Filters

Under $20 Heat Detectors

Shop the best prices on 36 great value under $20 heat detectors. Shopping for heat detectors is easy with Fruugo, with SALE discounts, offers and savings on Elsavct and Elriven. Buy heat detectors online safely with Fruugo, with secure payment and fast shipping to Singapore.

Filters
1 - 32 of 36
Multifunctional Rechargeable Intelligent Sensor Adjustable Headlamp
$14.95 Save $17.00 RRP: $31.95
Flame Detection Sensor Photosensitive Electric Eye Photoresistor for Burner Applications
$12.95 Save $14.00 RRP: $26.95
Freestanding Heat Detection Alarm ABS High Temperature Detector with Audible Visual Warning for Fire Safety
$19.95 Save $9.00 RRP: $28.95
Tuya Zigbee Water Leak Sensor Wireless Flooding Detector Water Leakage Detection Alert Water Level
$18.95
Camera Detector 25H Working Time Detection Signal Scanner for Home Car Hotel
$16.95 Save $6.00 RRP: $22.95
Digital Lcd Hygrometer Wood Moisture Meter Firewood Electrode Detector 0-99.9%
$19.95
StepUp Module 12V to 36V DC Voltage Converter Power Regulator Booster GYVRM SZS12361.5
$13.95 Save $19.00 RRP: $32.95
26-27 4098-9613 - Fixed Temperature 135F Rate of Rise Heat Detector
$20.95 Save $21.00 RRP: $41.95
WCS1700 3-5V Hall Current Sensor Adjustable DC100A 70A 35A Short over-Current Detector Protection M
$15.95
5 Pcs DC 3-24V 85dB Sound Electronic Buzzer Alarm Black 23 x 12mm
$8.95 Save $5.00 RRP: $13.95
Smart WIFI Water Leak Detector 100dB High-Decibel Alarm Remote Real-Time Control Wireless Stereo Se
$20.95 Save $4.00 RRP: $24.95
Wcs1600 Hall Current Sensor Adjustable Dc100a Short Over-current Detector Protection Module
$10.95
Tuya Zigbee Water Leak Sensor Wireless Flooding Detector Water Leakage Detection Alert Water Level
$14.95 Save $14.00 RRP: $28.95
5 Way Flame Sensor Module Fire Extinguisher Detection Board with Indicator Digital and Analog Output for Safety Systems
$7.95 Save $4.00 RRP: $11.95
Portable Infrared Multi-function Detector 3-speed Digital Anti-candid Camera Scanner
$20.95 Save $38.05 RRP: $59.00
4098-9613 - Fixed Temperature 135F Rate of Rise Heat Detector 2025
$20.95 Save $21.00 RRP: $41.95
DEWIN Water Leak Alarm,Water Overflow Sensor Detector 120dB Water Leakage Alarm System
$19.95 Save $18.00 RRP: $37.95
4098-9613 - Fixed Temperature 135F Rate of Rise Heat Detector 2025
$20.95 Save $21.00 RRP: $41.95
Tuya Zigbee Water Leak Sensor Wireless Flooding Detector Water Leakage Detection Alert Water Level
$19.95 Save $2.00 RRP: $21.95
Sensor Protective Case for Temperature Sensor Alarm with Easy Installation
$19.95 Save $4.00 RRP: $23.95
TICFOX Water Overflow Sensor Detector 120dB Water Leakage Alarm System
$19.95 Save $18.00 RRP: $37.95
Universal Valve Extension Adapter 135 Degrees for Motorcycle and Car, 45-90 Degree Angle, Regulated Tire Valves for Tire Inflation
$20.95 Save $11.00 RRP: $31.95
StepUp Module 12V to 36V DC Voltage Converter Power Regulator Booster GYVRM SZS12361.5
$16.95 Save $16.00 RRP: $32.95
Tuya Zigbee Water Leak Sensor Wireless Flooding Detector Water Leakage Detection Alert Water Level
$17.95 Save $41.05 RRP: $59.00
5 Pcs DC 3-24V 85dB Sound Electronic Buzzer Alarm Black 23 x 12mm
$7.95 Save $38.00 RRP: $45.95
Water Overflow Sensor Detector 120dB Water Leakage Alarm System
$21.95 Save $18.00 RRP: $39.95
Infrared Fire Detection Sensor Module Flame Sensing Relay Module 12VDC 760~1100nm
$7.95 Save $9.00 RRP: $16.95
5 Pcs Dc 3-24v 85db Sound Electronic Buzzer Alarm Black 23 X 12mm Elriven
$9.95 Save $36.00 RRP: $45.95
Vd806 Non-contact Electrical Voltage Detector With Battery Continuity Tester Pen With Sound And Light Alarm Elsavct
$10.95 Save $63.05 RRP: $74.00
Detector Cover Plastic Cover for Baking and Cooking
$17.95 Save $14.00 RRP: $31.95
Electrical Tester, 12-1000v Non-contact Voltage Detector, Phase/neutral Wire Test, Sound & Light Buzzer, Flashlight, Ac 50-500hz, Ncv Voltage Tester P
$16.95 Save $25.00 RRP: $41.95
Fuel Valve Switch 62163 75 Shockproof High Temperatures Resistant Lightweight Replacement for Big Twin 1975?2006
$20.95 Save $12.00 RRP: $32.95