Filters

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.

Filters
1 - 32 of 1,130
Air Quality Monitor 5 in 1 Air Quality Detector C02 Detector White
$18.95 Save $5.00 RRP: $23.95
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 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
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
VOC Gas Sensor Module AGS01DB Air Quality Sensor Module for HVAC Refrigeration
$20.95 Save $21.00 RRP: $41.95
MICS-5524 Air Quality Gas Sensor Module CO H2 Methane Ethanol Detection Board High Sensitivity for I2C for Arduino DIY
$16.95 Save $7.00 RRP: $23.95
12V Gas Alarm Sensor Alarm Propane Butane LPG Natural Motor Home Camper 2025
$14.95 Save $15.00 RRP: $29.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$11.95 Save $31.00 RRP: $42.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set
$17.95
Gas Leak Detector Portable Natural Gas Detector Alarm Sound Methane Hexane With Lcd Screen 2 Aaa Ba
$18.95
Carbon Dioxide Detector Co2 Air Detector Concentration Detection Monitor-MXBC
$18.95 Save $14.00 RRP: $32.95
MQ137 Ammonia Gas Detection Sensor Module NH3 Gas Sensor Module
$16.95
CO2 Sensor 400-10000 ppm Carbon Dioxide Air Quality Detection
$19.95
Practical Propane Butane LPG Fuel Gas for Tank Level Indicator Magnetic Gauge Bo unbrand
$19.95
Co2 Air Detector Carbon Dioxide Detector Agricultural Production Greenhouse Co2 Monitor White
$16.95 Save $8.00 RRP: $24.95
3IN1 ECO2 ECH2O TVOC Gas Sensor Module Air Pollution Odor Sensor Y01
$11.95 Save $1.00 RRP: $12.95
CO2 Drop-Checker Glass Carbon Dioxide Monitor CO2 Indicator for Planted Aquarium Fish for Tank CO2 Detector Mini Size
$19.95
SGP40 VOC Sensor Module Dual Gas Environment Detection Industrial Wide Temperature Range STEMMA QT/Qwiic Interface
$19.95 Save $11.00 RRP: $30.95
89465-02080 Oxygen Sensor O2 Sensor for
$14.95 Save $7.00 RRP: $21.95
Indoor Co2 Sensor Co2 Meter Digital Air Detector Intelligent Air Quality Analyzer
$6.95 Save $9.00 RRP: $15.95
AGS10 TVOC Air Quality Gas Sensor I2C MEMS Replaces AGS02MA For Arduino
$11.95 Save $42.05 RRP: $54.00
Co2 Carbon Dioxide Detector Fast Measurement Meter Compatible Co2, White
$14.95 Save $23.00 RRP: $37.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set
$19.95 Save $22.00 RRP: $41.95
AD8361 RF Microwave Real Power Detector, AM Detector, Amplitude Detection
$20.95 Save $6.00 RRP: $26.95
2026 Suitable New portable gas leak detector,hand-held natural gas detector,high sensitivity,with LCD display
$13.95 Save $19.00 RRP: $32.95
MQ137 Ammonia Gas Detection Sensor Module NH3 Gas Sensor Module Household Appliance Accessories Analog TTL Level Output
$19.95 Save $11.00 RRP: $30.95