SXL Optical Liquid Level, Flow & Leak Sensor
SXL optical liquid sensor: no moving parts, detects liquid level in tanks, flow in pipes and leaks in drip pans; 5-24 VDC, 1 A output, made in USA.
Optical Liquid Detection Sensor
SXL electronic optical liquid sensors are durable, have no moving parts and are easy to maintain.
They detect fluid levels in tanks, flow in pipes or leaks in drip pans when liquid touches the sensor tip. A wide voltage range and high current capacity suit TTL logic, industrial PLCs or direct relay control. 1/4 in NPT threads and a removable terminal block, with the pin-out cast into the hex head, make installation and replacement fast.
Intelligent Features
When the output is energized, a red LED lights the sensor body for a visual status indication.
- Stable-state switching to detect splashing.
- Two-second output debounce.
- Error indication for infrared flooding (sensor disabled): the LED flashes.
- Error indication for a backwards terminal block: the LED flashes.
- Heartbeat flash every 10 seconds shows the sensor is powered and working.
Output Options
Available in WET-ON and DRY-ON configurations, or with a PWM output for advanced or embedded applications that need error indication and failure monitoring. The latching option keeps the output on once activated until the sensor's power is cycled.
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.
Standard Installation
Includes an NPT nut and o-ring seal for through-wall and bracket mounting (bracket not included). Mount the sensor in tank walls for level detection and control, tapped into pipe walls for flow detection, in tray bottoms and brackets for leak detection, or on the end of a pipe with the cap kit for level detection.
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?
Tell us about your tanks, pipes or drip pans and we will recommend the sensors and mounting.
