I'm designing a wavemeter. One that measures wave height in a lagoon along with water depth. (What were you thinking, audio wave, radio wave? :slight_smile: ) This is verson 3 or 4, I lost track. This attempt will use a pressure sensor located near the bottom to measure the pressure of the water co…

Suggestion: post the required details, as described in the "How to get the best out of this forum" post. A wiring diagram and a picture of the setup would help to spot missing ground connections, for example.

[image] wingsy: Why does the sensor care about me holding the end of the 5' tube? Perhaps it is mains induced RFI (Radio Frequency Interference) picked up by your body and traveling into the circuitry.

[image] wingsy: I held the pressure hose in my hand and noticed a sharp rise in pressure [image] wingsy: When I let go the pressure drops Maybe the pressure your hand exerts on the hose is more than water? [image] wingsy: make it do what I want Maybe the meter will make you do …

not attempted to use a pressure sensor measuring water height on a tidal river in a river monitoring system I used The Things UNO with a BMP280 temperature/pressure sensor, a SR04M ultrasonic transducer and a DS18B20 DallasTemperature sensor uploading data over LoRaWAN to the myDevices/cayenne desk…

Yes, I saw your work a while back when I was attacking my problem with sonar. I almost got that to work. It's one thing to use ultrasonics to detect the surface of the water to compute water depth, but something else to catch the crests and troughs of 2-foot waves. The water surface is so irregular …

This morning I got a clue. Holding the tube in my hand did absolutely nothing. So, what's changed? What's changed is there is no water droplet clinging to the end of the tube. A water droplet at the open end of my narrow tube effectively seals off the tube so the heat of my hand causes the air press…

You need a low volume air pump to make up for air leaking out of the tubing, a "bubbler". Run the pump a couple of seconds every 30 minutes or so to keep water purged from tubing.

Bubblers are a common form of air-pressure type water level gauges. The pressure in the system is limited by the height of the water column, and the fouling is limited since you are pushing clean air into the system. [image] Benefits of Using a Bubbler to Measure Water Level Simply p…

I wonder how well a bubbler would capture the peaks and troughs of short period waves.

WaveMeter... Not That Kind

Projects General Guidance

xfpd January 7, 2025, 9:40pm 11

Why read the height of every wavelet and trough? That's like staring at a compass while navigating a forest. Take a general bearing.

Use a long, subsurface, float to average level changes.

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WaveMeter... Not That Kind

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