ThailandAirGradient builds open-source indoor and outdoor air quality monitors that track PM2.5, CO2, temperature, humidity and other pollutants. The company is known for its open hardware and firmware, letting users build, repair and integrate the monitors with platforms like Home Assistant and its own dashboard. AirGradient appeals to people who want transparent, data-driven air quality monitoring rather than a closed black box.
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ChinaHeiman is a Chinese manufacturer of smart safety and security sensors, including smoke alarms, gas detectors, water leak sensors and door/window contacts. The company produces Zigbee and Z-Wave devices used across many smart home hubs and is a common original equipment supplier for other brands. Heiman focuses on affordable, safety-oriented sensors for home automation.
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Door & Window SensorsHeimanWindow Door Alarm
$19.98
Motion SensorsHeimanSmart Motion Sensor
$23.99
Motion SensorsHeimanWiFi Smart Motion Sensor
$12.98
SirensHeimanSmart Siren HS2WD series
$79.99
Smoke & CO DetectorsHeimanHS1SA Series Smoke Alarm
5% OFF£16.99£16.14
Smoke & CO DetectorsHeimanSmart CO Alarm
17% OFF$59.99$49.99
Vibration SensorsHeimanSmart Vibration Sensor HS1VS series
$14.90
Water Leak SensorsHeimanSmart Water Leakage Sensor
15% OFF$19.99$16.99