ADC Adtemp 424N Tympanic Ear Thermometer, 1-Second IR (424N)
The ADC Adtemp 424N (item 424N) is a professional tympanic (ear) infrared thermometer that displays a body temperature in about one second, with a color-coded backlit LCD that turns red at or above 99.5 F to flag a possible fever. Made by American Diagnostic Corporation, it recalls the last 30 time-stamped readings, switches between Fahrenheit and Celsius, and ships with a storage cradle, a built-in cover dispenser, and 20 disposable, latex-free probe covers. Pacific Biomedical supplies it as a genuine ADC device for EMS, clinic, urgent care, and hospital patient assessment.
Product Highlights
- Fast one-second infrared reading at the ear, non-invasive and well tolerated by patients who cannot hold an oral probe.
- Color-coded backlit LCD shows green for normal readings and turns red at or above 99.5 F, giving a quick visual fever flag during triage.
- Stores the last 30 time-stamped readings, so a trend can be reviewed and documented on the chart or run sheet.
- Switchable Fahrenheit and Celsius display with auto shutoff, running about 2000 measurements on two AAA batteries.
- Disposable, latex-free probe covers help reduce cross-contamination between patients, with a dispenser and 20 covers included.
- Meets EN ISO 80601-2-56 for clinical thermometer performance and is backed by a 2-year warranty.
Temperature Assessment in the Field and Clinic
Temperature is an easily overlooked vital sign, yet it sharpens field and triage decisions. Read alongside heart rate and respiratory rate, an elevated temperature helps flag possible sepsis, while low readings can point to environmental hypothermia, so capturing it completes the clinical picture.1
Tympanic infrared thermometry is fast, non-invasive, and hygienic, but like other peripheral methods it estimates rather than directly measures core temperature. A systematic review and meta-analysis of 75 studies found peripheral thermometers, including tympanic, fall outside a clinically acceptable range against central measurement and detect fever with limited sensitivity.2 An emergency department study likewise found tympanic readings can under or over estimate rectal temperature.3 A normal ear reading therefore does not rule out fever.
Good technique improves reliability. Use a fresh probe cover for every patient, position the probe as directed, and correlate the reading with the clinical picture and your local protocol. Per the manufacturer's Instructions for Use, the 424N is intended for the intermittent measurement of human body temperature and does not replace clinical judgment.
Specifications and Compatibility
| Specification | Detail |
|---|---|
| Manufacturer | American Diagnostic Corporation (ADC) |
| Item Number | 424N |
| Type | Tympanic (ear) infrared thermometer |
| Measurement Range | 89.6 to 109.4 F (32.0 to 43.0 C) |
| Stated Accuracy | ±0.4 F (±0.2 C) |
| Response Time | About 1 second |
| Display | Color-coded backlit LCD, red at or above 99.5 F |
| Memory | Last 30 readings with date and time stamp |
| Scale | Fahrenheit and Celsius switchable, auto shutoff |
| Probe Covers | Disposable, latex-free; replacements 424N-40 (40 ct), 424N-200 (200 ct) |
| Power | Two 1.5V AAA batteries, about 2000 measurements |
| Dimensions and Weight | 6.5 x 1.67 x 1.25 in; 3.17 oz (90 g) with batteries |
| Standard | Meets EN ISO 80601-2-56 |
| Warranty | 2 years |
| Latex | Not made with natural rubber latex |
| UPC | 634782101527 |
Complete Your Patient Assessment Kit
Pair the Adtemp 424N with the other American Diagnostic Corporation assessment tools Pacific Biomedical carries.
- Replacement probe covers: ADC Adtemp 424N Probe Covers (424N-40) (disposable, latex-free; keep a pack on hand)
- Stethoscope: ADC Adscope Lite 619 Clinician Stethoscope (lightweight, for lung and heart sounds)
- Blood pressure: ADC Multikuf 731 Portable 3-Cuff BP Kit (three cuff sizes to round out core vitals)
What's Included
- ADC Adtemp 424N tympanic thermometer (item 424N)
- Desktop storage cradle with built-in probe cover dispenser
- 20 disposable, latex-free probe covers
- Two 1.5V AAA batteries
- Instructions for use, backed by a 2-year warranty
Who Uses This
Ground EMS & Ambulance
Fast, non-invasive ear temperature during triage and transport when an oral reading is impractical.
Fire & First Response
Quick fever screening and vitals in the field and at the station, with covers that keep the unit ready.
Clinics & Urgent Care
One-second reads and 30-reading recall move patients through intake and documentation efficiently.
Hospital & Inpatient Units
Hygienic, latex-free covers support temperature rounds across shared patients on the unit.
Frequently Asked Questions
How accurate is the ADC Adtemp 424N tympanic thermometer?
How do I use the ear thermometer and change the probe cover?
What do the colors mean, and what reads as a fever?
Is this an authentic ADC product?
How fast does this ship?
How do I place an order, request a quote, or set up an account?
References
- Evaluating temperature is essential in the prehospital setting. JEMS. Accessed July 24, 2026. https://www.jems.com/patient-care/emergency-medical-care/evaluating-temperature-is-essential-in-the-prehospital-setting/
- Niven DJ, Gaudet JE, Laupland KB, Mrklas KJ, Roberts DJ, Stelfox HT. Accuracy of peripheral thermometers for estimating temperature: a systematic review and meta-analysis. Ann Intern Med. 2015;163(10):768-777. doi:10.7326/M15-1150
- Barnett BJ, Nunberg S, Tai J, et al. Oral and tympanic membrane temperatures are inaccurate to identify fever in emergency department adults. West J Emerg Med. 2011;12(4):505-511. doi:10.5811/westjem.2011.2.1963
Peer-reviewed citations located via PubMed. This information supports product education and does not replace your agency's protocols, medical direction, or the manufacturer's Instructions for Use.
Authorized ADC Distributor (USA). Genuine, factory-fresh product in original manufacturer packaging.
In-stock orders typically ship within one business day. For current lead times, expedited options, or bulk orders, contact us at CustomerService@pacificbiomedical.com or 844.436.3526.
Order the ADC Adtemp 424N
Genuine American Diagnostic Corporation product. Volume and agency pricing available.
844.436.3526
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ADC Adtemp 424N Tympanic Ear Thermometer, 1-Second IR (424N) ADC-424N |
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$54.99
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