The differences come down to range and application. The 124275 is calibrated tightly around clinical body-temperature range with ±0.1°C accuracy and an LCD showing Fahrenheit or Celsius — well suited to precise fever monitoring. The 124375 reads a wider 60°F to 110°F span, useful when you also need surface or ambient checks. The 124275S offers the same dependable digital dual-scale readout for routine screening, while the TAT-2000 (140001) is a straightforward handheld digital model that's easy to hand off between caregivers.

All are battery-powered and handheld, so they move easily from room to room. For reliable results, keep the sensor lens clean, scan the exposed forehead (not areas covered by hair or sweat), and swipe steadily to the hairline. Because the reading is taken over the skin rather than inside the body, cross-contamination risk is minimal — a real advantage in high-volume screening.

Exergen thermometers are trusted in more hospitals than any other brand, and the same technology carries over here for professional and family use alike. Explore related options in our Thermometers collection or browse the broader Patient Monitoring category to complete your assessment kit.