SXL-RX Liquid Level Control Kit with Relay
SXL-RX liquid level control system: a pair of SXL optical sensors with a 120 V outlet relay, power supply and wiring kit, for automatic fill or drain of tanks up to 12 A.
Fill or Drain Control System
An automatic liquid level control system with a pair of SXL optical sensors, a 120 V RX outlet relay, a power supply and a wiring kit.
Install the high and low set point sensors and connect the power supply and relay as the manual shows. The relay and sensors run on low-voltage 24 VDC and switch up to 12 A at 120 VAC, enough for pumps or valves. Intelligent sensor functions include stable-state switching to detect splashing, a two-second output debounce and error indication.
Fill Kit
The low-level sensor turns on the pump, valve or relay, which runs until the high-level sensor activates.
Drain Kit
The high-level sensor turns on the pump, valve or relay, which runs until the low-level sensor activates.
RX Outlet Relay
The relay outlet runs from the sensors' 24 VDC power supply and switches up to 12 A at 120 VAC. You provide the low-voltage two-wire cable between the sensors and the relay outlet.
Mounting
The sensors suit most tank walls.
- Install with 1/4 in NPT threads.
- Use the included o-ring and nut in curved or thin flat-walled tanks.
- Or mount from the top of the tank at adjustable positions with the LSM kit.
How Optical Sensors Work
When the sensor tip is dry, infrared light from an emitter reflects inside the tip back to a receiver. When the tip is wet, most of the light escapes into the liquid and the reflection drops. A microcontroller drives the emitter, watches the receiver and switches the output according to the model.
LSM Mounting System
Mount level sensors on the end of any 1 in PVC pipe for top-down installation through the top of a tank: no holes in the tank side, adjustable depth, and easy removal for cleaning. The flange kit has all stainless steel hardware; wing nuts give quick access to the sensor and a set screw in the flange sets the depth.
View LSM mounting system ›See It Work:
How the SXL optical liquid sensor detects liquid at its tip.
Manuals and Data Sheets
Need Help Choosing Sensors?
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