Model YFB7 Flow Sensor and Meter Module Key benefits Accurate, repeatable water flow measurement from 1 to 25 L/min with ±3% accuracy, suitable for monitoring, control, and data logging. 660 pulses per liter pulse output allows precise volume counting and easy integration with microcontrollers, counters, and PLCs. Wide operating voltage range DC3.5 to 24 V enables compatibility with a broad range of control systems and power supplies. Robust mechanical construction: copper body, tested sealability, and 1.75 MPa pressure resistance for reliable longterm use in pressurized systems. Compact dimensions and standard G1/2 interface make installation straightforward in many plumbing and equipment setups. Main functions and performance Model: YFB7. Interface size: 4 points (G1/2). Operating voltage range: DC 3.5 to 24 V. Output pulse: level greater than 4.7 V when input voltage is DC 5 V. Output pulse duty cycle: 50% ±10%. Pulse rate: 660 pulses per liter. Pulses per minute equals 660 times Q, where Q is flow in L/min. Overall pulse accuracy ±3%. Flow measurement range: 1 to 25 L/min ±3%. Pressure resistance: 1.75 MPa. Sealability: each opening closed and subjected to 1.7 MPa hydraulic test for 1 minute with no leakage or deformation. Insulation resistance: greater than 100 MOhm. Material: copper. Physical size: diameter 13.7 mm, outer diameter 20.3 mm. Screw length: long teeth 16 mm, short teeth 10.5 mm. Display and user controls Temperature display range: 99 to 999 C. Temperature unit selectable between C and F by pressing the plus key. Flow meter mode: the display will automatically switch to show current flow rate. When no flow is present, the unit shows total elapsed time only; in water pressure mode only time is shown. Time units: DAY indicates days and HRS indicates hours. Hold the plus key to change the time unit. Flow units: LPM indicates liters per minute and GPM indicates gallons per minute. Use the number key to switch flow units. Screen navigation: the current screen number appears on a secondary display; 00 indicates the KSETING screen. Power indicator: the battery indicator blinks when battery level is low to prompt replacement. Visual feedback: in flow meter mode a faucet animation displays water droplets when flow is detected. Compatibility and integration Standard G1/2 interface and compact form factor suit domestic plumbing, filtration systems, dispensers, small pumps, and OEM equipment. Pulse output and standard voltage range simplify connection to microcontrollers, data loggers, counters, and industrial controllers for automated monitoring and control. Use scenarios Home water filtration system: inline flow measurement to track total filtered volume, trigger filter replacement alerts, and log daily consumption. Smallscale production or laboratory setups: flow monitoring and pulse output for precise dosing or recording of liquid usage with a microcontroller or data acquisition system. Beverage dispensers or coffee machines: compact inline sensor to measure dispense volume, control dispensing cycles, and prevent overfill. What makes it stand out Reliable pulse output (660 p/L) and wide supply voltage make the YFB7 easy to integrate into both hobby and industrial control projects. Copper construction and validated hydraulic sealing provide durability and confidence in pressurized applications. Builtin display and configurable units let users view flow, time, and temperature directly without additional instruments. Includes YFB7 flow sensor and meter module with G1/2 interface and two screw length options as specified. Technical note For correct pulse level and duty cycle, verify supply voltage and input conditioning on the receiving controller. Follow system grounding and wiring practices when integrating the sensor into electronic control circuits.