Misc. What emissivity should I use for LED strips?

  • Thread starter Thread starter HomeExperiement
  • Start date Start date
  • Tags Tags
    Emissivity Led
AI Thread Summary
To accurately measure the heat of LEDs on a DIY panel using an infrared thermometer, it's crucial to consider the emissivity of the surface being measured. The emissivity of white plastic is approximately 0.84, which may be suitable, but other materials could provide better accuracy. The infrared thermometer's readings can be affected by the light emitted from the LEDs during measurement, so it's important to calibrate the device properly. Calibration can be done using a thermocouple or by placing the thermometer in a temperature-controlled oven to ensure it equilibrates before measurement. The primary objective is to measure the temperature of the components to adjust the voltage and prevent heat damage to the LEDs. The specific LED color, in this case, is white (1800K), and the focus is on measuring the temperature of the electrical components rather than the power dissipated or infrared light emitted.
HomeExperiement
Messages
55
Reaction score
5
Hi!

I want to measure the heat of LEDs on my DIY LED panel with my infrared thermometer. That means that wrong emissivity could be like +/- 10 C in some cases. Should I take emissivity of white plastic which is 0.84 or are there any better options? Also does IR thermometer care if light from LEDs is shining while measuring?

1637706483636.png
 
Physics news on Phys.org
Calibrate with a thermocouple (or similar contact thermometer)? Or, put it in a temperature controlled oven and leave it long enough to equilibrate, then use you IR device to measure its known temperature.
 
HomeExperiement said:
I want to measure the heat ...
What is "the heat" ?
What is the LED colour, white, grow, or IR ?
Do you want to measure:
1. The temperature of the electrical components, and/or the enclosure ?
2. The power dissipated by the assembly ? (maybe use power = current * voltage)
3. The infrared light emitted ?
 
Baluncore said:
What is "the heat" ?
What is the LED colour, white, grow, or IR ?
Do you want to measure:
1. The temperature of the electrical components, and/or the enclosure ?
2. The power dissipated by the assembly ? (maybe use power = current * voltage)
3. The infrared light emitted ?
LED color is white (1800K).
Want to measure the temperature of components so that I can adjust voltage to low enough to avoid heat damage to LEDs.
 

Thread 'Heating pad element sizing'

Three rabbits will be wintering in a 2m x 2m x 2m wooden hut. Outside temperature does not go below -30c (-22f) Planning to put a 50cm by 50cm 1mm thick stainless steel sheet on the floor of the hut (inside off course) My plan is to heat the sheet with a 50w PTC heater element https://fi.rsdelivers.com/product/dbk-enclosures/fg135600/dbk-enclosures-heating-element-75mm-50-w-100-240-v/dc/2995922?backToResults=1 Is this heater (50W) enough to keep the pad warm enough to sustain liquid...
View full post »

Similar threads

I Is This....Right? Splitting LED colors is not working for me
Replies
40
Views
3K
I Creating White LEDs: Phosphor vs RGB
Replies
5
Views
1K
I How do emissivity and absorptivity affect thermal imaging results?"
Replies
3
Views
3K
Deciding batteries for my circuit
Replies
3
Views
1K
Misc. Warming Barrels of Honey With Light
Replies
20
Views
3K
Can RGB LED simulate incandescent bulb 'glow'?
Replies
3
Views
3K
Misc. Isolation box to measure light source inside (closer to visible light)
Replies
21
Views
2K
I Why is there a sharp spike of blue light in my spectrometer readings?
Replies
9
Views
1K
How to power up a DIY LED panel with a PC PSU?
Replies
27
Views
5K
How Can I Use a Photodiode to Detect LED Light for Spectroscopy?
Replies
29
Views
5K

Hot Threads

Recent Insights

Back
Top