Brass Liquid Flow + Temperature Sensor


Availability: In Stock


SKU: SEN-154 Mfg Part Number: YF-B7 Category: Tags: , ,


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




May We Also Suggest…

Liquid Flow Meter – YF-S401
Price: $11.95


  Difficulty Level

Soldering Skill: N/A
Prototyping Skill: Beginner
Programming Skill: N/A

  Product Certifications

  Product Attributes

Weight: 120 g

  Warranty Policy

This product has a 30 Day Warranty from the date of delivery. The item must not be modified, abused, incorrectly hooked up, or used for purposes outside the original scope of design.

  Return Policy

This product is returnable Within 14 Days of delivery for a store credit. Item must be unopened, unused, and in re-saleable condition.

More Information:
For more information on our Warranty and Return Policies, please consult our   Terms of Service


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