Your Yong Heng factory temperature gauge might not be accurate

[Redick]

I did a conversion from Celsius to Fahrenheit because I had a hunch that the factory temperature gauge was misleading. If you ever noticed the gauge reads between 21 and 24 degrees Celsius at all times. Well 24 Celsius equates to about 71 Fahrenheit. Now 71 Fahrenheit isn't hot but it isn't cold either. If the YH was actually 71 Fahrenheit the head and or rod would be warm and that's not the case. Have you noticed how the temperature rises almost instantly? A new temp gauge maybe needed fellas if you are using the factory one. Might get more run time between fills

 

[profsrgary]

Not saying your compressor doesn't need a new gauge but I do question your logic. Your body temp is 98.6 but if you touch a piece if steel and a piece of wood that have been lying side by side for a few hours they will feel different temperatures. So if you touch a piston rod at room temp of 71 it will feel cool because it is dense material and removes the heat from your finger quickly. The same test will feel different on a material like.a foam packing peanut even though it is actually the same temp. If you think you want to try a new gauge they can be bought in Fahrenheit on Amazon and Ebay. As far as the temp going up immediately, that is because these things heat up fast. I accidentally got my arm against one of the steel tubes and got burned and my compressor never runs longer than 30 seconds since I only use it to top off my Mrod.

 

[Guest]

For the most accurate reading calibrate to zero degrees Kelvin. Once done entropy exchange can be accurately measured.

 

[vdwb]

The temp probe just hangs off of the bottom side of the temp gauge on my Yong Heng and imo is only a motor temp indicator. Most of the heat generated comes off the water cooled head and there’s no way the temp gauge is showing head temp. Just the motor and case temp.

Edit:

Thanks vinny and molder for educating me where the probe goes, I thought that was a stupid place to read temperature, I guess I need to find some instructions, lol

 

[vinny]

It doesn’t just hang off it goes into the hole on the back of the head

 

[molder]

 this hole is where the temp probe goes 

 

[Dankleinman]

Mine runs between 44-50 c when it's running a while if it starts to get warmer than that I just add some more water to the bucket . I fill my scba tanks in the bathroom and keep my 5 gal bucket in the tub when it starts heating up the water I let the line drain into the tub and when the bucket is about half empty I fill it back up with cold water . Also if it's really warm I will put a box fan behind the compressor as I don't think the little fan that comes built into the unit moves very much air . I don't think my compressor has ever gotten above 56c . It's only had about 6 hours of run time so far and I have changed the oil in it about every 40 min or so . 



Dan 

 

[Redick]

Not saying your compressor doesn't need a new gauge but I do question your logic. Your body temp is 98.6 but if you touch a piece if steel and a piece of wood that have been lying side by side for a few hours they will feel different temperatures. So if you touch a piston rod at room temp of 71 it will feel cool because it is dense material and removes the heat from your finger quickly. The same test will feel different on a material like.a foam packing peanut even though it is actually the same temp. If you think you want to try a new gauge they can be bought in Fahrenheit on Amazon and Ebay. As far as the temp going up immediately, that is because these things heat up fast. I accidentally got my arm against one of the steel tubes and got burned and my compressor never runs longer than 30 seconds since I only use it to top off my Mrod.

You can not compare a piece of steel to a piece wood! I question your logic on that.! That's apple's to oranges! 

 

[Rodeo]

I bought a three pack of the farenheit calibrated temp gauges on Amazon for about $11. I had another use for the gauge so went ahead and got the three pack. My old celcius gauge and the new gauges are identical (except for unit of measure obviously). They are also VERY close in measured temp.

The slight difference in readings could very well be that the farenheit gauge probe is in contact with the aluminum compressor head and the celcius unit is reading ambient air. Both have been in the same room for days.

 

[Redick]

I bought a three pack of the farenheit calibrated temp gauges on Amazon for about $11. I had another use for the gauge so went ahead and got the three pack. My old celcius gauge and the new gauges are identical (except for unit of measure obviously). They are also VERY close in measured temp.

The slight difference in readings could very well be that the farenheit gauge probe is in contact with the aluminum compressor head and the celcius unit is reading ambient air. Both have been in the same room for days.

Very good find Rodeo! I appreciate that 

Hard to argue visual facts. Actually it's dead on 18.6 comes to 65.4 so dead even

 

[DemWitt]

Pie are round,....cornbread are square



some of the cheap IR guns work well for stuff like this

 

[Pacoson71]

just got my Yong Heng on Friday. Thermostat and my IR thermometer are close to 2 degrees off in either direction....

Close enough for me, But I did need to check!!!!

 

[profsrgary]

Not saying your compressor doesn't need a new gauge but I do question your logic. Your body temp is 98.6 but if you touch a piece if steel and a piece of wood that have been lying side by side for a few hours they will feel different temperatures. So if you touch a piston rod at room temp of 71 it will feel cool because it is dense material and removes the heat from your finger quickly. The same test will feel different on a material like.a foam packing peanut even though it is actually the same temp. If you think you want to try a new gauge they can be bought in Fahrenheit on Amazon and Ebay. As far as the temp going up immediately, that is because these things heat up fast. I accidentally got my arm against one of the steel tubes and got burned and my compressor never runs longer than 30 seconds since I only use it to top off my Mrod.

You can not compare a piece of steel to a piece wood! I question your logic on that.! That's apple's to oranges!

Exactly my point. You were using your finger to determine how hot or cold the piston was and I was merely stating at the exact same temp two items will feel different degrees of warmth or cold. My logic is that you can not expect a metal piston to feel warm to the touch at 71 degrees Fahrenheit unless your body temp is under that temp.

 

[Redick]

Not saying your compressor doesn't need a new gauge but I do question your logic. Your body temp is 98.6 but if you touch a piece if steel and a piece of wood that have been lying side by side for a few hours they will feel different temperatures. So if you touch a piston rod at room temp of 71 it will feel cool because it is dense material and removes the heat from your finger quickly. The same test will feel different on a material like.a foam packing peanut even though it is actually the same temp. If you think you want to try a new gauge they can be bought in Fahrenheit on Amazon and Ebay. As far as the temp going up immediately, that is because these things heat up fast. I accidentally got my arm against one of the steel tubes and got burned and my compressor never runs longer than 30 seconds since I only use it to top off my Mrod.

You can not compare a piece of steel to a piece wood! I question your logic on that.! That's apple's to oranges!

Exactly my point. You were using your finger to determine how hot or cold the piston was and I was merely stating at the exact same temp two items will feel different degrees of warmth or cold. My logic is that you can not expect a metal piston to feel warm to the touch at 71 degrees Fahrenheit unless your body temp is under that temp.

Point taken

 

[Ponz]

just got my Yong Heng on Friday. Thermostat and my IR thermometer are close to 2 degrees off in either direction....

Close enough for me, But I did need to check!!!!

No matter where I aim the gun, even next to the thermometer probe, the gun reads about HALF the temp of the compressor thermometer. Where are you aiming your gun?

 

[IMADMAN]

Mine is at 32c when it’s off and about 80f outside. I only fill guns and don’t let it go past 58c. I use about 3.5 gal of cool water and a 10” fan. I haven’t made the effort to either change it to Fahrenheit or replace the gauge and wire.

 

[oregondude]

Over 4yrs with my $239 YH. I use an intermittent hydroponics timer when filling large vessels such as a scba tank. 50°c is the max I allow. I run about a 2.5 min. run cycle and 3 min off cycle. About every 3 to 4 cycles I pop the bleed valves to blow out the moisture. A 65cf scba takes over 2hrs to fill from ambient to 300 bar. But when taking it from say 2500psi to 4500psi is much quicker. Not too many people have reported their YH lasted that long. Under 50°c is the key, I believe. Ofcourse a crank case full of good oil is a must as is bleeding it during run cycles. Bill and Addi.

 

[JimD]

I let mine go to 60 degrees by the admittedly unimpressive gauge. I also bought several replacements after the first one failed. I think I got them from Aliexpress. I think run time is a reasonable substitute for the temperature gauge, however. I know mine will not be too warm after 15-20 minutes which is normally enough time to lift my 45 minute SCBA from around 3000 to around 300 bar.

 

[Ponz]

No matter where I aim the gun, even next to the thermometer probe, the gun reads about HALF the temp of the compressor thermometer. Where are you aiming your gun?

Bump...