | 1.8L/min |
| Maximum Flow Rate | No requirement |
| Working Pressure | 0.1-1.6MPa (Max instant pressure 1.8MPa) |
| Working Temperature | -10~120°C (Below 100°C for long-term use) |
| Connection Size | G1/2'', 1/2" Male Thread |
| Mounting Orientation | Any direction |
Specification Notes
1. Values listed are for reference only.
2. Actual performance may vary based on medium characteristics and installation environment.
3. Testing and calibration recommended before actual installation.
Usage Tips
Ensure no impurities in the medium, recommend installing filter at water inlet
Avoid installation in high vibration environments
Two-wire connection: Connect load in series between two signal wires, no polarity required
Ensure operating voltage does not exceed rating (Max 250V DC)
Keep magnetic materials away to prevent false triggering
Regularly inspect sensor status to ensure good contact
Load current must not exceed DC 0.3A, use relay for higher currents
Signal transmission distance should not exceed 50 meters, use shielded cable for long distances
Ensure arrow direction matches water flow direction during installation
Precautions
Avoid prolonged exposure to outdoor, humid or high-temperature environments.
Magnetic materials or magnetic fields may affect sensor performance.
Do not disassemble the product. Tampered products are not covered under warranty.
Reed switch is normally open type - contacts open when no water flow, close when water flows.
Do not directly switch high current loads; use relay for protection.
Always disconnect power before wiring for safety.
We reserve the right to update product specifications without prior notice.
Applications
Gas water heaters, electric water heaters, instant water heaters, wall-hung boilers, solar water heaters, heat pump systems, washing machines, dishwashers, smart sanitary equipment, water purifiers, water dispensers, water boilers, water vending machines, self-service vending machines, integrated water control systems, water controllers, IC card water meters, smart water meters, hot water meters, campus card systems, bathroom water control systems, industrial cooling systems, circulating water systems, boiler systems, central air conditioning, refrigeration equipment, water treatment equipment, chemical dosing systems, agricultural irrigation, pharmaceutical equipment, food & beverage processing, medical equipment, car wash equipment, swimming pool systems, intelligent machinery, instrumentation
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SEO Information
| Keywords | USS-FS21TAS reed switch water flow sensor, G1/2 water flow switch, passive flow sensor, normally open flow switch |
|---|---|
| Page Description | USS-FS21TAS reed switch water flow sensor with normally open reed switch, G1/2'' connection, activation flow 1.8L/min, working pressure 0.1-1.6MPa, temperature range -10~120°C, suitable for water heaters, boilers and flow detection applications. |
| Tags | USS-FS21TAS|reed switch|water flow sensor|passive signal|G1/2 connection |
| Static Page Name | uss_fs21tas_reed_switch_water_flow_sensor |