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Under $20 Gas Detectors

Shop the best prices on 1,055 great value under $20 gas detectors. Shopping for gas detectors is easy with Fruugo, with SALE discounts, offers and savings on 9eight5, Blue Zoo, Shanghai Yangxin and more. Buy gas detectors online safely with Fruugo, with secure payment and fast shipping to Australia.

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1 - 32 of 1,055
Air Quality Monitor 5 in 1 Air Quality Detector C02 Detector White
$18.95 Save $5.00 RRP: $23.95
3 in 1 CO2 Meter Air Quality Monitor Handheld 5000Ppm CO2 Monitor Measurement Carbon Dioxide ℃/℉ Det
$22.95 Save $20.00 RRP: $42.95
CO2 Air Detector Carbon Dioxide Detector Agricultural Production Greenhouse CO2 Monitor White 25-26s
$19.95 Save $19.00 RRP: $38.95
Ordinary QRB1 Flame Detector Photosensitive Electric Eye Burner Detection Photoresistor Red QRB1 Photocell For Burner Waste Oil
$7.95 Save $3.00 RRP: $10.95
Gas Leak Detector Natural Gas Detectors Combustible Gas Detector
$14.95 Save $9.00 RRP: $23.95
Air Quality Sensor Module for VOC, Formaldehyde, and ene Detection, Level 4 Monitoring Probe
$21.95 Save $12.00 RRP: $33.95
5 in 1 CO2 Meter 400-5000 PPM Sensor Carbon Dioxide Detector Air Quality Monitor jy
$14.95 Save $12.00 RRP: $26.95
12V Gas Alarm Sensor for Propane Butane LPG Natural Gas in Motor Home Camper
$19.95 Save $27.00 RRP: $46.95
12V Gas Detection Alarm for Propane, Butane, LPG, and Natural Gas in RVs and Campers
$19.95 Save $28.00 RRP: $47.95
CO2 Drop Glass Checker Aquarium Carbon Dioxide Monitor Tiny CO2 Indicator
$8.95 Save $21.00 RRP: $29.95
Ordinary QRB1 Flame Detector Photosensitive Electric Eye Burner Detection Photoresistor Red QRB1 Photocell For Burner Waste Oil
$15.95 Save $31.00 RRP: $46.95
Fast Response Industrial Safety Sensory Probe Detection Gas Leak Detector for MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-9 Multicolor
$15.95
ZE16B-CO Carbon Monoxide Gas Sensor Module
$12.95 Save $7.00 RRP: $19.95
Magnetic Detector Meter Field Strength Test Instruments Monopoly Alarm Sound
$17.95
SGP40 VOC Sensor Module Dual Gas Environment Detection Industrial Wide Temperature Range STEMMA QT/Qwiic Interface
$15.95 Save $8.00 RRP: $23.95
SGP41 VOC Sensor Module Dual Gas Environment Detection Industrial Wide Temperature Range STEMMA QT/Qwiic Interface
$16.95 Save $9.00 RRP: $25.95
MT03 Air Quality Monitor CO2 Temperature Humidity Tester CO2 Detector Carbon Dioxide Detector
$20.95 Save $5.00 RRP: $25.95
MT03 Air Quality Monitor with Stand CO2 Temperature Humidity Tester CO2 Detector Carbon Dioxide Dete
$21.95 Save $5.00 RRP: $26.95
2pcs Digital Carbon Monoxide (co) Detector Alarm Battery Powered
$14.95 Save $8.00 RRP: $22.95
Sirne de poche rechargeable - Alarme personnelle audible 130DB avec porte-cls avec lampe de poche, sirne d'autodfense d'alarme panique,noir
$18.95 Save $13.00 RRP: $31.95
Indoor Co2 Sensor Co2 Meter Digital Air Detector Intelligent Air Quality Analyzer
$10.95 Save $33.00 RRP: $43.95
Gas Detector, Lpg/natural Gas/gas Leak Detector, Plug-in Sensor Monitor With Audible Alarm And Led Digital Display
$18.95 Save $40.05 RRP: $59.00
QRB1 Flame Detector Photoresistor Photosensitive Electric Eye for Burner Waste Oil Detection Red QRB1 Photocell
$19.95 Save $25.00 RRP: $44.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Hfmqv
$13.95 Save $14.00 RRP: $27.95
Household Gas Leak Detector Sensor 11x7x4cm ABS Material Alarm
$20.95 Save $11.00 RRP: $31.95
Gas Leak Detector Combustible Propane Methane Leak Warning EU Plug Combustible Gas Alarm Sensor for Home Security
$16.95
MQ-7 Gas Sensor, Carbon Monoxide CO Gas Alarm Sensor Detection Module
$13.95 Save $7.00 RRP: $20.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$11.95 Save $37.00 RRP: $48.95
Gas Leak Detector Combustible Propane Methane Leak Warning EU Plug Combustible Gas Alarm Sensor for Home Security unbrand
$14.95 Save $11.00 RRP: $25.95
Mini Handheld Gas Leak Detector Natural Gas Detector Combustible Gas Detector with Audible Alarm Ga
$20.95 Save $6.00 RRP: $26.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Hfmqv
$15.95 Save $15.00 RRP: $30.95
LCD LPG LNG Coal Natural Gas Leak Security Alarm Sensor Warning Detector
$20.95 Save $20.00 RRP: $40.95