Brass Liquid Flow + Temperature Sensor


Brass Liquid Flow + Temperature Sensor


SKU: SEN-154 - Mfg Part Number: YF-B7


This high quality brass two-in-one sensor package is designed to monitor both liquid flow and liquid temperature within a pipe. Ideally suited for monitoring water consumption in irrigation control systems or other forms of liquid automation. Each side of the sensor has a 1/2″ BSPP G-1/2″ thread. The sensor has a three pin connector for the hall-effect flow sensor and a two pin connector for the temperature sensor.

Inside the housing, a small pinwheel with an attached magnet is spun by passing water; as the magnet makes each revolution, a hall effect sensor inside the housing outputs a pulse on the yellow wire. The sensor is best suited to flow rates between 1 and 25 liters per minute – flow rates below one liter per minute tend not to register accurately. The temperature sensor is an NTC 50K Thermistor.

For flow rates less than 6 liters per minute, we recommend looking at the YF-S401 with a higher resolution / lower flow rate.


  • Working Voltage: 5 to 15VDC
  • Max current draw: 15mA @ 5V
  • Working Flow Rate: 1 to 25 Liters/Minute
  • Working Temperature range: 1°C to 80°C
  • Maximum water pressure: 1.75 MPa
  • Thread: BSPP G1/2″
  • Temperature Sensor: NTC50K
  • Output duty cycle: 50% +-10%
  • Output Pulse High Level: 4.7V (VCC = 5V)
  • Output Pulse Low Level: 0.5V (VCC = 5V)
  • Max Liquid Temperature: 120℃
  • Frequency: F=(11*Q)Q=L/MIN±3%
  • 577 Pulses per liter


Only 1 left in stock (can be backordered)

SKU: SEN-154. Category: . Tags: , , .
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