Filters

Under $20 Gas Detectors

Shop the best prices on 1,119 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 Australia.

Filters
1 - 32 of 1,119
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
Rm370 carbon monox detector - ZCL1978
$18.95 Save $50.05 RRP: $69.00
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
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 $13.00 RRP: $27.95
5 in 1 Air Quality Monitor, USB Rechargeable CO2 Detector
$15.95 Save $58.05 RRP: $74.00
Wireless CO Gas Alarm LED Digital Display High Sensitivity CO Concentration Detector for Household Ordinary Type
$12.95 Save $26.00 RRP: $38.95
Ms1100 Gas Sensor Module, High-precision Tvoc And Co2 Detection, Household And Laboratory Gas Quality Sensing
$12.95
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
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$7.95 Save $13.00 RRP: $20.95
89465-02080 Oxygen Sensor O2 Sensor for
$19.95 Save $10.00 RRP: $29.95
3IN1 ECO2 ECH2O TVOC Gas Sensor Module Air Pollution Odor Sensor Y01
$9.95 Save $5.00 RRP: $14.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$9.95 Save $49.05 RRP: $59.00
Indoor Co2 Sensor Co2 Meter Digital Air Detector Intelligent Air Quality Analyzer
$20.95 Save $48.05 RRP: $69.00
GY-SGP30 ECO2 Air Quality Gas Sensor Module TVOC Detection Chip
$13.95 Save $7.00 RRP: $20.95
5 In 1 Air Quality Monitor Tvoc Hcho Temperature Humidity Co2 Meter, Usb Rechargeable Co2 Detector White
$13.95
Gas Leak Detector Combustible Propane Butane Methane Leak Warning Combustible Gas Alarm Sensor for Home Security EU Plug
$15.95 Save $10.00 RRP: $25.95
Flame Detector QRB1 Electric Eye Burner Fire Detection Photosensitive Tube for Burner
$14.95
ENS160+AHT21 Carbon Dioxide Air Quality Sensoring I2C Compatible CCS811 Replacement Air Quality Monitoring Module
$20.95 Save $27.00 RRP: $47.95
ENS160+AHT21 CARBON Dioxide CO2 ECO2 TVOC Air Quality and Temperature and Humidity Sensor Replace CCS811
$16.95
3x Sma-type 50 Ohm Nanovna Vector Network Analyzer Calibration Kit Load &short &open
$20.95 Save $11.00 RRP: $31.95
Ht61 Natural Leak Detector Combustible Detector Liquefied Leak Alarm
$19.95
Rm370 carbon monox detector
$20.95 Save $19.00 RRP: $39.95
III in 1 CO2 Meter Air Quality Monitor Handheld 5000Ppm Measurement Carbon Dioxide Det
$17.95 Save $66.05 RRP: $84.00
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$7.95 Save $24.00 RRP: $31.95
High Sensitivity Digital Gas Detector, Sensor Gas Leak Detector For Lpg, Lng, Coal, And Natural Gas Leaks, Home Gas Alarm Monitor With Voice
$12.95 Save $19.00 RRP: $31.95
Electrochemical CH2O Formaldehyde Sensor Gas HCHO Sensor Module Smart Home Devices
$16.95 Save $9.00 RRP: $25.95
MH-Z19 MH-Z19C IR Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor NDIR Accessories-yi wu
$19.95 Save $26.00 RRP: $45.95