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Under $20 Gas Detectors

Shop the best prices on 639 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 639
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 $20.00 RRP: $42.95
VOC Gas Sensor Module AGS01DB Air Quality Sensor Module for HVAC Refrigeration
$20.95 Save $21.00 RRP: $41.95
Lcd Carbon Monoxide Co Detector Poisoning Gas Sensor Monitor Warning Alarm Set
$17.95
Mini Handheld Gas Leak Detector Natural Gas Detector Combustible Gas Detector with Audible Alarm Gas Sniffer Test White
$18.95 Save $13.00 RRP: $31.95
Semiconductor CO2 Gas Sensor Carbon Dioxide Gas Sensor Air Quality Sensor Module UART Output JW01-CO2
$9.95 Save $11.00 RRP: $20.95
3IN1 ECO2 ECH2O TVOC Gas Sensor Module Air Pollution Odor Sensor Y01
$9.95 Save $12.00 RRP: $21.95
Practical Propane Butane LPG Fuel Gas for Tank Level Indicator Magnetic Gauge Bo unbrand
$19.95
CO2 Drop-Checker Glass Carbon Dioxide Monitor CO2 Indicator for Planted Aquarium Fish for Tank CO2 Detector Mini Size
$19.95
89465-02080 Oxygen Sensor O2 Sensor for
$14.95 Save $7.00 RRP: $21.95
MS1100 Gas Sensor Module, High-Precision TVOC and CO2 Detection, Household and Laboratory Gas Quality Sensing
$14.95 Save $4.00 RRP: $18.95
Magnetic Detector Meter Field Strength Test Instruments Monopoly Alarm Sound
$17.95
AGS10 TVOC Air Quality Gas Sensor I2C MEMS Replaces AGS02MA For Arduino
$11.95 Save $42.05 RRP: $54.00
AD8361 RF Microwave Real Power Detector, AM Detector, Amplitude Detection
$20.95 Save $6.00 RRP: $26.95
Enhanced Version Super Sensitive Listen Sound Amplifier with 180MAh Battery Used for Wooden Walls, D
$20.95 Save $7.00 RRP: $27.95
Gas Leak Detector Combustible Propane Methane Leak Warning EU Plug Combustible Gas Alarm Sensor for
$18.95
2pcs Digital Carbon Monoxide (co) Detector Alarm Battery Powered B
$12.95
-SGP30 ECO2 Air Quality Gas Sensor Module TVOC Detection Chip Compatible for Demo Board
$17.95 Save $34.00 RRP: $51.95
High Precision Flaw Detection Gauge Line Width Defect Measure Line Width Defect Tool Line Defect Measuring Ruler For Line Width Defects And Measuring
$9.95 Save $54.05 RRP: $64.00
Gas Sensor Module 5V Accurate Air Quality Formaldehyde Benzene
$20.95 Save $12.00 RRP: $32.95
Digital Display Thermometer Black ABS Accurate Anti Impact Electronic Water Temperature Meter
$18.95 Save $21.00 RRP: $39.95
Generator 12V Micro-Type Generator 100mg Professional Production Purification Air Purifier Module
$9.95 Save $2.00 RRP: $11.95
Formaldehyde Detector for Household Professional Self-Test Indoor Air Quality Testing Formaldehyde
$16.95 Save $42.05 RRP: $59.00
Temperature & Humidity Meter, Air Quality Monitor, CO2 Detector, 3-In-1 Digital Air Pollution Carbon Dioxide Detector A
$21.95
SGP41 VOC Sensor Module Dual Gas Environment Detection Industrial Wide Temperature Range STEMMA QT/Qwiic Interface
$20.95 Save $5.00 RRP: $25.95
ENS160+AHT21 CARBON Dioxide CO2 ECO2 TVOC Air Quality and Temperature and Humidity Sensor Replace CCS811
$14.95
Auto Car Circuit Tester Sensor Signal Resistance Simulator Fuel Diagnostic Tool Analog Generator Res
$17.95
600V-7KV Fence Tester Home Garden Horse Livestock Electric Fence Voltmeter No Need Battery with 8 In
$15.95
MT05 Indoor Air Quality Monitor Black
$20.95 Save $4.00 RRP: $24.95
Portable Breathalyzer with Display Rechargeable Digital Breathalyzer for Driving Prevention
$20.95 Save $4.00 RRP: $24.95
Gas Leak Detector Portable Nature Gas Detectors Methane Hexane Propane Sniffer for Home/Outdoor White Contains Battery
$20.95 Save $11.00 RRP: $31.95
Enhanced Version Super Sensitive Listen Sound Amplifier with 180MAh Battery Used for Wooden Walls, D
$19.95 Save $8.00 RRP: $27.95