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. Item Number424N Read TimeAbout 1 second Range89.6 to 109.4 F Accuracy±0.4 F (±0.2 C) Memory30 readings, time-stamped Fever AlertRed LCD at/above 99.5 F 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?The 424N reads to a stated accuracy of plus or minus 0.4 F (0.2 C) and displays in about one second. Like all tympanic devices it estimates core temperature rather than measuring it directly, so a normal ear reading does not rule out fever. Correlate the result with the patient's clinical picture and your local protocol. How do I use the ear thermometer and change the probe cover?Place a fresh, disposable probe cover on the probe for every patient, position it in the ear canal as shown in the instructions, and press to read in about one second. The covers are latex-free and single-use, which helps reduce cross-contamination. Replacement covers are sold as item 424N-40 (40 count) and 424N-200 (200 count). What do the colors mean, and what reads as a fever?The backlit LCD is color-coded: it shows green for readings in the normal range and turns red at or above 99.5 F to flag a possible fever. You can switch the display between Fahrenheit and Celsius, and the unit stores the last 30 readings with a time stamp for charting. Is this an authentic ADC product?Yes. Pacific Biomedical supplies genuine, factory-fresh American Diagnostic Corporation products sourced through authorized channels, shipped in original manufacturer packaging. How fast does this ship?In-stock orders typically ship within one business day. For expedited shipping, current lead times, or bulk orders, contact us at CustomerService@pacificbiomedical.com or 844.436.3526. How do I place an order, request a quote, or set up an account?Add the item to your cart to order online, or contact us for volume pricing, GPO or contract pricing, agency purchase orders, and net terms. Reach us at CustomerService@pacificbiomedical.com or 844.436.3526. 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 CustomerService@pacificbiomedical.com