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Non-Contact Digital Display Forehead Thermometer 3 Color Alarm

Non-Contact Body IR Thermometer with 3 Color Alarm Backlight Display
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Item# OS-821

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 $102.30
5-10 $97.19
11-50 $92.07
51-100 $86.96
101-200 $81.84
201+ $76.73

Please contact Technical Sales Team for assistance. Any remaining stock is available for purchase

Only 3,715 left

Limited Stock
Non-Contact Body IR Thermometer with 3 Color Alarm Backlight Display OS-821 OS-821
  • Manual available below, refer to manual tab
  • Internal memory stores up to 34 readings for easy recall
  • Three color alarm backlight display visually show normal, slightly high, and high body temperatures

OS-821 Model Options

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Process Temprature Range
Accuracy @ Ambient
Operating Temprature Range
Built in Display
Supply Voltage
Response Time

  • Dimensions 5.7 x 3.1 x 1.6" (145 x 80 x 40 mm)
  • Optimum Measuring Distance 1.9” to 3.2” (5 to 8 cm)

The OS820-Series is designed to be a screening device to measure body temperature without contact. The easily visible three-color alarm backlight display makes it easy to detect higher temperatures during temperature measurement. This IR thermometer measures body temperatures from 89.6°F to 108.5°F (32.0°C to 42.5°C) and surface temperatures from 32°F to 212°F (0°C to 100°C). Ideal for use when measuring body temperature on individual’s forehead with a distance of 1.9 to 3.2" (5 to 8 cm).

The OS820-Series is good for initial screening in areas such as: large gatherings, buildings, factories, and schools/universities. The non-contact benefit of using the OS820-Series thermometer could reduce the spread of infectious diseases.

*This device is intended for screening purposes only, not to replace clinical thermometers or a professional diagnosis.

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Rated 5 out of 5 by from Excellent and sturdy I bought 100 pcs a month ago for use in my company. The users have been very happy with the ease of use and the speed of the temp taking. We have bought more and recommended to others too.
Date published: 2020-05-05
Rated 5 out of 5 by from Bought to open my facility for COVID-19. I bought A few of these to help in taking employee temperatures and detect fevers for COVID-19 coronavirus virus. It works quickly and good and is easy to use.
Date published: 2020-05-07
Rated 5 out of 5 by from IR Thermometer for COVID 19 Bought this for temperature measurement of employees coming to work. Good quality and simple to use.
Date published: 2020-04-30
Rated 4 out of 5 by from fast inspection of workers for covid-19 symptoms I bought this a few days ago and it works great for measuring the body temp of our workers as we test them for possible covid-19 infection. The only problem I had was getting it configured to show F and English commands vs the C and Chinese commands, which was the default configuration. The instructions on the Omega site were not quite accurate for reconfiguring but I found some other manuals and Youtube videos describing use of similar models and was able to figure out how to reconfigure it to F and English.
Date published: 2020-04-07
Rated 5 out of 5 by from Replacement My one of the two units broke down. I was pleased that they promptly sent a replacement. Company stands behind its customer service.
Date published: 2020-05-12
Rated 4 out of 5 by from 4 Stars Initially unit seemed to be giving low temps and without instructions it was hard to get used to but overall a great product. Took my temp today with the gun and an oral thermometer from work and they both gave the same temp!!
Date published: 2020-06-01
Rated 4 out of 5 by from Non-Contact IR Thermometer use review Overall it is a good product. Only draw back is temp range is wide enough causing a low temperature reading multiple occasion.
Date published: 2020-04-19
Rated 5 out of 5 by from Excellent product and company! The two thermometers purchased were delivered in a timely fashion with all tracking updates given. The product is as advertised and working well. absolutely no negative feedback - All good
Date published: 2020-06-05
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Easily change units from °C to °F in 2 steps. How do I change from Celsius to Fahrenheit?

Asked by: Glicker
Thank you for your inquiry Glicker. Please follow the instructions in page 3 of the manual. Here is the link:
Answered by: Application Engineer MC
Date published: 2023-02-09

What type of batteries are needed? Is this product reliable enough for use in a dental office to screen our patients

Asked by: Dr J
Thank you for your interest in our product The Non-Contact Infrared Thermometer OS-820D can be reliably used to measure Human body temperature and for other object surface temperature measurements Power 9V or 2x AA Batteries . Batteries are not included
Answered by: SAT_SAE
Date published: 2020-07-03

What is the country of origin for this product?

Asked by: kw15642
Thank you for your inquiry. Please contact us directly at
Answered by: Application Engineer CB
Date published: 2022-12-22
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