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Gentle Temp 521

Night or day, the gentle way

3-in-1 Temperature Measurement

OMRON’s Gentle Temp 521 ear thermometer is a superfast, digital thermometer with a range of sophisticated features including a screen that lights up. This means that it can be seen clearly at nighttime, making it especially handy for mothers looking after young children.

Gentletemp521 night

Backlight - Enables discrete and effective temperature measurement even while your child sleeps

Gentletemp521 bottle

Three in One Temp - For the best all-round care: measures your child’s temperature, as well as the milk bottle and room temperature

Gentle Temp 521 Features

  • Fast 1 second Temperature Measurement

  • Probe Covers

The Gentle Temp 521 measures ear temperature, but can also be used to take surface temperatures, from a milk bottle or food dispenser for example, as well as giving readings for the room temperature.
After all, why use three thermometers when one can do everything?
• In ear temperature
• Surface temperature
• Room temperature

Track temperature changes over time

With a memory capable of recording up to 25 readings, it’s possible to track temperature changes over a period of time and monitor trends. Temperatures can be displayed on the large LCD display in either degrees centigrade or Fahrenheit.

What is fever?

Fever is a medical sign characterized by an increased body temperature above the normal range. Normal body temperature may change during any given day. It is usually highest in the evening. Fever is not considered medically significant until body temperature is above 38°C.
Fever is caused by the release of certain chemicals by the immune system, usually as a result of an infection or inflammation. Not every fever needs medical attention, but in young children, if the temperature continues to rise or if there are other worrying symptoms, a doctor should be consulted.

Read more about Fever


OMRON is an established name in temperature measurement, used in homes and hospitals alike. People choose an OMRON thermometer for its proven durability, reliability, ease-of-use and comfort. Buy now, order at our partners

  • Gentletemp 720 omron

    Gentle Temp 720

  • Eco-temp-smart

    Eco Temp Smart

  • Gentle-temp-520

    Gentle Temp 520


Gentle Temp 720

Gentletemp 720 omron

Contactless measurement

OMRON's contactless thermometer is a superfast, accurate infrared thermometer with specific features to keep your baby's temperature constantly under control, with the lowest possible fuss.

  • Measures forehead body temperature with no contact
  • Measures surface temperature, from a milk bottle or food dispenser for example,
  • With memory for 25 readings, it's possible to track temperature changes over a period of time and monitor trends.

Thanks to the backlit screen, readings can be seen clearly at nighttime, making it especially handy when measuring your baby's temperature at night.

Eco Temp Smart


The smartest way to measure fever

Our Eco Temp Smart is a neatly designed simple concept developed for use in various settings. All thermometers are water-resistant and have an exchangeable battery feature. The easy-to-use placement of the ON/OFF button and the simple sleek design reinfornces the recognition as high-quality OMRON thermometers.

Gentle Temp 520


Hi-Tech Thermometer for low fuss measurement

The Gentle Temp 520 ear thermometer uses the same highly accurate technology as the Gentle Temp 521 and includes some of its advanced features, including one-second measurement and a memory for up to nine readings to track temperature changes over a period of time and monitor trends. It also comes with 21 probe covers. Temperatures can be displayed on the large LCD display in either degrees Centigrade or Fahrenheit.

Frequently asked questions

  • Are probe covers available for both the Ear and Pencil type thermometers?

    Yes, please contact your nearest OMRON retailer to order the Probe Cover for the Gentle Temp Ear Thermometer or the universal one that fits all Pencil type thermometers.

  • How accurate are thermometer measurements?

    Essentially a distinction must be made between the technical accuracy of the thermometer itself and the clinical accuracy in use in taking a temperature. The former is determined under idealised conditions to guarantee the quality of the instrument, taking the relevant technical standards into account. An accuracy of +/- 0.1°C can be considered state of the art for high-grade thermometers. The user must not confuse technical accuracy with the accuracy in use. Inaccuracy in human body temperature measurements, which depend on the measurement location and time, are due to physiological causes and are not due to a thermometer malfunction. By correctly applying a thermometer, the accuracy can be significantly increased (follow the Instruction Manual).

  • How do I keep the probe ‘lens’ on the Gentle Temp Ear Thermometer clean and free of scratches?

    A new probe cover must be used for each measurement in order to ensure accurate results. Never use the thermometer without a probe cover as this can cause the lens to become dirty and potentially impact the accuracy of the temperature measurement. The Probe Cover is critical to ensure fingerprints, ear wax or dirt will not contaminate the probe and impede upon the accuracy of the thermometer. If the probe lens becomes dirty it may be gently cleaned with a soft cotton cloth moistened with alcohol. Do NOT use a paper towel. The fibers in the paper towel may scratch the probe lens. Allow forty- five (45) minutes for the probe lens to dry completely before attaching the Probe Cover. Always return the thermometer to its protective case when not in use.

  • What is important when taking temperature?

    Essentially, it is true that the measured body temperature always depends on where it is measured. Therefore, contrary to popular consensus, there is no simple "normal temperature. Furthermore, a healthy person's body temperature will vary with activity and time of day. In a rectal temperature measurement, a typical temperature difference of 0.5°C between the higher evening temperatures is physiological. Body temperature is typically elevated after physical activity.
    Roughly speaking, a distinction is made between a core temperature and a surface, where the surface temperature is measured at the skin surface and is a mixed temperature between the body's core temperature and the ambient temperature. The core temperature is measured by inserting a thermometer into a body cavity, which yields the temperature of the mucous tissue.

  • What is infection?

    The body is made up of many systems that work together to provide health, wellness and daily function. When one of these systems is not working together with the others, diseases or a state of illness occurs. The immune system is the “watchdog” of the body. It protects the body from substances that do not belong there. These foreign substances can be bacteria, viruses, or tissue from another person or living thing. An infection occurs when one of these foreign substances has gained entry into someone’s body. A portion of the brain called the hypothalamus directs several different activities when something biochemical or physiologically abnormal is noted. The hypothalamus releases chemicals that increase the body temperature in the presence of infections. We know this process to be called a fever. Other signs of infection can include pain, swelling, heat, redness, abnormal liquid secretions dependent on the type of invading organism and the body part involved. Although the immune system is the body’s “watchdog” against infection, contact your healthcare professional at the first signs of infection.

  • Where should I take the temperature?

    The most reliable core temperature is obtained by inserting a thermometer into the rectum (rectal measurement). This measurement is accurate and has low possibility for errors in the results. The normal range is approximately: 36.2°C – 37.7°C.
    This is also a very reliable method of measuring core temperature. In this case a thermometer capable of detecting the infrared heat given off by the ear drum (tympanic membrane) is used. This measurement is accurate and has low possibility for errors in the results. The normal range is approximately: 35.5°C - 37.5°C.

    The oral measurement can be performed as ‘in the cheek’ measurement (called buccal) or as a ‘under the tongue’ measurement (called sublingual). Both measurements underestimate the rectal temperature by approximately 0.3° C – 0.8° C, with the ‘under the tongue’ measurement being preferable to ‘in the cheek’.

    Body surface temperature measurements used in clinical practice are in the arm pit (axillary measurement) and in the groin. In both cases the respective limb is pressed against the body in order to reduce any ambient temperature influence. However, this is successful only to a limited extent with the disadvantage that the measurement time is long. In adults, the axillary measurement is lower than the rectal by as much as 0.5°C – 1.5°C! In infants, these differences, in comparison with the rectal temperature, are much smaller.

  • Why measure body temperature?

    It is of great medical importance to measure body temperature. The reason is that a number of diseases are accompanied by characteristic changes in body temperature. Likewise, the course of certain diseases can be monitored by measuring body temperature, and the efficiency of a treatment initiated can be evaluated by the physician. Fever is a reaction to disease-specific stimuli, where the set point of the temperature control centre is varied to promote the body's defences against the disease process. Fever is the most common form of pathological (disease- related) elevation on body temperature.

  • Why take temperature readings from the ear?

    The OMRON Gentle Temp Thermometer is less threatening to a child than a rectal thermometer. It’s faster, safer and easier to use than an oral thermometer. Measurements can even be taken while a child is sleeping. For adults, the OMRON Gentle Temp Thermometer offers fast convenient, accurate readings without the wait of a conventional thermometer.

Didn’t find the answer you were looking for? Contact us via the email: omronhealthcare@htherapy.co.za