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Adtemp™ 421

Tympanic IR Thermometer

Ordering Information


Type: Tympanic

Speed: 1 sec

Product Reference: 
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Product Description

Probe-cover-free design makes the Adtemp™ 421 tympanic thermometer ideal for home care.

The Adtemp™ 421 features:

  • Measures core temperature instantly from the ear reliably and accurately
  • Wide measurement range of 32.0°F to 212.0°F ± .2°F or 0.0°C to 100.0°C ± .1°C depending on scale selection
  • Probe cover FREE design is less costly and more convenient to use
  • Large (6 mm) illuminated display is easy to read
  • Compact (5” long, 1.9 oz.) ergonomic design fits comfortably in operator’s hand and patient’s ear
  • Audible fever alarm at 99.5°F (37.5°C)
  • 12-reading memory
  • Complete with lithium battery, storage/travel case, and operating instructions
  • Meets ASTM E1965-98 standards for accuracy

This product not available for sale in Canada.

Type: Tympanic
Technology: Peak-hold
Scale: Dual (°F/°C)
Range °F: 32.0 to 212.0
Range °C: 0.0 to 100.0
Accuracy °F: 0.2
Accuracy °C: 0.1
Response Time: 1 sec
Beeper: Yes
Auto-off: Yes
Memory: 12-reading
Flex Probe: No
Needs Sheaths: No
Warranty: 2 Year
Battery Type: CR2032
Battery Life: 1000 uses
Latex Content: Not made with natural rubber latex
Packaging: Giftbox
Dimensions: 5” x 1.2” x 1.6” (127 mm x 31 mm x 40 mm)
Weight: 1.87 oz (53 g)
Display: LCD
Operating Environment: 50°F to 104°F (10°C to 40°C)
Storage Environment: -13°F to 131°F (-25°C to 55°C)


Literature Name Download
English Adtemp 421 Digital Ear Thermometer - Instructions for Use Download
Español Adtemp 421 Termómetro digital - Instrucciones de uso Download
Français Adtemp 421 Thermomètre numérique - Mode d'emploi Download
Deutsch Adtemp 421 Digital-Thermometer - Gebrauchsanweisung Download
Italiano Adtemp 421 Termometro Digitale - Istruzioni per l'uso Download
Features at a glance:
  • Latex Content

    This products is not made with Natural Rubber Latex

  • Phthalate Content

    This products is made without phthalates

  • Dry Cell Battery Included

    Alkaline, Carbon Zinc, Lithium, Silver Oxide battery(s) included. See spec tab on product page or IFU for specific battery information.

  • 1 Second Measurement

    Temperature reading in about 1 second.

  • Audible Alert

    Distinctive beep when temperature measurement is complete, unit powered on/off.

  • Backlight Display

    LCD with backlight during measurement or when measurement is complete.

  • Jumbo Display

    Extra large LCD for easier viewing.

  • Dual Scale

    Temperature readout in EITHER Celsius or Farenheit. Farenheit is default.

  • Water Resistant

    Splash resistant to class.

  • Displays last 12 measurement results.

  • 2 Year Warranty

    Warranty extends to the original retail purchaser, commences with date of delivery and extends for a period of two years.

  • CE Mark


    This product is marked for use in the EU.

  • Domestic Content

    Inspected in the USA

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