Description: The SST Liquid Level Sensor provides single point liquid detection via a TTL compatible push/pull output. This optical liquid level sensor features a miniature design that allows for installation in areas where space is limited. Thanks to its minimal solid state design, this sensor has been built without moving or mechanical parts that can be jammed and stop working.
An infra-red LED and phototransistor accurately positioned at the base of the sensing tip ensure good optical coupling between the two when the sensor is in air. When the sensing tip is immersed in liquid, the infra-red light escapes from the cone, causing a change in the amount of light present at the phototransistor, which makes the output change state.
Based on 3 ratings:
1 of 1 found this helpful:
Great experience using 50 (fifty) of these sensors for an electronics/computer education program. Water level sensing was a critical component of the program, and I tried several different technologies, including eTape and float sensors. I found no other sensors to be reliable. These sensors are compact, rugged, have no moving parts, and provide a simple interface. All 50 did exactly what they were supposed to do.
with just a drop of water on the end of it, it changes states. cost is to high as well.
The Sensors form, small simple installation make it practical for limited space application, the issues was consistency. The singles it sends back jumps all over the place. It is supposed to be a simple high low switch but the data sheet says PWM, so I tried measuring pulse too but found the device gives faulty readings. I thought it was maybe a defective sensor so I tried a second one I had and same thing. Ended up having to use another method to detect coolant levels. Would not recommend using in any project that needs consistent results.
The issue may be occurring when liquid splashed up onto the sensor. I’d recommend contacting our tech support team. They should be able to figure out the best course of action.