DC 5V AT89C2051 DS18B20 microcontroller temperature controller LED Alarm Kits CA

Non-Contact Liquid Level Sensor Water Alarm Induction Switch Detector DC 5-30V

DC 5-30V Non-Contact Liquid Level Sensor Water Alarm Induction Switch Detector

Electronic Temperature Control Sound Light Alarm Suite DC 3~5V DIY Kit CA

MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 Gas Detection Alarm Sensor Module

10 PCS SW-420 Motion Sensor Module Alarm Sensor Module Vibration Switch

Water Detector Water Leakage Water Leak Water level Sensor Water Leakage Alarm

motion sensor Alarm High sensitivity DC 12V PIR Module Relay control security A7