(Part 2) Reddit mentions: The best lab digital thermometers

This is the best

https://www.amazon.com/gp/aw/d/B001VXZVNG/ref=ya_st_dp_summary

I'm using the Bitspower one and have been very happy with it. In my case I placed it in one of the bottom ports of my radiator. The length of the sensor doesn't really matter, as long as the water flows across it.

I'm also using one of these for the display Keynice Digital Thermometer

Those dial thermometers are notoriously inaccurate. I fix appliances and have been in many a house where they say their oven is too hot or not hot enough and its just one of those dial thermostats that's messed up. I use a multimeter however you can get something like this if you really want.

https://www.amazon.com/Digital-k-type-Thermocouple-Thermometer-Furnace/dp/B00G0PFS4C

There are cheaper versions on eBay or fast tech from China you can get.

Almost all ovens can be calibrated. Ones with digital controls are easier to do so and there should be instructions in your owners manual. Usually the range is 30° in either direction. When you do calibrate your oven you want to have a quick read thermometer in it and run five cycles. Listen for the click of the relay that signifies the control board shutting off the flow of electricity (to the element or ignitor doesn't matter) and record that temp for your first high. Wait for it to click back on and record that temp for your first low. Let the oven cycle 4 more times and record those temps. The first set will be way out of range throw those temps out. All all the lows and add all the highs. Divide each by 4. The difference between the result and the set temp is how such your oven is off. Most ovens cycle 25 or so degrees above or below the set temp. Some whirlpool ovens from the mid 2000's and a few he models kept to within 10 degrees.

All that being said never take the cook time in a recipe as absolute law. There are many other variables such as the temp of the item going into the oven, the oven itself, the temperature of the room around the oven and differences in fat and bone content of different pieces of meat. Get s good probe thermometer you can use to monitor the temp of what you are cooking and remember to calibrate the probe with a glass of ice water.

>And yes, i also have an arduino which controls 2 12V rails (Light & air) via mosfets which is connected to a humidity and temperature sensor

Well, who else here is going to do that? You keep missing that point. I don't care what you or I can do. I've got about a dozen Aduinos, dozens of sensors laying around, etc etc. Big deal. I care about what others can do so their problems can be solved.

Most people here are beginners and most don't have Arduinos, they just want to grow some pot. You are completely missing the point about others not being able to even duplicate a simple 555 timer design- I don't care if you can and already assumed you could.

>very sensitive to the vapor pressure in a high light environment (Which does not exist if the light is off)

This does not matter if plants are freezing to death when the lights go out. You are also missing this point. A common question is "can I grow out in my garage in winter". Now solve that problem without using an Arduino.


But I'm running tests. I get about a 1 degree F temperature rise for every 1 watt input with a power resistor (peltier module) in a five gallon bucket with no extensions. I'm using a four input temperature meter calibrated to a Fluke 287 that is calibrated to an ice bath.

I'm also doing testing with a 55 watt UFO in a bucket with a single 40mm exhaust fan at 0, 4, 6, 12, and 14 volts (because you can buy a cheap variable power supply so the layman could duplicate this). I'll post results later on a separate thread since you got me curious about this.

https://imgur.com/a/8CwTLsy



BTW, I got my hands on the Teesy 4.0 it's really a remarkable Arduino controller being super scalar at 600 MHz. This is a deal at $20 and you should pick one up.

edit- little bit of grammar

You could always compare your bike temp sensor reading against a temperature probe.


They're pretty cheap to buy:
https://www.amazon.co.uk/Silverline-469539-Pocket-Digital-Thermometer/dp/B000QHD09K/

I have had this thermometer before. After a few months, it was variably off +/- 20 degrees when it was checked for accuracy.

Now, a good thermometer is Cooper. Check out this one. Had it for about 2 years. Totally waterproof. 100% accurate every time. Instant readings.

http://www.amazon.com/Cooper-Atkins-Digital-Waterproof-Thermometer/dp/B000LDI8PK/ref=sr_1_2?ie=UTF8&qid=1370694381&sr=8-2&keywords=cooper+thermometer

These are terrible. For snakes, you want to ditch the coloured bulbs & go for ceramic emitters (http://www.amazon.com/BYB-Ceramic-Infrared-Emitter-Brooder/dp/B00HFNZ59Q) in a porcelain clamp lamp such as http://www.amazon.com/Zoo-Med-Deluxe-Porcelain-8-5-Inch/dp/B0002AQCXM/ attached to a stand such as http://www.amazon.com/Zoo-Med-Reptile-Stand-Economy/dp/B000HG76B8 (highly recommended as ceramic emitters are a large fire hazard, reaching over 700f) . Exo terra terraniums such as http://www.amazon.com/Exo-Terra-Short-Terrarium-12-Inch/dp/B008N9LYJ6 are great for beginner snakes which don't have unusually high humidity requirements (mesh tops found on glass tanks let out lots of humidity compared to e.g. plastic tubs with air holes melted via soldering iron). While the ceramic emitter will raise the ambient temperature, your snake will also want a very warm spot to go to for belly heat to aid digestion, so a heat mat such as http://www.amazon.com/Zoo-Med-ReptiTherm®-Heater-Medium/dp/B0002AQCL4/ attached to a thermostat such as http://www.amazon.com/MTPRTC-ETL-Certified-Thermostat-Germination-Reptiles/dp/B000NZZG3S/ is highly recommended. The thermostat is not optional as heat mat's reach over 105f which can be fatal. As for supplementary light in e.g. winter, snakes have no special requirements as compared to other reptiles for uva/uvb, so any desk lamp or room lighting would suffice. As for decoration, snakes don't care. Hides can be made out of cereal boxes, butter containers etc, substrate can be newspapers, shredded tissue paper (not shredded paper as it causes cuts), or you can research more professional substrate for your specific snake (beware the earthy substrate which can cause impactation/death if ingested, also wood chips can harbour mites - simple paper is often better!). As for monitoring humidity/temperature within the tank, the analogue ones suck. I would recommend a digital one such as http://www.amazon.com/Avianweb-Digital-Thermo-Hygrometer-Black/dp/B00U2S6JSC/ - even if 10% out as per reviews, they are better than analogues which are 20-30%+ out and get more inaccurate over time. Finally, not required, but useful is an ir gun such as http://www.amazon.com/Etekcity-Lasergrip-774-Non-contact-Thermometer/dp/B00837ZGRY/ so that you can get a sense of the surface temperatures around the tank that your snake is crawling across, and to ensure your hot hide is within parameters and not lethally exceeding 105f.

This is what I ordered last year. 6 bucks. Just search for "mini hygrometer" on amazon and you'll find lots of them.

I know a number of pros that use these because they're: accurate, quicker than they're rated, and won't break the bank if one walks off.

https://www.amazon.com/dp/B000LDI8PK

I just ordered this the other day. I think this fits the bill for what /u/SHv2 needs.

https://www.amazon.com/gp/aw/d/B01M5BCIFR?psc=1&ref=ppx_pop_mob_b_asin_image

Assuming you're wanting a thermometer to double check your tank temp?

I have this one which has been super accurate with no problems for 6 months so far.

VEE GEE Scientific 83211-12 High Accuracy Digital Thermometer 12" Stem (Pack of 1) https://www.amazon.com/dp/B01EIQ6SPM/ref=cm_sw_r_cp_apa_i_PXVRDbWAJCYPE

Psychrometric slide rule. It's a slide rule to calculate relative humidity (RH).

Example here

Still available for sale

I use this one:

https://www.amazon.com/gp/product/B001VXZVNG/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Do you have a thermometer you could hold up to the blower? Or, can you buy a cheap one like this?

Infrared thermometer.

IR thermometers won't work well on something that small or that shiny. A temperature meter with a contact sensor is what you want. (example)

see for yourself.

buy this http://www.amazon.com/Extech-42500-500-degree-260-degree-Thermometer/dp/B0000WU19S
and point it at your ceiling on a sunny day and see how hot it is in different places. hell, try your walls. you'll see where the heat comes in. studs and rafters are good heat conductors.

if your AC works no harder at all to cool your house at night than in sunlight, then you do not need a radiant barrier.

Probably wise to have an insurance policy:

TmallTech 12V Red Digital Fahrenheit degree Thermometer High Low Alarm -76-257F Temperature https://www.amazon.com/dp/B0114AWZMA/ref=cm_sw_r_cp_awd_kJANwb151NF7T

https://www.amazon.com/Thermocouple-Thermometer-RISEPRO-Channel-200-1372%C2%B0C/dp/B07D9JF5SD

If you don't need a lot of precision go with a cheap setup like that. Only has about 1 degree of accuracy.

If your air temps ever hit 65 degrees it means your ventilation is terrible. Just don't use a restrictive front panel, and at least 2 case fans.

Most of the heat would come from the PSU. If you read the link to the Prusa blog, they reached a max of 38C in the enclosed photo tent. With the Lack tables they are keeping the PSU outside. I suspect that you are looking at 30 to 35C without the PSU with the Lack tables which is fine. Much of it will depend on what is the outside temp. I plan to also drill a hole and add a temperature gauge like this one

I have never had good luck with any spring type oven thermometer. Either they are way off from the beginning, or they get less accurate as time goes by. I got so sick of it I bought a multiprobe thermocouple thermometer specifically to calibrate my ovens.

I got one of these: https://www.amazon.com/Lollipop-Thermometer-TRACEABLE-Control-Company/dp/B00JX4X6QY/ref=sr_1_15?crid=XGCZ27DJ65L&keywords=traceable+thermometer+calibrated&qid=1569890071&s=gateway&sprefix=traceable+thermom%2Caps%2C229&sr=8-15

It's been reliable and accurate, and I've used it for the last several years with no issues.

Hey, sorry I'm slow. Imgur just wouldn't let me sign in. Here's a pic of the sr500 with the thermometer.

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https://i.postimg.cc/kX2Y61sy/roaster.jpg

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And here's a pic of my most recent roast profile. I just enter the temp every few seconds into an Excel firm. Then I plot the temperature and the first derivative of temperature. I don't do this every roast, as it's kind of a pain. Just with new beans.

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https://i.postimg.cc/TPJtMZ2T/Screen-Shot-2019-05-07-at-9-22-22-AM.png

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Also, the thermometer & probe can be found here for about $15:

https://www.amazon.com/58F-1382F-Digital-Thermometer-K-probe/dp/B01M2Z11QF

Cooper-Atkins DFP450W-0-8

I have one of these. Its cheap, seems to be spot-on accurate, and quick. The other day the screen broke (probably my fault I put in the dishwasher) and I emailed their CS and they just sent me a new one no questions asked. They just told me to toss out the old one and the new one would get mailed to me at no cost to myself at all. I was very pleasantly surprised.

I'm about to purchase my second of this model.

Amazon

My first suffered a tragic paint stirrer accident.

Do you use any oil at all?

If so, learn about smoke points.

https://en.wikipedia.org/wiki/Smoke_point

Do you measure (I use a laser-guided thermometer like this: http://www.amazon.com/Raytek-MT4-Laser-Non-Contact-Thermometer/dp/B0000WUM4C) the heat of the pan as you go along?

It is possible to heat up your pan too much before you toss in your meat.

If you don't know what is what, you could easily make more smoke than you want.

I have never - read: never - made my cooking set off the fire alarm.

There are some folks here who want to tell you that their fire alarms are so close to their stove that they always get an alarm... but I suspect that their crappy setup can't help you learn what you need to do.

Some smoke? OK - that might fit what folks see when they make food that they like. I have no argument with that.

So much that you think there's something wrong?

Take a reasoned look at what you are doing, and proceed accordingly.