Aqara Water Sensor

Aqara Water Leak Sensor is a small battery-powered detector designed to identify water reaching the two conductive probes on its underside. It can be placed near washing machines, sinks, water heaters, pumps or other areas where an early leak warning is useful.

The exact model is SJCGQ11LM. Aqara documents Zigbee connectivity, a CR2032 battery and a 50 × 50 × 15 mm enclosure. The sensor itself is an indoor device and requires a compatible hub/gateway to report events to an app or trigger other smart-home devices.

The original SJCGQ11LM documentation explicitly describes pairing through the Mijia app and using a Mijia multifunction gateway. That makes this older model Mi Home-compatible when used with a compatible gateway and region. Newer Aqara ecosystem documentation may emphasize Aqara Home instead, so the gateway and server region still matter.

The seller listing also describes the sensor as IP67. That rating concerns the sealed sensor enclosure; installation should still follow Aqara’s indoor-use guidance and avoid assuming the device is intended for permanent submersion.

Place the sensor where water would reach its probes early, while keeping it within reliable Zigbee range of the gateway. The device can participate in automations only after successful gateway pairing, so test communication at the intended location before relying on alerts. Pack-size options in the marketplace listing simply change how many identical sensors are supplied; they do not change the sensor model or its technical characteristics.