Aqara SJCGQ11LM

Compatibility

Compatible with EpiSensor Edge over Zigbee.

Pair it with the Zigbee radio on an EpiSensor Gateway. Edge reads it locally on the Gateway.

Edge reads 7 values from it, listed under Interface.

Connect it with

• Gateway ZGW-20 From €899 ex VAT Configure
• Evaluation Gateway on a Raspberry Pi Edge and a USB Zigbee radio, one device licensed Free Set up

Specifications

It can be used two ways. Placed flat on the floor, the probes sense water directly. Or the probes can be loosened with a hex screwdriver and wired to a cable, which lets the sensor sit above the floor while the cable reaches the point to watch, such as a drip tray or the base of a tank.³

Power

Battery. One CR2032 coin cell, rated for over two years under normal use.²

Trigger level

0.5 mm of water across the probes²

Ingress protection

IP67²

Wireless

Zigbee, 2400 to 2483.5 MHz³

Maximum transmit power

9.99 dBm³

Operating temperature

-10 to 55 °C¹

Operating humidity

0 to 100 % RH¹

Dimensions

50 × 50 × 15 mm¹

Probe options

On the floor, or wired to a cable from the probe terminals³

Environment

Indoor use only³

FCC ID

2AKIT-SJCGQ11LM³

Where it is used

• Plant rooms and risers, next to water meters, pumps and tanks, so a consumption anomaly can be checked against a sensor at the likely leak point.

  Water consumption monitoring for commercial buildings

• Data rooms under cooling units and chilled-water pipework, where a leak reaches equipment before anyone sees it.

  Server room and rack temperature monitoring

• Under water heaters and calorifiers, with the probes wired to a cable that runs into the drip tray.

  Legionella temperature monitoring

Interface

Readings and settings, with units and ranges where Aqara publishes them.⁴

The sensor sleeps between events, so its readings cannot be requested on demand. A leak is reported when it happens; battery, voltage and the counters arrive with its periodic reports.⁴

The antenna sits directly above the water-drop icon on the top. Keep that side clear of metal, which weakens the signal.³

Setup

1. Open pairing in Edge

   In Edge, open pairing on the Gateway’s Zigbee network, with the sensor close to the Gateway so it joins it directly.

2. Put it into pairing mode

   Press firmly on the water-drop icon on top, which is the reset button, and hold it for about 5 seconds until the blue light under the drop blinks.⁴

3. If it will not join

   Hold the button for 5 seconds until it flashes, wait a second, then press it twice briefly. As a last resort, take the cell out and hold the button while you put it back until pairing completes.⁴

4. Confirm the join

   Check that Edge identifies it as Aqara SJCGQ11LM. Battery level may take up to 24 hours to appear.⁴

5. Close the battery cover

   Turn the battery cover until its groove lines up with the metal probes on both sides. The IP67 rating depends on it.³

6. Check one reading

   Place it where you want to watch, then bridge the two probes with a wet cloth and confirm the leak state in Edge. Dry the probes afterwards.

Common questions

Does the SJCGQ11LM need an Aqara hub to work with Edge?

No. Aqara needs its own hub for the Aqara Home app and Apple Home, but the sensor is a Zigbee device and joins the Zigbee radio on an EpiSensor Gateway, where Edge reads it locally.^3, 4

How long does the battery last?

Aqara rates the CR2032 cell for over two years under normal use. Edge reports battery level, battery voltage and a low-battery flag.^2, 4

Can it detect water away from the sensor itself?

Yes. The probes can be loosened with a hex screwdriver and connected to a cable, so the cable reaches the point to watch while the sensor sits higher up.³

How do I move it from another Zigbee network?

Switch the old network off before pairing it to the Gateway, so the sensor does not rejoin the network it knew.⁴