DIGITEN G1-1/2" 1.5" Water Flow Hall Sensor Switch Meter Flowmeter Control 10-150L/min: Amazon.com: Industrial & Scientific
G1/2 Hall Effect Liquid Water Flow Sensor Switch Flowmeter Counter DC5V 1-30L/min Black YF-S201C - Walmart.com
1" Wired Irrigation Flow Meter Pulse Sensor, 1004-EX, Compatible with Rachio Gen 3, Rachio Pro Series, and Spruce Smart Controllers | Backyard Landscape Supply
Liquid Flow Meter - Plastic 1/2 NPS Threaded : ID 828 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Picomag Magnetic Flow Meter w/Temperature & Conductivity Sensor
Amazon.com: DIGITEN G3/4" Water Flow Hall Sensor Switch Flow Meter Flowmeter Counter 1-60L/min : Industrial & Scientific
YF-S201 Flow Sensor measures 1 to 30L/minute 2000362
DIGITEN G1/2" Water Flow Hall Sensor Switch Flow Meter 1-30L/min