Great wisdom, Grayfurnaceman! Yes, using oils increases the manometer sensitivity and readability since most oils are less dense than water and have less surface tension. Remember to correct your reading of "inches of oil" to "inches of water" by multiplying the oil inches by oil density, then dividing by water density. Inclining the manometer also makes it more sensitive, as you saw. For a 30 degree inclination from the ground, divide the inches reading by 2.
@@grayfurnaceman How is that so? I have red gauge oil for my Dwyer manometer and it says "specific gravity" (density, correct?) .826. According to www.engineeringtoolbox.com/water-temperature-specific-gravity-d_1179.html water has a specific gravity of roughly .999
Awesome dude. Exactly what I was looking for - simple and easy. I need to measure the pressure for a propane furnace I installed in my garage and did not want to spend money on a tool I will probably never use again. I'm 63 and never needed one so far!! I even have all the hardware needed too. Thanks a lot.
Another great teaching video, that I needed to see and learn from. I'm ordering a gas valve for my propane furnace and on a tight budget. This handy DIY tool is going to save me much needed $$. I love this channel! Thanks GFM, you are a RUclips treasure and wealth of great information! Happy New Year to you sir!
one of the many things I've never though about making and there's many times it would have been great in a pinch when the actual tools are many miles/days away. I nearly always have the needed materials laying around as scrap. I can just imagine the odd looks, whipping one together and using it at someones house :))
I’ve been really enjoying your videos and exploring some of the older ones. As a new first time home owner these have been very educational for me and have helped me to understand my homes systems. I was wondering, though, if you could do a video if you haven’t already on ceiling heat, like the electric radiators in the ceiling that can be adjusted for each individual room. I have seen your videos on ceiling diffusers, and I was wondering if they would be similar or if there are peculiarities with radiant ceiling heaters. We had them in a previous rental and we did not like them, and we believe that they were a significant source of high electric bills.
Nice video, told a ceiling guy to use a water level when his lazer broke on a job and he had no idea what I was talking about. Old school always works. Thanks for the video's.
I've been studying the slide rule, but it's easy to see why they discontinued producing them after electronic calculators came in. That said, a scientific calculator is not exactly easy to use either. Both take significant training or understanding.
It is NOT advisable to use red gauge oil unless it has a specific gravity of 1.0 or you create your own scale (a ruler won't work) Oil is less dense and will indicate higher pressure than water column pressure.
The content of this video and its presentation both are really helpful to build a manometer. Would this be useful to measure static and dynamic air pressure of the air outlet side in a household vacuum cleaner?
I have looked at your list and I can't find the video where you show this homemade manometer in operation. You indicated a future video would be forthcoming. Did I miss it?
Is the end of the tube were the fluid rises open to the atmosphere? Do you put plugs in to transport it? Also, can't you use the fluid in the two tubes to level it?
I have my testo 510 plus my regin specific gravity plus a few backup. O yeah plus the manometer on my Testo Analyser. Still kudos to your tutorials. Respect from the uk. We use Millibars in the uk why do you across the continent use inches? Does any country measure in pascals?
Nice video as always! Just curious- Would using oil instead of water affect the accuracy of the tester since oil is less dense than water? I presume that it would chance the reading a tiny bit, but not enough to matter. Thanks!
It has to have a specific gravity. Somehere in the region of 1.0 SG. For standard tube. Manometers which are shorter in lengh have smaller tubes. So the specfic gravity of the fluid tubes tends to be higher. So the fluid can flow easier. You shouldn't add any colouring agents to your manometer as it makes the SG more dense. 😊
Unrelated to this video i have a question. First of all your videos helped me fix my furnace and i thank you. My furnace fan kicks on and off the whole time the furnace is running and then over and over again after the furnace shuts off. Is there something wrong?
The fan should run continuously during the on cycle. You probably have a heat operated fan switch and it is cycling the fan. The on and off temp settings may need to be reset farther apart. GFM
The liquid inside the tube is your spirit level. Water will ALWAYS find its level. If you hang the device it will act as a plumb bob. Standing water will ALWAYS be 90° to a plumbline
@@grayfurnaceman I have a question is it gas valve if I am getting zero pressure on the outlet side of the valve and 4" wc on the inlet side? I call feel the valve clicking and the igniter sparking and visibly see it but no gas at the burners. I replaced the control module because no spark and once I took it off one of the traces was visible burnt and broken. When I make the call for the furnace to turn on at the mechanical thermostat I see it go through the sequence to light just not getting no gas on the outlet side of the gas valve. The gas valve is White-Rodgers 36h32-406. I have another gas valve on the way which is newer version of that one. Same specs. I just wonder if I'm missing something.
@@grayfurnaceman I just checked it is at 6 1/2. The other furnace is working properly. The spec says 1/2 psi Reg 3.5 wc. I am hoping this is the problem because I already ordered it. I was just hoping I was not missing something.
Хобби
Great wisdom, Grayfurnaceman!
Yes, using oils increases the manometer sensitivity and readability since most oils are less dense than water and have less surface tension. Remember to correct your reading of "inches of oil" to "inches of water" by multiplying the oil inches by oil density, then dividing by water density.
Inclining the manometer also makes it more sensitive, as you saw. For a 30 degree inclination from the ground, divide the inches reading by 2.
The red gauge oil I referenced has the same density as water so it does not require adjustments.
GFM
@@grayfurnaceman How is that so? I have red gauge oil for my Dwyer manometer and it says "specific gravity" (density, correct?) .826. According to www.engineeringtoolbox.com/water-temperature-specific-gravity-d_1179.html water has a specific gravity of roughly .999
A U Tube on RUclips. Brilliant. Nice setup. I still have my incline nanometer.
Awesome dude. Exactly what I was looking for - simple and easy. I need to measure the pressure for a propane furnace I installed in my garage and did not want to spend money on a tool I will probably never use again. I'm 63 and never needed one so far!! I even have all the hardware needed too. Thanks a lot.
Welcome
GFM
Another great teaching video, that I needed to see and learn from. I'm ordering a gas valve for my propane furnace and on a tight budget. This handy DIY tool is going to save me much needed $$. I love this channel! Thanks GFM, you are a RUclips treasure and wealth of great information! Happy New Year to you sir!
Nice theory of operation and a fun project.
one of the many things I've never though about making and there's many times it would have been great in a pinch when the actual tools are many miles/days away. I nearly always have the needed materials laying around as scrap. I can just imagine the odd looks, whipping one together and using it at someones house :))
I’ve been really enjoying your videos and exploring some of the older ones. As a new first time home owner these have been very educational for me and have helped me to understand my homes systems. I was wondering, though, if you could do a video if you haven’t already on ceiling heat, like the electric radiators in the ceiling that can be adjusted for each individual room. I have seen your videos on ceiling diffusers, and I was wondering if they would be similar or if there are peculiarities with radiant ceiling heaters. We had them in a previous rental and we did not like them, and we believe that they were a significant source of high electric bills.
That is one that I have been meaning to do. Maybe this will get me moving.
GFM
very simple yet very useful!
Nice video, told a ceiling guy to use a water level when his lazer broke on a job and he had no idea what I was talking about. Old school always works. Thanks for the video's.
Welcome
GFM
I've been studying the slide rule, but it's easy to see why they discontinued producing them after electronic calculators came in. That said, a scientific calculator is not exactly easy to use either. Both take significant training or understanding.
so much knowledge, thanks ...
Great video thanks.
Thank you, very nice Idea you make a custom one
nice job i like it.it could be use also for automotive use to. thank
How expensive tools are nowadays, I might have to go back and make my own tools
It is NOT advisable to use red gauge oil unless it has a specific gravity of 1.0 or you create your own scale (a ruler won't work) Oil is less dense and will indicate higher pressure than water column pressure.
The content of this video and its presentation both are really helpful to build a manometer. Would this be useful to measure static and dynamic air pressure of the air outlet side in a household vacuum cleaner?
Yes. You may need longer tubing.
GFM
How Can we change it into pascal?
I have looked at your list and I can't find the video where you show this homemade manometer in operation. You indicated a future video would be forthcoming. Did I miss it?
Is the end of the tube were the fluid rises open to the atmosphere? Do you put plugs in to transport it? Also, can't you use the fluid in the two tubes to level it?
It is open. You can add fluid to level, but it is easier to get it close with fluid then fine adjust with the scale.
GFM
I have my testo 510 plus my regin specific gravity plus a few backup. O yeah plus the manometer on my Testo Analyser.
Still kudos to your tutorials. Respect from the uk. We use Millibars in the uk why do you across the continent use inches? Does any country measure in pascals?
Its just inertia. Most industrial use is in pascals.
GFM
Nice video as always! Just curious- Would using oil instead of water affect the accuracy of the tester since oil is less dense than water? I presume that it would chance the reading a tiny bit, but not enough to matter. Thanks!
The red gauge oil is the same density as water.
GFM
@@grayfurnaceman Cool, thanks
@@grayfurnaceman So does that mean that it will mix with water since the density is the same?
Beats me
GFM
It has to have a specific gravity. Somehere in the region of 1.0 SG. For standard tube. Manometers which are shorter in lengh have smaller tubes. So the specfic gravity of the fluid tubes tends to be higher. So the fluid can flow easier. You shouldn't add any colouring agents to your manometer as it makes the SG more dense. 😊
Unrelated to this video i have a question. First of all your videos helped me fix my furnace and i thank you.
My furnace fan kicks on and off the whole time the furnace is running and then over and over again after the furnace shuts off. Is there something wrong?
The fan should run continuously during the on cycle. You probably have a heat operated fan switch and it is cycling the fan. The on and off temp settings may need to be reset farther apart.
GFM
@@grayfurnaceman do u have a video on that?
I have a number of them. Try this one: ruclips.net/video/QpHfFdk04u0/видео.html
GFM
That is cool
you had me at "clampy-poos"
Neatest darn thing I've seen..
The liquid inside the tube is your spirit level. Water will ALWAYS find its level. If you hang the device it will act as a plumb bob. Standing water will ALWAYS be 90° to a plumbline
If your WC is reading 8 WC, I'm assuming it's propane gas which should be 11 WC. Natural gas would be around 6 or 7 WC ............. right?
In most areas, natural gas is 8 inches wc. If it is propane, I would expect 10 to 11.
GFM
Blue windshield fluid for liquid... Does not freeze, cheap, easy access....
Problem here is it is not the same specific gravity as water.
GFM
@@grayfurnaceman yes, agreed... So food coloring and water is preferred...
How much is diameter of tube used here?
1/4" inside.
GFM
@@grayfurnaceman Doesn't the tubing diameter affect the reading? Does it have to be 1/4'' ID to be accurate?
@@zoharflax6363 It does. Anything below 1/4" will be affected by capillary action. Larger is ok.
GFM
@@grayfurnaceman I am confused. I thought the video said you used 3/16 ID tubing. As the barb is a 3/16 barb. Did I misunderstand?
Does it matter how much water do you put in tube?
Enough to level out at 0 inches.
GFM
@@grayfurnaceman I guess it doesn't matter as long as it is not excessive.
Thank you
@@grayfurnaceman I have a question is it gas valve if I am getting zero pressure on the outlet side of the valve and 4" wc on the inlet side? I call feel the valve clicking and the igniter sparking and visibly see it but no gas at the burners. I replaced the control module because no spark and once I took it off one of the traces was visible burnt and broken. When I make the call for the furnace to turn on at the mechanical thermostat I see it go through the sequence to light just not getting no gas on the outlet side of the gas valve. The gas valve is White-Rodgers 36h32-406. I have another gas valve on the way which is newer version of that one. Same specs.
I just wonder if I'm missing something.
@@rlicon1970 Most valves require 5" WC at the inlet and I would prefer 7". Might check with the gas supplier.
GFM
@@grayfurnaceman I just checked it is at 6 1/2. The other furnace is working properly. The spec says 1/2 psi Reg 3.5 wc. I am hoping this is the problem because I already ordered it. I was just hoping I was not missing something.
When the impostor is from the among us impostor
Your measurements are way off. You should just measure the vertical distance from the equal water level.
So how much of a man are you?
Thank you, very nice Idea you make a custom one