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Under $20 Gas Detectors

Shop the best prices on 1,303 great value under $20 gas detectors. Shopping for gas detectors is easy with Fruugo, with SALE discounts, offers and savings on Other, Shanghai Yangxin, 9eight5 and more. Buy gas detectors online safely with Fruugo, with secure payment and fast shipping to Singapore.

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1 - 32 of 1,303
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
CO2 Meter Indoor Air Quality Monitor - Digital CO2 Detector with Real-Time Display
$21.95 Save $37.05 RRP: $59.00
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
5 in 1 CO2 Meter 400-5000 PPM Sensor Carbon Dioxide Detector Air Quality Monitor jy
$13.95 Save $10.00 RRP: $23.95
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 $9.00 RRP: $22.95
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 $15.00 RRP: $25.95
Antifreeze Detector Freezing Point Detector For Vehicle Urea Freezing Point Detector
$20.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set
$15.95 Save $8.00 RRP: $23.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$11.95 Save $12.00 RRP: $23.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$18.95 Save $18.00 RRP: $36.95
Voltage Detector Detector LED for Electrical Voltage Detector Electrician
$12.95 Save $14.00 RRP: $26.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv-YKY416
$12.95 Save $6.00 RRP: $18.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$11.95 Save $34.00 RRP: $45.95
FY8830 Portable Gas Leak Detector Natural Gas Detector
$13.95 Save $14.00 RRP: $27.95
BRJ-502D Plug-in Digital Natural Gas Detector High Sensitive Home Gas Alarm Combustible Gas Leak Monitor for Home KitchenEU PlugWhite SZRH
$21.95 Save $32.05 RRP: $54.00
High Precision Flaw Detection Gauge Line Width Defect Measure Line Width Defect Tool Line Defect Measuring Ruler For Line Width Defects And Measuring
$8.95 Save $45.05 RRP: $54.00
ENS160+AHT21 CARBON Dioxide CO2 ECO2 TVOC Air Quality and Temperature and Humidity Sensor Replace CCS811
$13.95 Save $7.00 RRP: $20.95
12V Gas Alarm Sensor LPG Propane Butane Leak Detector Waterproof LED Flash Sound Warning for RV Cam
$17.95 Save $7.00 RRP: $24.95
Portable Professional High-Accuracy Breathalyzers for with LCD Digital Display Personal Breath Dete
$18.95 Save $19.00 RRP: $37.95
Lead Paint Test Swabs Kit: 60 Pcs Lead Test Kit Swabs
$20.95 Save $14.00 RRP: $34.95
NDIR CO2 Carbon Dioxide Air Gas Sensor Module Infrared IR 400-5000ppm for CO2 Monitor Terminal Type
$19.95 Save $9.00 RRP: $28.95
Tds Meter Digital Water Tester- for Home, Well (Without Battery)
$7.95 Save $6.00 RRP: $13.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Hfmqv
$17.95 Save $17.00 RRP: $34.95
CO2 Air Detector Carbon Dioxide Detector Agricultural Production Greenhouse CO2 Monitor
$18.95 Save $18.00 RRP: $36.95
BRJ-502D Plug-in Digital Natural Gas Detector High Sensitive Home Gas Alarm Combustible Gas Leak Monitor for Home KitchenEU PlugWhite Edition 0125
$21.95 Save $47.05 RRP: $69.00
Gas Leak Detector Portable Nature Gas Detectors Methane Hexane Propane Sniffer for Home/Outdoor White Contains Battery
$20.95
SC8 Single-Channel (400-5000 Ppm) CO2 Sensor High-Precision Infrared CO2 Concentration Detection Module
$21.95
Portable Alcohol Tests Professional High Sensitivity Breathalyzer Alcohol Test Digital Breath Alcohol Tester
$22.95 Save $17.00 RRP: $39.95
Tuya Combustible Gas Detector Gas Alarm Digital Gas Detection Sensor Sound Alarm Smart Air Quality
$18.95