author

paul13Z

Inbox View Profile
2Comments

Tell us about yourself!

  • DIY Non Contact IR Thermometer V1.0

    While this is a good project there is a flaw that will produce false positives.The MLX90614 is set to a emissivity of one at the factory. The emissivity of human skin is .95 to .98. If the emissivity of the object tested is lower than the set point of the sensor the temperature reading will be higher. There is a register on the MLX90614 (0x04) which can be used to set the emissivity to the correct value. If the emissivity is set to one (1) than all the readings will be too high. The result could be a serious problem for those individuals. They would waste time and money testing for something that did not exist. The other point is the temperature of the human is not a reliable method to detect if someone has Covid. Multiple studies thorough out last year conducted by NIH and others have s…

    see more »

    While this is a good project there is a flaw that will produce false positives.The MLX90614 is set to a emissivity of one at the factory. The emissivity of human skin is .95 to .98. If the emissivity of the object tested is lower than the set point of the sensor the temperature reading will be higher. There is a register on the MLX90614 (0x04) which can be used to set the emissivity to the correct value. If the emissivity is set to one (1) than all the readings will be too high. The result could be a serious problem for those individuals. They would waste time and money testing for something that did not exist. The other point is the temperature of the human is not a reliable method to detect if someone has Covid. Multiple studies thorough out last year conducted by NIH and others have shown that out of 5000 people that were positive for Covid less than 20% presented a temperature increase.Paul M PHD, MD

    View Instructable »