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Under $20 Gas Detectors

Shop the best prices on 1,070 great value under $20 gas detectors. Shopping for gas detectors is easy with Fruugo, with SALE discounts, offers and savings on Shanghai Yangxin. Buy gas detectors online safely with Fruugo, with secure payment and fast shipping to Singapore.

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1 - 32 of 1,070
Rm370 carbon monox detector - ZCL1978
$16.95 Save $47.05 RRP: $64.00
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
$17.95 Save $17.00 RRP: $34.95
5 in 1 CO2 Meter 400-5000 PPM Sensor Carbon Dioxide Detector Air Quality Monitor jy
$13.95 Save $10.00 RRP: $23.95
Gas Leak Detector Natural Gas Detectors Combustible Gas Detector
$13.95 Save $9.00 RRP: $22.95
Air Quality Sensor Module for VOC, Formaldehyde, and ene Detection, Level 4 Monitoring Probe
$18.95 Save $11.00 RRP: $29.95
Halogen Gas Detector 501000ppm Sound Light Alarm Air Conditioning Refrigerant Freon Leakage Tester
$17.95 Save $9.00 RRP: $26.95
MICS-6814 Gas Sensor Carbon Monoxide CO NO2 NH3 Nitrogen Oxygen Air Quality Detection Numerical Sen
$18.95 Save $9.00 RRP: $27.95
Household Gas Detector, Real-time Alarm to Prevent Leakage, 1.3W Low Power Consumption, Kitchen Gas Safety Detector
$17.95 Save $10.00 RRP: $27.95
Gas Detector, Intelligent False Alarm Prevention and Long Battery Life, Multi-Gas Sensing, Home Safety Alarm Device
$21.95 Save $13.00 RRP: $34.95
Natural Gas Detector, Real-time Monitoring and Accurate Detection, AC220V/DC12V, Kitchen Household Gas Alarm
$17.95 Save $10.00 RRP: $27.95
Combustible Gases Leak Detector Natural Gases Leakage Tester Combustible Gases Concentration Analyz
$19.95
High Precision Flaw Detection Gauge Line Width Defect Measure Line Width Defect Tool Line Defect Measuring Ruler For Line Width Defects And Measuring
$9.95 Save $59.05 RRP: $69.00
MQ-7 Gas Sensor, Carbon Monoxide CO Gas Alarm Sensor Detection Module
$12.95 Save $6.00 RRP: $18.95
Air Quality Monitor 5 in 1 Air Quality Detector C02 Detector HCHO TVOC Tester LCD Temperature Humid
$18.95 Save $2.00 RRP: $20.95
Formaldehyde Monitor Carbon Dioxide Detector TVOC Detector Temperature and Humidity CO 2 Air Qualit
$18.95 Save $45.05 RRP: $64.00
High-quality Air Monitor Co2 Carbon Dioxide Detector Air Quality Temperature Humidity Monitor Fast Measurement Meter-dwdz
$19.95 Save $19.00 RRP: $38.95
suitable for QRB1 Flame Detector Photosensitive Electric Eye Burner Detection-jc
$13.95 Save $7.00 RRP: $20.95
SGP41 VOC Sensor Module Dual Gas Environment Detection Industrial Wide Temperature Range STEMMA QT/Qwiic Interface
$17.95
Rm370 carbon monox detector - ZCL1978,__a
$18.95 Save $19.00 RRP: $37.95
2X Gas Leak Detector Combustible Propane Butane Methane Leak Warning Combustible Gas Alarm Sensor EU Plug
$19.95
2026 12V Gas Alarm Sensor Alarm Propane Butane LPG Natural Motor Home Camper
$13.95 Save $14.00 RRP: $27.95
Gas Leak Detector Combustible Propane Butane Methane Leak Warning Combustible Gas Alarm Sensor for Home Security EU Plug
$15.95 Save $4.00 RRP: $19.95
MS1100 Gas Sensor Module, High-Precision TVOC and CO2 Detection, Household and Laboratory Gas Quality Sensing
$14.95 Save $5.00 RRP: $19.95
Habotest Ht60 Portable Gas Leak Detector Handheld Combustible Gas Detector With Audible And Visual
$17.95 Save $17.00 RRP: $34.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$17.95
Habotest Ht60 Portable Gas Leak Detector Handheld Combustible Gas Detector With Audible And Visual
$13.95 Save $14.00 RRP: $27.95
Rm370 carbon monox detector
$17.95 Save $46.05 RRP: $64.00
25-26 MH-Z19 MH-Z19C IR Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor NDIR Accessories
$16.95 Save $16.00 RRP: $32.95
12V Gas Alarm Sensor Alarm Propane Butane LPG Natural Motor Home Camper 2025
$13.95 Save $14.00 RRP: $27.95
AO-02 Gas Detector Sensor for AO2 AA428-210 AO2PTB-18.10 Replacement
$20.95
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
$14.95