Dimming thermostat sensor

[DiXX]

Thanks Brandon. I am confused but then I am female ??. Now I have another problem. The habistat dimming thermostat is set at 100 because I know there is a couple of degrees variant. But the temp gun when pointed at the top of the basking log is 116 and the digital thermometer is showing 98.8 :/ My heat bulb is an Arcadia halogen 75w and the probe of the thermostat is still where it is in picture. So what’s going on. ? I’m losing the will to live and Dobby has gone back to bed ??

 

[Claudiusx]

So all three are measuring the same spot but are all that far off each other?

Remember the probe ends can take 15 minutes to fully reach the temp they are reading.

So what’s going on. ? I’m losing the will to live and Dobby has gone back to bed ??

Lol. Temperatures can be a finicky beast. But once you have them all set you are good!

-Brandon

 

[DiXX]

As close to same spot as can be. I had a couple of bearded dragons 12 years ago and never had this problem ha ha. I used the habistat dimming stat back then that’s why I changed. I have another digital thermometer arriving tomorrow and I think I’ll get another infrared temp gun too. Just to be on safe side. Can you recommend one that I can get here in England ? On a plus when Dobby gets up in the morning that’s it for the day, she don’t go back to her cave until she’s ready for bed again, she comes out to sit on the windowsill for around an hour and half

 

[CooperDragon]

Habistat and Microclimate are the ones I hear about most in the UK. Swell reptiles carries them among many other goodies.

 

[kingofnobbys]

Thanks Brandon. I am confused but then I am female ??. Now I have another problem. The habistat dimming thermostat is set at 100 because I know there is a couple of degrees variant. But the temp gun when pointed at the top of the basking log is 116 and the digital thermometer is showing 98.8 :/ My heat bulb is an Arcadia halogen 75w and the probe of the thermostat is still where it is in picture. So what’s going on. ? I’m losing the will to live and Dobby has gone back to bed ??

The probe on the thermostat is correct. I believe that Habistat calibrate their temperature probes in a laboratory.

The gun thermometer is likely in need of emissivity adjustment and there is a high biased systematic error causing you think the termperature is higher than it actually is (likely seeing the reflection of the basking globe in the measuring area <== specular error).
.
viewtopic.php?f=34&t=239064&p=1833542#p1833542
explanation of why your gun is not giving the correct surface temperature is here:
viewtopic.php?f=34&t=241233

Learn from these links , look up the correct emissivity for basking spot's material & surface , and learn to make sure you are close to the target surface and not accidentially capturing reflected radiant heat from the heatsource . Don't beat yourself up over this , I'm a retired physicist and thermal metallurgical research engineer and I've known professional engineers and physicists and thermographers to make these mistakes (at a considerable cost to their client not just their consulting fee (often in the order of $500 per hour onsite time)).

 

[DiXX]

Thank You for all your help. I think I’ll just order a new gun I have read some reviews about the reptile one gun and some say they not entirely accurate. I mean the gun says 116 degrees yet I can quite comfortably leave my hand on the log without getting hot :/ I’m just not sure which gun is the best

 

[kingofnobbys]

Thank You for all your help. I think I’ll just order a new gun I have read some reviews about the reptile one gun and some say they not entirely accurate. I mean the gun says 116 degrees yet I can quite comfortably leave my hand on the log without getting hot :/ I’m just not sure which gun is the best

Check out Ebay and Amazon.

Plenty of nice guns there .

> I'd look for some suitable for pottery and checking kitchen oven temperatures

> spot as small as you can find (typically they are 12:1, I'm using one that has a spot that's 20:1, in industry and laboratories I've used high accuracy high temperature range ones with spots 100:1

> adjustable emissivity is a must IMO , mine does this.

> calculation mode (mean , max, min, medium , standard deviation) are good features to have too, mine does this.

 

[Claudiusx]

You can test your probes in an ice water bath. Just make sure the probes aren't touching any of the ice.

-Brandon

 

[kingofnobbys]

You can test your probes in an ice water bath. Just make sure the probes aren't touching any of the ice.

-Brandon

That test is only applicable if you interested in checking calibration at near the freezing temperature of water , it will tell you very little about the accuracy at 40 degC say.
It assumes that the error that you detect will be the same at the warm zone temperature and the basking spot temperature and that the thermometer's response is linear with the same slope throughout the entire range of temperatures of interest (VERY UNLIKELY).

See this for an explanation and ways to methodically check the thermometer : viewtopic.php?p=1819655

 

[Claudiusx]

That test is only applicable if you interested in checking calibration at near the freezing temperature of water , it will tell you very little about the accuracy at 40 degC say.
See this for an explanation and ways to methodically check the thermometer : viewtopic.php?p=1819655

Digital with probe ends (most) and OPs thermostat don't read temperatures up in the 212f (100c) range, So that test is not very useful which is why I only mentioned the ice.

-Brandon

 

[kingofnobbys]

That test is only applicable if you interested in checking calibration at near the freezing temperature of water , it will tell you very little about the accuracy at 40 degC say.
See this for an explanation and ways to methodically check the thermometer : viewtopic.php?p=1819655

Digital with probe ends (most) and OPs thermostat don't read temperatures up in the 212f (100c) range, So that test is not very useful which is why I only mentioned the ice.

-Brandon

Not necessarily so, however I gave a number of standard melting and boiling point substances that offer lower temperature standardization points that are in the range 20 - 50 degC.

The digital thermometers I use are rated for ：-50°C ~ +70°C .

 

[Claudiusx]

I gave a number of standard melting and boiling point substances that offer lower temperature standardization points that are in the range 20 - 50 degC.

Your list:

Acetaldehyde = 20.4
Danger! Air sensitive. Oxidizes readily in air to form unstable peroxides that may explode spontaneously. Extremely flammable liquid and vapor. Vapor may cause flash fire. Causes severe eye irritation. Lachrymator (substance which increases the flow of tears). Causes respiratory tract irritation. May be harmful if swallowed. May cause skin irritation. May cause cancer based on animal studies. May cause lung damage. May cause central nervous system depression. May cause liver and kidney damage. Marine pollutant. Store in explosion-proof refrigerator. Hazardous polymerization may occur.
Target Organs: Blood, kidneys, central nervous system, liver, lungs, eyes, skin.

Acetone = 56.3
Horible idea to boil at home, but still out of range for most probes.

CS2 = 46.5
Lol, not feasible to get. Not to mention it's an actual poison (not just an MSDS scare

Methy Acetate = 56.3
Highly flamable, not to mention, boils too hot once again.

Methyl Formate = 31.5
Once again, flamable and a decent iritant. You are not going to be wanting to boil this at home.

Iodo Methane = 43.4
Extremely volitile. Decent health hazard, its a carcinogen, and it's toxic if inhaled. Hello boiling.

I'm surprised you didn't google these since you seem to google every item I suggest lol.

And as far as melting point suggestions. That is too difficult to be accurate with too as you have to have the item in a climate controlled environment that is riding the line of it's melting point, otherwise, its liquid form will be affected by the surrounding rooms temperature.

I don't like making suggestions that 99.9% of the population can't use, hence the ice water test.

If you want to discuss it more, you can PM me, as we are detracting from the OP's posts at this point.

-Brandon

 

[kingofnobbys]

I gave a number of standard melting and boiling point substances that offer lower temperature standardization points that are in the range 20 - 50 degC.

Your list:

Acetaldehyde = 20.4
Danger! Air sensitive. Oxidizes readily in air to form unstable peroxides that may explode spontaneously. Extremely flammable liquid and vapor. Vapor may cause flash fire. Causes severe eye irritation. Lachrymator (substance which increases the flow of tears). Causes respiratory tract irritation. May be harmful if swallowed. May cause skin irritation. May cause cancer based on animal studies. May cause lung damage. May cause central nervous system depression. May cause liver and kidney damage. Marine pollutant. Store in explosion-proof refrigerator. Hazardous polymerization may occur.
Target Organs: Blood, kidneys, central nervous system, liver, lungs, eyes, skin.

Acetone = 56.3
Horible idea to boil at home, but still out of range for most probes.

CS2 = 46.5
Lol, not feasible to get. Not to mention it's an actual poison (not just an MSDS scare

Methy Acetate = 56.3
Highly flamable, not to mention, boils too hot once again.

Methyl Formate = 31.5
Once again, flamable and a decent iritant. You are not going to be wanting to boil this at home.

Iodo Methane = 43.4
Extremely volitile. Decent health hazard, its a carcinogen, and it's toxic if inhaled. Hello boiling.

I'm surprised you didn't google these since you seem to google every item I suggest lol.

And as far as melting point suggestions. That is too difficult to be accurate with too as you have to have the item in a climate controlled environment that is riding the line of it's melting point, otherwise, its liquid form will be affected by the surrounding rooms temperature.

I don't like making suggestions that 99.9% of the population can't use, hence the ice water test.

If you want to discuss it more, you can PM me, as we are detracting from the OP's posts at this point.

-Brandon

Roll the eyes.

All readily available in high school chemistry laboratory.

There are other options.
The VERY best option is purchase a type E or T thermocouple and junction and connect to a voltage meter. Though I can't see many here doing that even though it will give a highly precise and accurate temperature reading and the response of these is very linear.

Once again - you try to make a mountain out of molehill.

 

[DiXX]

Boys Boys. I have a gun on order now so I don’t need any more advice. Thank You ?. If I live to be 200 I still won’t know what your on about ??. But!! if I have a 75Watt halogen spot bulb will it still get to 100-105 degrees ? Or do I need a 100watt ?

 

[kingofnobbys]

Boys Boys. I have a gun on order now so I don’t need any more advice. Thank You ?. If I live to be 200 I still won’t know what your on about ??. But!! if I have a 75Watt halogen spot bulb will it still get to 100-105 degrees ? Or do I need a 100watt ?

Good - I hope you got a good one.

Temp from 75W halogen spot , depends on ambient & distance from the globe (will be trial and error getting it right).