Hi DFRobot,Why is this sensor has minimum order 10 unit?Best regards.
JaneYu 2016-07-13 14:15:11 12 Views29 Replies Hi DFRobot,
Why is this sensor has minimum order 10 unit?
Best regards.
Is the output pin of the actual sensor itself, not the interface PCBA, open drain? I would like to power the device from 5V, but have the pull up on the output going to 3.3V. Is there anything unwholesome about this? Thank you.
JaneYu Hello,
If this sensor quickly exits the water, will it change states relatively quickly? We have used other analog water sensors before that have probes, however, residual drips of water connecting the probes gave us erroneous readings.
JaneYu Hello, I am wondering if this is still accurate. The specifications under the description say 5v but the description says it can be used with 3.3v.
JaneYu Hi Tom,
You can, but be careful that it may result in to loss of accuracy of the sensor due to any distortion between the wires.
JaneYu tks for answering. I have intalled the sensor in the water tank of a camper. I have encreased both cables and it appears to work ok. I just need to know when the tank is less than a third full approx. I will seal the cable that goes into the sensor with mastic. Is there any info available on the connectors on the interface.
regards Tom
I have some spare 3-wire optical sensors that I believe are 5V DC (one positive, one negative, one ground) is it possible to use this instead of the provided optical sensor? I like the breakout board, but need a fully submersible/magnetic sensor head.
JaneYu Hello there,
This is a contact type liquid level sensor. It cannot be used in liquids.
JaneYu Hello!
Do I understand that right, that there are 2 possibilities to directly (plug and play) connect this sensor?
1. Connecting the sensor to the "Liquid Level Sensor convert board" and then with the "Gravity Digital 3-Pin Cable x1" to a "Gravity IO Expansion Shield for Arduino V7.1" that I mount on an Arduino Uno.
2. Connecting the sensor to the "Liquid Level Sensor convert board" and then with the "Gravity Digital 3-Pin Cable x1" directly to a "DFRduino UNO".
Is this "Gravity Digital 3-Pin Cable x1" included in this order (not mentioned in the shipping list)?
Many thanks in advance!
JaneYu Hi, it doesn't matter to use the sensor to connect the Arduino Uno, if you have the IO expansion shield, you could more easy to connect the sensor with Arduino Uno. otherwise, you may need three wires to connect it alone. don't worry, we will send you Gravity Digital 3-Pin.
In one answer it was stated that the sensor is not waterproof where the cable comes into the back of the sensor **. Another answer three months later stated that the sensor can be submerged and that the top part (I assume where the cable comes into the back of the sensor) is waterproof. These answers are contradictory.
Can the entire sensor, including where the cable comes into the sensor, be submerged?
JaneYu hi Stan
Are you a stan?
Maybe you can look over about wiki's installation
This sensor is not waterproof, but the probe is waterproof
What is the thread size on the sensor? Is it a metric thread or a PG thread or something else? The wiki shows a through hole dia 14.8mm, but in our case we need to tap a correct sized thread.
JaneYu We feel terribly sorry for the inconvenience.
I only saw your inquiry today.
I have already asked the product manager, I am waiting for his reply.
When liquid comes in to contact with the sensor probe the microcontroller will output HIGH logic. When the liquid is not in contact with the probe the microcontroller will output LOW logic.
JaneYu Hi, is it doesn't need library for the source code?
Because i didn't saw any library in the source code, and is it ok if i use common arduino.
JaneYu Hi, i want to know. What is the light source of this sensor?
JaneYu Hi
The light emitted from the sensor is infrared.
Can this be submersed in salt water? In order to detect high and low levels, the low sensor would be submersed.
JaneYu Hi,
Can we use this sensor for water/Liquid level indicator, can we show in form percentage in display?
Thank you
JaneYu The vapor will affect the reliability of this sensor, because the vapor may affect the receiving of the light, which will make the sensor unreliable.
JaneYu It still depends on how big is the tube, it should be larger than the sensor. The distance between 1mL and 1.5mL is too small, It can't be so accurate.
JaneYu This is a photoelectric sensor, it could work with EC or PH together, but EC and PH can't work together.
JaneYu 
