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Under $20 Heat Detectors

Shop the best prices on 15 great value under $20 heat detectors. Shopping for heat detectors is easy with Fruugo, with SALE discounts, offers and savings on Elriven and Elsavct. Buy heat detectors online safely with Fruugo, with secure payment and fast shipping to New Zealand.

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1 - 15 of 15
Wcs1600 Hall Current Sensor Adjustable Dc100a Short Over-current Detector Protection Module
$15.95
Tuya Zigbee Water Leak Sensor Wireless Flooding Detector Water Leakage Detection Alert Water Level
$20.95 Save $20.00 RRP: $40.95
5 Pcs DC 3-24V 85dB Sound Electronic Buzzer Alarm Black 23 x 12mm
$10.95 Save $7.00 RRP: $17.95
4098-9613 - Fixed Temperature 135F Rate of Rise Heat Detector
$0.95
5 Way Flame Sensor Module Fire Extinguisher Detection Board with Indicator Digital and Analog Output for Safety Systems
$10.95 Save $5.00 RRP: $15.95
5 Pcs DC 3-24V 85dB Sound Electronic Buzzer Alarm Black 23 x 12mm
$11.95
5 Pcs Dc 3-24v 85db Sound Electronic Buzzer Alarm Black 23 X 12mm Elriven
$13.95 Save $55.05 RRP: $69.00
Infrared Fire Detection Sensor Module Flame Sensing Relay Module 12VDC 760~1100nm
$10.95 Save $13.00 RRP: $23.95
Vd806 Non-contact Electrical Voltage Detector With Battery Continuity Tester Pen With Sound And Light Alarm Elsavct
$14.95 Save $89.05 RRP: $104.00
5 Pcs DC 3-24V 85dB Sound Electronic Buzzer Alarm Black 23 x 12mm
$10.95 Save $58.05 RRP: $69.00
5 Pcs Dc 3-24v 85db Sound Electronic Buzzer Alarm Black 23 X 12mm
$18.95 Save $9.00 RRP: $27.95
Multifunctional Rechargeable Intelligent Sensor Adjustable Headlamp
$20.95 Save $24.00 RRP: $44.95
5 Pcs DC 3-24V 85dB Sound Electronic Buzzer Alarm Black 23 x 12mm
$11.95 Save $8.00 RRP: $19.95
Flame Detection Sensor Photosensitive Electric Eye Photoresistor for Burner Applications
$17.95 Save $20.00 RRP: $37.95
StepUp Module 12V to 36V DC Voltage Converter Power Regulator Booster GYVRM SZS12361.5
$19.95 Save $27.00 RRP: $46.95