High precision professional thermometer

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Thermomètre professionnel haute précision

For choose your thermometer wisely professional, whether medical, food or industrial, it is necessary to take into account different parameters and in particular its precision. To measure temperature of a place, a meat or a patient with precision, it is necessary to understand how does a thermometer work And how do we define precision. This also varies from thermometer to thermometer; from the digital thermometer to the contactless via the probe thermometer, the precision captured and the calibration change. Us temperature taking experts guide you in discovering the high precision components of a professional thermometer.

What defines the accuracy of a professional thermometer?

When you are looking to acquire a professional thermometer, three elements allow you to obtain high precision: high precision components, calibration And the combination of these two elements. Each of these ways of doing things have their own operation and their advantages and disadvantages.

The high-precision components of the thermometer

First, it is essential to understand that the accuracy of a thermometer is the combination of two components; there sensor accuracy and the precision of the electronics which will analyze the signal of the sensor.

When you are looking for a thermometer with a precise sensor, you will tend to turn to a sensor with a PT100 temperature probe. These are the most common sensor types of platinum resistance thermometers. The term Pt refers to the fact that the temperature sensor is made of platinum, and 100 to the fact that the Ohmic value is 100 Ohms at 0°C.

The precision of these sensors is then divided into different “accuracy class”: a class B sensor will have an accuracy of +/-0.3°C at 0°C while a class 1/10B or 1/10 DIN sensor will have an accuracy of +/-0.03°C at 0°C .

As it concerns the precision of the electronics which will analyze the signal from the sensor, it is given directly by the manufacturer of the chosen professional thermometer. For example, this high precision thermometer PT100 is given for an accuracy of +/-0.2°C.

Finally add the sensor accuracy and the thermometer accuracy to find the overall accuracy. In our case with a 1/3B probe at +/-0.08°C at 0°C + this same thermometer at +/-0.2°C = 0.08+0.2 = +/-0.28°C overall precision.

Now that you understand everything 😜, know that the main advantages of high precision components are firstly in the fact that you do not need to calibrate the device, and that a simple addition of the tolerances is enough to know the precision of the thermometer. On the other hand, the precision achieved will not be very high and the inspection bodies will ask you for proof of this precision (obtained only by a calibration certificate attesting to the precision of the device).

Calibrating a thermometer

Go through calibration of the professional thermometer allows the use of probes and other standard thermometers. The calibration is measured according to the temperature at which the thermometer is used at a given time. This way you capture the temperature with real accuracy from the thermometer thanks to the probe.

💡 Let’s quickly illustrate our points 💡

If we use a standard class B temperature probe +/-0.3°C at 0°C and a precision thermometer +/-0.2°C, our overall result gives us an accuracy of +/-0.50°C (0.3+0.2 ). Calibrating the thermometer at 0°C will allow you to know the temperature actually displayed by the thermometer at this temperature. SO, the calibration certificate will indicate the information below: 

  • Calibration temperature: 0°C
  • Temperature measured by the standard: 0.02°C
  • Temperature displayed by the thermometer: 0.42°C
  • Tolerance: +/-0.05°C

With this information we know that when the thermometer displays 0.42°C the real temperature is 0.02°C with a margin of error of +/-0.05°C.

As they are standard thermometers and sensors, the primary advantage lies in the price, they are cheaper. However, the accuracy is only good on temperatures measured specifically for this calibration certificate. The greater the number of points tested, the better we know the precision over the temperature range, but the more points tested during a calibration, the more expensive the certificate.

High precision components & calibration

Whether you are a healthcare professional, researcher, industrialist or even chef, you must meet certain legal obligations which will require you to have a high-precision thermometer for your temperature measurements. Today there are a multitude of types of thermometers (infrared thermometer, hygrometer thermometer, thermometer thermocouple or even electronic and digital thermometer) which meet these obligations.

To get a high-precision professional thermometer, Thermometre.fr specialists therefore recommend that you invest in a thermometer which combines both high precision components as well as a multi-point calibration certificate.

Our best high-precision thermometers:

For more information on these professional thermometers, do not hesitate to send us your request via the contact form and we will come back to you in less than 24 hours!

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