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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
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
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
Automobile Air Conditioning Fluorescent Leak Detectors Syringe
$16.95 Save $8.00 RRP: $24.95
2pcs Mq-9 Mq9 Liquefied Flammable Methane Gas Sensor Module
$4.95 Save $6.00 RRP: $10.95
Co2 Air Detector Carbon Dioxide Detector Agricultural Production Greenhouse Co2 Monitor White
$13.95 Save $20.00 RRP: $33.95
-SGP30 ECO2 Air Quality Gas Sensor Module TVOC Detection Chip Compatible for Demo Board
$20.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv-YKY416
$16.95 Save $9.00 RRP: $25.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$15.95 Save $16.00 RRP: $31.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$16.95 Save $52.05 RRP: $69.00
Semiconductor CO2 Gas Sensor Carbon Dioxide Gas Sensor Air Quality Sensor Module UART Output JW01-C
$13.95 Save $3.00 RRP: $16.95
Ms1100 Gas Sensor Module, High-precision Tvoc And Co2 Detection, Household And Laboratory Gas Quality Sensing
$15.95
MQ-3 Gas Sensor Module for Ethanol and Alcohol Detector E-Commerce Condition New Voltage Regulator Type
$16.95 Save $11.00 RRP: $27.95
ENS160+AHT21 CARBON Dioxide CO2 ECO2 TVOC Air Quality and Temperature and Humidity Sensor Replace CCS811
$19.95 Save $10.00 RRP: $29.95
FY8830 Portable Gas Leak Detector Natural Gas Detector
$18.95 Save $19.00 RRP: $37.95
ENS160+AHT21 CARBON Dioxide CO2 ECO2 TVOC Air Quality and Temperature and Humidity Sensor Replace CCS811
$17.95
3IN1 ECO2 ECH2O TVOC Gas Sensor Module Air Pollution Odor Sensor Y01
$14.95 Save $10.00 RRP: $24.95
Tds Meter Digital Water Tester- for Home, Well (Without Battery)
$11.95 Save $7.00 RRP: $18.95
-sgp30 Eco2 Air Quality Gas Sensor Module Tvoc Detection Chip Compatible For Demo Board
$7.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv-YKY416
$16.95 Save $6.00 RRP: $22.95
CO2 Monitor Detector CO2 Drop Checker for Aquatic Plant Aquarium Fish Tank
$20.95 Save $7.00 RRP: $27.95
MS1100 gas sensor module, high-precision TVOC and CO2 detection
$17.95 Save $17.00 RRP: $34.95
Co2 Air Detector Carbon Dioxide Detector Agricultural Production Greenhouse Co2 Monitor White
$11.95 Save $13.00 RRP: $24.95
MICS-5524 Air Quality Gas Sensor Module CO H2 Methane Ethanol Detection Board High Sensitivity for I2C for Arduino DIY
$19.95 Save $11.00 RRP: $30.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$11.95 Save $62.05 RRP: $74.00
Co2 Air Detector Carbon Dioxide Detector Agricultural Production Greenhouse Co2 Monitor White
$10.95 Save $12.00 RRP: $22.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$15.95 Save $38.05 RRP: $54.00
Semiconductor CO2 Gas Sensor Carbon Dioxide Gas Sensor Air Quality Sensor Module UART Output JW01-C
$14.95 Save $1.00 RRP: $15.95
LD2412 Human Presence Sensor 24GHz Radar Sensor ISM Frequency Sensitive Human Motion Sensor 9M GPIO UART Output 7PIN
$17.95 Save $2.00 RRP: $19.95