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Under $20 Gas Detectors

Shop the best prices on 1,130 great value under $20 gas detectors. Shopping for gas detectors is easy with Fruugo, with SALE discounts, offers and savings on Other and Shanghai Yangxin. Buy gas detectors online safely with Fruugo, with secure payment and fast shipping to Australia.

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1 - 32 of 1,130
3 in 1 CO2 Meter Air Quality Monitor Handheld 5000Ppm CO2 Monitor Measurement Carbon Dioxide ℃/℉ Det
$22.95 Save $21.00 RRP: $43.95
Air Quality Monitor 5 in 1 Air Quality Detector C02 Detector White
$18.95 Save $5.00 RRP: $23.95
Rm370 carbon monox detector
$15.95 Save $14.00 RRP: $29.95
CO2 Air Detector Carbon Dioxide Detector Agricultural Production Greenhouse CO2 Monitor White 25-26s
$19.95 Save $20.00 RRP: $39.95
6 In 1 Air Quality Detector Lcd Large Screen Co2 Meter Pm2.5 Pm10 Hcho Tvoc Co Co2 Co Carbon Dioxide Formaldehyde Monitor
$13.95 Save $6.00 RRP: $19.95
Air Quality Sensor Module for VOC, Formaldehyde, and ene Detection, Level 4 Monitoring Probe
$21.95 Save $12.00 RRP: $33.95
Ordinary QRB1 Flame Detector Photosensitive Electric Eye Burner Detection Photoresistor Red QRB1 Photocell For Burner Waste Oil
$7.95 Save $4.00 RRP: $11.95
5 in 1 CO2 Meter 400-5000 PPM Sensor Carbon Dioxide Detector Air Quality Monitor jy
$14.95 Save $13.00 RRP: $27.95
Gas Leak Detector Natural Gas Detectors Combustible Gas Detector
$14.95 Save $9.00 RRP: $23.95
Rm370 carbon monox detector - ZCL1978
$18.95 Save $50.05 RRP: $69.00
Automobile Air Conditioning Fluorescent Leak Detectors Syringe
$13.95 Save $6.00 RRP: $19.95
2pcs Mq-9 Mq9 Liquefied Flammable Methane Gas Sensor Module
$3.95 Save $5.00 RRP: $8.95
Co2 Air Detector Carbon Dioxide Detector Agricultural Production Greenhouse Co2 Monitor White
$10.95 Save $17.00 RRP: $27.95
LCD Carbon Monoxide Detector, Gas Sensor Alarm for Home Safety
$12.95 Save $21.00 RRP: $33.95
12V Gas Alarm Sensor Alarm Propane Butane LPG Natural Motor Home Camper SZRH
$19.95 Save $39.05 RRP: $59.00
-SGP30 ECO2 Air Quality Gas Sensor Module TVOC Detection Chip Compatible for Demo Board
$15.95
Gas Leak Detector Natural Gas Detectors Combustible Gas Detector
$19.95 Save $7.00 RRP: $26.95
Wifi Smart Gas Leakage Detector Highly Sensitive Combustible Gas Alarm Lpg Natural Gas Sensor Eu Plug
$20.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set
$17.95 Save $8.00 RRP: $25.95
12V Gas Alarm Sensor LPG Propane Butane Leak Detector Waterproof LED Flash Sound Warning for RV Camping Marine Safety
$19.95 Save $9.00 RRP: $28.95
Gas Leak Detector Natural Gas Detectors Combustible Gas Detector
$17.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$12.95 Save $13.00 RRP: $25.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$20.95 Save $20.00 RRP: $40.95
Voltage Detector Detector LED for Electrical Voltage Detector Electrician
$13.95 Save $16.00 RRP: $29.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv-YKY416
$14.95 Save $7.00 RRP: $21.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$13.95 Save $39.00 RRP: $52.95
Ms1100 Gas Sensor Module, High-precision Tvoc And Co2 Detection, Household And Laboratory Gas Quality Sensing
$12.95
MQ-3 Gas Sensor Module for Ethanol and Alcohol Detector E-Commerce Condition New Voltage Regulator Type
$14.95 Save $9.00 RRP: $23.95
FY8830 Portable Gas Leak Detector Natural Gas Detector
$16.95 Save $16.00 RRP: $32.95
ENS160+AHT21 CARBON Dioxide CO2 ECO2 TVOC Air Quality and Temperature and Humidity Sensor Replace CCS811
$15.95 Save $8.00 RRP: $23.95
12V Gas Alarm Sensor LPG Propane Butane Leak Detector Waterproof LED Flash Sound Warning for RV Cam
$20.95 Save $7.00 RRP: $27.95
Ordinary QRB1 Flame Detector Photosensitive Electric Eye Burner Detection Photoresistor Red QRB1 Photocell For Burner Waste Oil 25-26
$12.95 Save $13.00 RRP: $25.95