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Under $20 Gas Detectors

Shop the best prices on 443 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 New Zealand.

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1 - 32 of 443
Ordinary QRB1 Flame Detector Photosensitive Electric Eye Burner Detection Photoresistor Red QRB1 Photocell For Burner Waste Oil
$4.95 Save $24.00 RRP: $28.95
III in 1 CO2 Meter Air Quality Monitor Handheld 5000Ppm Measurement Carbon Dioxide Det
$15.95 Save $43.05 RRP: $59.00
-SGP30 ECO2 Air Quality Gas Sensor Module TVOC Detection Chip
$17.95 Save $2.00 RRP: $19.95
CO2 Air Detector Carbon Dioxide Detector Agricultural Production Greenhouse CO2 Monitor White
$16.95 Save $16.00 RRP: $32.95
6 In 1 Air Quality Detector Lcd Large Screen Co2 Meter Pm2.5 Pm10 Hcho Tvoc Co Co2 Co Carbon Dioxide Formaldehyde Monitor
$16.95 Save $8.00 RRP: $24.95
Lead Paint Test Swabs Kit: 60 Pcs Lead Test Kit Swabs
$16.95 Save $4.00 RRP: $20.95
MH-Z19 MH-Z19C IR Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor NDIR Accessories
$20.95 Save $14.00 RRP: $34.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$14.95 Save $39.05 RRP: $54.00
QRB1 Photoresistor Flame Detector for Industrial Burner Safety
$8.95 Save $5.00 RRP: $13.95
BENGGUO CO2 Bicycle Pump with Insulated Sleeve CO2 Bike Tire Inflator Schrader Presta Valve for Qui
$15.95 Save $4.00 RRP: $19.95
Co2 Air Detector Carbon Dioxide Detector Agricultural Production Greenhouse Co2 Monitor White
$20.95 Save $10.00 RRP: $30.95
3IN1 ECO2 ECH2O TVOC Gas Sensor Module Air Pollution Odor Sensor Y01
$15.95 Save $1.00 RRP: $16.95
Indoor Co2 Sensor Co2 Meter Digital Air Detector Intelligent Air Quality Analyzer
$8.95 Save $12.00 RRP: $20.95
AGS10 TVOC Air Quality Gas Sensor I2C MEMS Replaces AGS02MA For Arduino
$13.95 Save $50.05 RRP: $64.00
Co2 Carbon Dioxide Detector Fast Measurement Meter Compatible Co2, White
$17.95 Save $28.00 RRP: $45.95
Co2 Air Detector Carbon Dioxide Detector Agricultural Production Greenhouse Co2 Monitor White-FCY
$11.95 Save $14.00 RRP: $25.95
Co2 Air Detector Carbon Dioxide Detector Agricultural Production Greenhouse Co2 Monitor White-yuyu-FCY
$14.95 Save $20.00 RRP: $34.95
4pcs Max 25V Voltage Detector 3 Terminal Sensor Module
$17.95 Save $5.00 RRP: $22.95
3pcs Ignition Coil Tester Automotive Induction Signal Detection Card Tool
$20.95 Save $63.05 RRP: $84.00
-SGP30 ECO2 Air Quality Gas Sensor Module TVOC Detection Chip Compatible for Demo Board
$19.95 Save $6.00 RRP: $25.95
MS1100 gas sensor module, high-precision TVOC and CO2 detection
$16.95 Save $1.00 RRP: $17.95
3IN1 ECO2 ECH2O TVOC Gas Sensor Module Y01
$17.95 Save $1.00 RRP: $18.95
Temperature Humidity Meter, Air Quality Monitor, Co2 Detector, 3-in-1 Digital Air Pollution Carbon Dioxide Detector B
$17.95
2pcs Digital Carbon Monoxide (co) Detector Alarm Battery Powered B
$15.95
Indoor Co2 Sensor Co2 Meter Digital Air Detector Intelligent Air Quality Analyzer
$17.95 Save $41.05 RRP: $59.00
CO2 Air Detector Carbon Dioxide Detector Agricultural Production Greenhouse CO2 Monitor
$17.95 Save $18.00 RRP: $35.95
Crack Monitor Chart - Clear Plastic Ruler With Transparency Defect Chart Portable Measuring Tool For Scratch Inspection Crack Monitoring And Diameter
$17.95 Save $71.05 RRP: $89.00
Generator 12V Micro-Type Generator 100mg Professional Production Purification Air Purifier Module
$12.95 Save $3.00 RRP: $15.95
MS1100 Gas Sensor Module, High-Precision TVOC and CO2 Detection, Household and Laboratory Gas Quality Sensing
$18.95 Save $5.00 RRP: $23.95
12V Gas Alarm Sensor Alarm Propane Butane LPG Natural Motor Home Camper
$17.95 Save $16.00 RRP: $33.95
ENS160+AHT21 CARBON Dioxide CO2 ECO2 TVOC Air Quality and Temperature and Humidity Sensor Replace CCS811
$18.95
MS1100 gas sensor module, high-precision TVOC and CO2 detection
$18.95 Save $3.00 RRP: $21.95