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Under $20 Flow Meters & Controllers

Shop the best prices on 4,820 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 4,820
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 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
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
22680-aa310 Air Flow Sensor Air Flow Meter Sensor For
$19.95
Cold Water Meter, Flow Water Meter For Garden Home Using Water Flow Meter Dn15
$14.95 Save $15.00 RRP: $29.95
0.1-1.5LPM 1.5L Oxygen Flow Meter Flowmeter with Control Valve for Oxygen Air
$13.95 Save $7.00 RRP: $20.95
Durable G1/4" Water Liquid Temperature Measurement Flow Sensor Meter Hall Effect
$19.95
Easy to Install 2 Points PE Pipe Water Flow Sensor Hall Flowmeter
$20.95
1/4 NPT Water Sensors Effect Sensors Meter Counter Hose 0.3-6L/Min for Reverse Filter unbrand
$11.95
Floor heating flow meter for water floor heating collector, water flow indicator
$21.95
1pc DF9-40 High Precise Resistance Type Thin Film Pressure Sensor Force Sensor (0-500g)
$8.95 Save $10.00 RRP: $18.95
1pc DF9-40 High Precise Resistance Type Thin Film Pressure Sensor Force Sensor (0-10kg)
$8.95 Save $10.00 RRP: $18.95
Film Pressure Sensor Environmental Protection Oxidation Resistance Durability Force Sensor RPC30ST
$12.95 Save $12.00 RRP: $24.95
Water Flow Meter Flowmeter Switch Sensor 1.2mm Diameter Barb Connector with 25cm Wire
$15.95 Save $16.00 RRP: $31.95
Portable Spirometer Peak Flow Meter Meter Expiratory Flow for Lung Asthma Detector Breath Function Monitor for Adult
$20.95 Save $17.00 RRP: $37.95
4-20MA Signal Generator 4-20MA Current Generator Adjustable Analog Quantity Current Signal Generator Module
$17.95
Portable Peak Flow Meter & PEF Spirometer for Asthma and Lung Function Monitoring
$14.95 Save $11.00 RRP: $25.95
High Performance 1/4" Water Flow Switch Plastic Water Flow Switch Water Flow Control Sensor for Water Purifier Dispenser Multicolor
$20.95
Water Flow Sensor for Lay Z Spa - Fix E02 Error with Airjet Hydrojet
$20.95 Save $22.00 RRP: $42.95
3.7-12V Heated Clothing Temperature Controller Replacement Button with High Conductivity and Compatibility for Various Apparel
$20.95 Save $11.00 RRP: $31.95
G3/4" Male Thread Brass Water Flow Sensor Hall Effect Sensor Switch- Flow Meter
$20.95 Save $9.00 RRP: $29.95
0.01 Precision Two-Wire 4-20MA Current Loop Signal Generator PLC Inst ent-Good
$10.95 Save $14.00 RRP: $24.95
Gas Flow Meter Tester Air Adjustable Panel Measure Control Flowmeter 10?1000ml/min
$13.95 Save $13.00 RRP: $26.95