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Under $20 Gas Detectors

Shop the best prices on 1,210 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 Singapore.

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1 - 32 of 1,210
6 In 1 Air Quality Detector Lcd Large Screen Co2 Meter Pm2.5 Pm10 Hcho Tvoc Co Co2 Co Carbon Dioxide Formaldehyde Monitor
$11.95 Save $6.00 RRP: $17.95
Rm370 carbon monox detector
$14.95 Save $11.00 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
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
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
5 in 1 CO2 Meter 400-5000 PPM Sensor Carbon Dioxide Detector Air Quality Monitor jy
$13.95 Save $11.00 RRP: $24.95
Rm370 carbon monox detector - ZCL1978
$17.95 Save $46.05 RRP: $64.00
Air Compressor Pressure Gauge Y40 Iron Shell Instrument Pressure Measuring Meter
$13.95 Save $15.00 RRP: $28.95
Ms1100 Gas Sensor Module, High-precision Tvoc And Co2 Detection, Household And Laboratory Gas Quality Sensing
$11.95
SGP40 VOC Sensor Module Dual Gas Environment Detection Industrial Wide Temperature Range STEMMA QT/
$17.95 Save $3.00 RRP: $20.95
Gas Sensor Module MQ2 MQ135 MultiGas Detector for CO Methane LPG Hydrogen Smoke Precision
$21.95 Save $10.00 RRP: $31.95
Portable Air Quality Detector Multifunctional Digital Carbon Dioxide Monitor For Home Bedroom Office
$18.95 Save $45.05 RRP: $64.00
Combustible Gas Alarm Sensor Gas Leakage Detector EU Plug Standalone Natural/Liquefied Gas Leak Detector For Home Security
$20.95 Save $7.00 RRP: $27.95
Gas Sensor Module MQ2 MQ135 MultiGas Detector for CO Methane LPG Hydrogen Smoke Precision
$21.95 Save $10.00 RRP: $31.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$6.95 Save $11.00 RRP: $17.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$8.95 Save $42.00 RRP: $50.95
Indoor Co2 Sensor Co2 Meter Digital Air Detector Intelligent Air Quality Analyzer
$18.95 Save $45.05 RRP: $64.00
GY-SGP30 ECO2 Air Quality Gas Sensor Module TVOC Detection Chip
$12.95 Save $6.00 RRP: $18.95
5 In 1 Air Quality Monitor Tvoc Hcho Temperature Humidity Co2 Meter, Usb Rechargeable Co2 Detector White
$11.95
Air Intake Sensor Flow Detection Accessories for PC200‑8 Excavator 4076493/6261‑81‑1900
$19.95 Save $24.00 RRP: $43.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set
$20.95 Save $17.00 RRP: $37.95
Flame Detector QRB1 Electric Eye Burner Fire Detection Photosensitive Tube for Burner
$12.95
ENS160+AHT21 Carbon Dioxide Air Quality Sensoring I2C Compatible CCS811 Replacement Air Quality Monitoring Module
$17.95 Save $25.00 RRP: $42.95
Temperature & Humidity Meter, Air Quality Monitor, CO2 Detector, 3-in-1 Digital Air Pollution Carbon Dioxide Detector B
$19.95 Save $9.00 RRP: $28.95
ENS160+AHT21 CARBON Dioxide CO2 ECO2 TVOC Air Quality and Temperature and Humidity Sensor Replace CCS811
$15.95
3x Sma-type 50 Ohm Nanovna Vector Network Analyzer Calibration Kit Load &short &open
$18.95 Save $9.00 RRP: $27.95
Ht61 Natural Leak Detector Combustible Detector Liquefied Leak Alarm
$18.95
Rm370 carbon monox detector
$17.95 Save $18.00 RRP: $35.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$7.95 Save $21.00 RRP: $28.95
8PCS Test Probe, Stainless Steel Multimeter Test Leads Test Probes Multifunction Tester Cable for Multimeters Electricians Laboratories(Red and Black)
$20.95
Formaldehyde Monitor Carbon Dioxide Detector TVOC Detector White
$19.95 Save $3.00 RRP: $22.95