AQS00660, AQS00661, LD1-24

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AQS00660, AQS00661, LD1-24

Water Sensor / Switch AQS00660, AQS00661, LD1-24

Water Sensor / Switch


The Model LD1-24 and the AQS models are small electronic control relays for detecting a rising water level in HVAC and Building Automation System, BAS, applications. Inside a waterproof enclosure, the water level detector features a medium-power relay, which is operated by water reaching the trip level, and can be used to control alarms or other equipment. The relay is normally energized when the power supply is switched on and no water is present. When water rises up the side of the box to reach the switching level, the relay drops out. This sequence is failsafe, allowing each model to be used as a water spillage alarm switch or to turn off a valve or an air conditioning unit before the water overflows its containment.


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QtyModelDescriptionIn StockList PriceInternet Price
AQS00660 90-254 VAC WATER SENSOR/SWITCH - 10FT LEADS In Stock161.19128.95
AQS00661 24VAC/DC WATER SENSOR/SWITCH - 5FT LEADS In Stock152.78122.22
LD1-24 WATER DETECTING BLOCK 24AC In Stock163.96131.17


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  • All components safely encapsulated against moisture ingress
  • Switching capability 5A at 240 VAC

Supply Voltage:

AQS00660:95-254V 50/60 Hz, 2W

AQS00661:24 VAC/VDC 50/60 Hz

LD1-24:24 VAC, 50/60 Hz

Relay Output Rating:240 VAC 50/60 Hz, 5A; 24 VDC, 2.5A

Switch Off Level:

AQS00660/1:0.32" (0.8 cm) nominal

LD1-24:0.43" (1.1 cm) nominal

Switch On Level:

AQS00660/1:0.40" (1 cm) nominal

LD1-24:0.31" (0.8 cm) nominal

Operating Temperature:32° to 158℉ (0° to 70℃)

Cable Length:

AQS00660/1:5 ft (1.5m)

LD1-24:18" (0.46m)


AQS00660:1.2"H x 2.0"W x 1.25"L (3.0 x 5.0 x 3.1 cm)

AQS00661:1.2"H x 2.0"W x 1.25"L (3.0 x 5.0 x 3.1 cm)

LD1-24: 0.9"H x 2.0"W x 1.25"L (2.2 x 5.0 x 3.1 cm)


Warranty:1 year


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