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Under $20 Gas Detectors

Shop the best prices on 1,331 great value under $20 gas detectors. Shopping for gas detectors is easy with Fruugo, with SALE discounts, offers and savings on Other, Shanghai Yangxin and Stormsure. Buy gas detectors online safely with Fruugo, with secure payment and fast shipping to Singapore.

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1 - 32 of 1,331
CO2 Meter Indoor Air Quality Monitor - Digital CO2 Detector with Real-Time Display
$21.95 Save $32.05 RRP: $54.00
Rm370 carbon monox detector
$13.95 Save $12.00 RRP: $25.95
CO2 Air Detector Carbon Dioxide Detector Agricultural Production Greenhouse CO2 Monitor White 25-26s
$16.95 Save $17.00 RRP: $33.95
Ordinary QRB1 Flame Detector Photosensitive Electric Eye Burner Detection Photoresistor Red QRB1 Photocell For Burner Waste Oil
$6.95 Save $3.00 RRP: $9.95
Air Quality Sensor Module for VOC, Formaldehyde, and ene Detection, Level 4 Monitoring Probe
$18.95 Save $11.00 RRP: $29.95
Gas Leak Detector Natural Gas Detectors Combustible Gas Detector
$13.95 Save $8.00 RRP: $21.95
5 in 1 CO2 Meter 400-5000 PPM Sensor Carbon Dioxide Detector Air Quality Monitor jy
$12.95 Save $11.00 RRP: $23.95
12V Gas Alarm Sensor for Propane Butane LPG Natural Gas in Motor Home Camper
$16.95 Save $24.00 RRP: $40.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set
$20.95 Save $20.00 RRP: $40.95
CO2 Drop Glass Checker Aquarium Carbon Dioxide Monitor Tiny CO2 Indicator
$7.95 Save $19.00 RRP: $26.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Zekai
$20.95 Save $21.00 RRP: $41.95
5 In 1 Air Quality Monitor Tvoc Hcho Temperature Humidity Co2 Meter, Usb Rechargeable Co2 Detector White
$20.95
Ms1100 Gas Sensor Module, High-precision Tvoc And Co2 Detection, Household And Laboratory Gas Quality Sensing
$12.95
Natural Gas Detector 0-10000ppm,sensitive Gas Leak Detector With Audible Visual Alarm,portable Gas Sniffer
$17.95
Combustible Gas Detector Gas Alarm Digital Combustible Gas Detection Instrument Gas Leak Tester Intelligent Air Quality Detector w SZRH
$20.95 Save $32.00 RRP: $52.95
ZE16B-CO Carbon Monoxide Gas Sensor Module
$11.95 Save $7.00 RRP: $18.95
SGP40 VOC Sensor Module Dual Gas Environment Detection Industrial Wide Temperature Range STEMMA QT/Qwiic Interface
$14.95 Save $8.00 RRP: $22.95
SGP41 VOC Sensor Module Dual Gas Environment Detection Industrial Wide Temperature Range STEMMA QT/Qwiic Interface
$15.95 Save $9.00 RRP: $24.95
2pcs Digital Carbon Monoxide (co) Detector Alarm Battery Powered
$12.95 Save $8.00 RRP: $20.95
Digital Naturall Gas Detector, Home Gas Alarm, Gas Leak Detector, High Sensitivity Lpg, Lng, Naturall Coal Leak Detection, Home/kitchen Alarm Monitor
$20.95 Save $38.05 RRP: $59.00
Combustible Gases Leak Detector Natural Gases Leakage Tester Combustible Gases Concentration Analyz
$18.95
Indoor Co2 Sensor Co2 Meter Digital Air Detector Intelligent Air Quality Analyzer
$9.95 Save $30.00 RRP: $39.95
5 In 1 Air Quality Detector Semiconductor Sensors Hcho Tvoc Co2 Temperature Humidity Tester Air Mon
$21.95
Gas Detector, Lpg/natural Gas/gas Leak Detector, Plug-in Sensor Monitor With Audible Alarm And Led Digital Display
$16.95 Save $33.00 RRP: $49.95
QRB1 Flame Detector Photoresistor Photosensitive Electric Eye for Burner Waste Oil Detection Red QRB1 Photocell
$17.95 Save $24.00 RRP: $41.95
MICS-5524 Air Quality Gas Sensor Module CO H2 Methane Ethanol Detection Board High Sensitivity for I2C for Arduino DIY
$12.95 Save $14.00 RRP: $26.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Hfmqv
$12.95 Save $13.00 RRP: $25.95
Household Gas Leak Detector Sensor 11x7x4cm ABS Material Alarm
$17.95 Save $10.00 RRP: $27.95
Gas Leak Detector Combustible Propane Methane Leak Warning EU Plug Combustible Gas Alarm Sensor for Home Security
$14.95
ZC13 Methane CH4 Sensor Module for Home Gas Safety Complete Device Development of Household Gas Leak Alarm
$18.95
MH-Z19 MH-Z19C IR Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor NDIR Accessories Edition 0610
$21.95 Save $37.05 RRP: $59.00
2PCS MQ3 Gas Sensor Module Dual Indicator Breath Alcohol Detection with TTL and Analog Output
$20.95 Save $10.00 RRP: $30.95