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Under $20 Gas Detectors

Shop the best prices on 983 great value under $20 gas detectors. Shopping for gas detectors is easy with Fruugo, with SALE discounts, offers and savings on Shanghai Yangxin and Stormsure. Buy gas detectors online safely with Fruugo, with secure payment and fast shipping to Australia.

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1 - 32 of 983
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
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 $19.00 RRP: $38.95
5 in 1 CO2 Meter 400-5000 PPM Sensor Carbon Dioxide Detector Air Quality Monitor jy
$14.95 Save $13.00 RRP: $27.95
Air Quality Sensor Module for VOC, Formaldehyde, and ene Detection, Level 4 Monitoring Probe
$21.95 Save $12.00 RRP: $33.95
Gas Leak Detector Natural Gas Detectors Combustible Gas Detector
$14.95 Save $9.00 RRP: $23.95
MICS-6814 Gas Sensor Carbon Monoxide CO NO2 NH3 Nitrogen Oxygen Air Quality Detection Numerical Sen
$20.95 Save $10.00 RRP: $30.95
High Precision Flaw Detection Gauge Line Width Defect Measure Line Width Defect Tool Line Defect Measuring Ruler For Line Width Defects And Measuring
$11.95 Save $67.05 RRP: $79.00
12V Gas Alarm Sensor LPG Propane Butane Leak Detector Waterproof LED Flash Sound Warning for RV Camping Marine Safety
$18.95 Save $9.00 RRP: $27.95
MQ-7 Gas Sensor, Carbon Monoxide CO Gas Alarm Sensor Detection Module
$13.95 Save $7.00 RRP: $20.95
Magnetic Detector Meter Field Strength Test Instruments Monopoly Alarm Sound
$17.95
Air Quality Monitor 5 in 1 Air Quality Detector C02 Detector HCHO TVOC Tester LCD Temperature Humid
$19.95 Save $2.00 RRP: $21.95
Formaldehyde Monitor Carbon Dioxide Detector TVOC Detector Temperature and Humidity CO 2 Air Qualit
$19.95 Save $49.05 RRP: $69.00
suitable for QRB1 Flame Detector Photosensitive Electric Eye Burner Detection-jc
$14.95 Save $7.00 RRP: $21.95
SGP41 VOC Sensor Module Dual Gas Environment Detection Industrial Wide Temperature Range STEMMA QT/Qwiic Interface
$18.95
Water Detector, 120dB Safety Water Loop Security Water Level Alarm Sensor for Kitchen
$6.95 Save $13.00 RRP: $19.95
Rm370 carbon monox detector - ZCL1978,__a
$20.95 Save $20.00 RRP: $40.95
Tds Meter Digital Water Tester- for Home, Well (Without Battery)
$2.95 Save $5.00 RRP: $7.95
Mini Handheld Gas Leak Detector Natural Gas Detector Combustible Gas Detector with Audible Alarm Gas Sniffer Test White
$20.95 Save $10.00 RRP: $30.95
Gas Leak Detector Combustible Propane Butane Methane Leak Warning Combustible Gas Alarm Sensor for Home Security EU Plug
$16.95 Save $5.00 RRP: $21.95
MS1100 Gas Sensor Module, High-Precision TVOC and CO2 Detection, Household and Laboratory Gas Quality Sensing
$16.95 Save $4.00 RRP: $20.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set Shytmv
$18.95
Four- Humidifier Module Humidifier Control Board Atomizer Driver Board Four- Humidifier Module,Set D
$9.95 Save $7.00 RRP: $16.95
Rm370 carbon monox detector
$18.95 Save $50.05 RRP: $69.00
Fast Response Industrial Safety Sensory Probe Detection Gas Leak Detector for MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-9 Multicolor
$16.95
5 in 1 Air Quality Monitor, USB Rechargeable CO2 Detector Black
$20.95
Durable Propane Butane LPG Fuel Gas for Tank Level Indicator Magnetic Gauge Bott unbrand
$19.95
-z19 -z19c Ir Infrared Co2 Sensor Module Carbon Dioxide Gas Sensor Ndir Accessories
$17.95
3IN1 ECO2 ECH2O TVOC Gas Sensor Module Air Pollution Odor Sensor Y01
$10.95 Save $4.00 RRP: $14.95
2pcs Mq-8 Mq8 Hydrogen Gas Sensor H2 Detection Sensor Module For Arduino 25-26
$15.95 Save $15.00 RRP: $30.95