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Under $20 Flow Meters & Controllers

Shop the best prices on 4,800 great value under $20 flow meters & controllers. Shopping for flow meters & controllers is easy with Fruugo, with SALE discounts, offers and savings on Ydcy, Asiv, Lichifit and more. Buy flow meters & controllers online safely with Fruugo, with secure payment and fast shipping to Singapore.

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1 - 32 of 4,800
JR-A568-5B Hall Water Flow Sensor Switch for Instant Electric Water Heater Accessories Lichifit
$19.95 Save $3.00 RRP: $22.95
Portable Spirometer Peak Flow Meter Meter Expiratory Flow for Lung Asthma Detector Breath Function Monitor for Adult
$18.95 Save $21.00 RRP: $39.95
2025 Portable Peak Flow Meter for Asthma & Lung Function - Personal PEF Spirometer
$21.95 Save $42.05 RRP: $64.00
1Pcs Water Flow Sensor DN25 DC3.5-24V 1 Inch 2-100L/Min Hall Flowmeter Heat Pump Water Heater Flow
$18.95
2025 Portable Peak Flow Meter for Asthma & Lung Function - Personal PEF Spirometer
$11.95 Save $23.00 RRP: $34.95
for Lay Z Spa Water Flow Sensor airjet hydrojet fix E02 Code, Flow Sensor FIX E02 for Spa Lay Z AirJet hwy
$14.95
Portable Spirometer Peak Flow Meter Meter Expiratory Flow For Lung Asthma Detector Breath Function M
$9.95 Save $9.00 RRP: $18.95
Acrylic Variable Area Flow Meter for Gas, 0.1-1L/MIN, Adjustable Panel Mount Rotameter for Air Flow Rate Monitoring
$20.95 Save $13.00 RRP: $33.95
2025 New Protable Personal Spirometer Peak Flow - Expiratory Flow Meter - Spirometry Lung Function
$13.95 Save $3.00 RRP: $16.95
MAF Mass Air Flow Sensor Meter AF10043 for Yukon XL 1500 Sierra Escalade Silverado Suburban 1500 2500 Tahoe - Replaces 25168491 25318411
$20.95 Save $21.00 RRP: $41.95
Water Flow Switch Water Flow Control Sensor Stable Precision Controller
$18.95 Save $45.05 RRP: $64.00
Accurate Gas Flow Meter for Argon and CO2, Simplified Design for Practical Use
$10.95 Save $6.00 RRP: $16.95
Digital Water Flow Meter IPX6 Outdoor Garden Hose Water Calculate Consumption Water Flow Rate 3/4inc
$21.95
360Rotatable Duckbill Water Outlet Plastic Aquarium Water Outlet Duckbill Nozzle Pipe End Outflow Pump End Plumbing unbrand
$20.95
1Pc G1/2" Copper Hall Effect Liquid Water Flow Sensor Switch Flowmeter Meter 1-30L/min
$3.95 Save $2.00 RRP: $5.95
LSJ-XGA Acrylic Water Flow Meter G1/4in Blue 43x55x24mm
$20.95 Save $9.00 RRP: $29.95
Stainless Steel Manifold to Replace the Meter for Floor Heating Water Separator Accessories
$9.95 Save $5.00 RRP: $14.95
Water flow meter for PC cooling with G1/4" 8-impeller indicator
$21.95 Save $42.05 RRP: $64.00
Adjustable High Precision Water Level Control Sensor with Flow Switch Function for 100V Systems
$13.95 Save $16.00 RRP: $29.95
DN25 Flow Sensor Turbine Flow Meter Water Flow Sensor Industrial Agricultural Flow Meter
$18.95 Save $6.00 RRP: $24.95
Argon Co2 Gas Flow Meter Peashooter Scale Tester Measure For Mig Tig Welder Welding W315
$14.95 Save $7.00 RRP: $21.95
Hose Barbed Water Flow Sensor 5-18v 6mm for Coffee Machine Hot Water Purifier
$20.95
Water Flow Switch- Control Flowmeter DN8 Quick-Connect Flow Sensor Male Thread
$20.95
1.25" 32mm Flowmeter Counter Water Counter Water Flow Sensor for Waterwork
$19.95
AM03 Alcohol Breathalyzer 10s Quick Response Alkohol Sensor
$20.95 Save $6.00 RRP: $26.95
26mm 3/4" PT Thread Connector 120W Pump Water Flow Sensor Switch
$17.95 Save $25.00 RRP: $42.95
Water Flow Switch Sensor Water Flow Control Switch Precision Controller Stable
$16.95
Mini Air Compressor Dial Meter Hydraulic Pressure Manometer 0-60psi 0-4bar
$21.95 Save $6.00 RRP: $27.95
0‑5LPM Adjustable Air Flow Meter High Accuracy Flowmeter with Scales Panel Mount Type
$19.95 Save $30.00 RRP: $49.95
High Precise 500g Resistancetype Thin Film Pressure Sensor Force Sensor
$11.95 Save $28.00 RRP: $39.95
Multiple Styles Flow Sensor Control Meter Flowmeter Counter 0.2-8L/min Water Flow Sensor Switch Drinking Fountain Coffee
$20.95
2pcs 20g~2kg High Precise Resistance Type Thin Film Pressure Sensor Force Sensor
$15.95