Your Temperature & Pressure Experts

FAQ page

What is the difference between a thermometer and a probe?
What is the difference between resolution and accuracy?
I see accessory required YES/NO on your product listings - what does this mean?
I've been told I need a thermometer - how do I know which type to get?
What is the difference between accuracy and system accuracy?
Do I need a calibration certificate?
I see that you manufacture temperature calibration sources. I have quite a few thermometers that need calibration certs regularly - would it be better to simply purchase one of these?
Can I send non-Eurolec thermometers for calibration and/or repair?
Which is better - a probe thermometer or an infrared thermometer?
I need a portable manometer but would prefer the scale not to be in mBar/BAR - can you help?
Can I use Eurolec manometers to measure e.g. barometric pressure or vacuum?

 


 

What is the difference between a thermometer and a probe?


The terms are often used interchangeably. Strictly speaking, a thermometer is the digital display part of the overall unit and the probe is the section that is inserted into the product or environment. The probe usually (but not always) has a handle with a metal shaft. The distinction between thermometer and probe is especially important when plug-in probes are priced and ordered separately to the thermometer unit e.g. the PC Temp T1. The distinction is less critical when the probe is not a plug-in type and is integral to the complete unit e.g. The PC Temp PT2 or Testo 106-T1.


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What is the difference between resolution and accuracy?


These two specifications are often confused. Resolution refers to the level of detail on the digital display of an instrument, e.g.  1°C resolution means the display changes by one full degree only. The accuracy specification specifies the greatest error from the actual value.

It is important therefore that the resolution is appropriate for the accuracy of the instrument. An instrument with an accuracy of ±0.5°C will require an instrument with a resolution of 0.1°C to be able to convey this accuracy.

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I see accessory required YES/NO on your product listings - what does this mean??


The accessory reference means that the particular product is not ready for use on its own and requires an additional item. For example, a PC Temp T1 thermometer will also need a probe or a Testo 175 T1 logger will also need software. The PC Temp PT2 has an integral probe so is ready for use, likewise the PR series of manometers do not require any other items and can be used as they are.

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I've been told I need a thermometer - how do I know which type to get?


The price and performance of your thermometer/probe is generally dictated by 2 things: range and accuracy. A thermometer with high accuracy (e.g. better than +/- 0.2C) and a wide range is likely to be more expensive. Talk to the sales team at Eurolec for advice on a thermometer suitable for your application. The good news is that thermometers featuring +/- 0.5C accuracy are available from Eurolec from €79.00.

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What is the difference between accuracy and system accuracy?


Put simply, system accuracy also includes the accuracy specification of the sensor or probe element of the unit. When discussing accuracy performance it can be important that this distinction is made especially when the probe is a plug-in type. E.g. a thermometer may have an accuracy of +/- 0.3C and a probe may have an accuracy of +/- 0.5C. Therefore, the system accuracy is +/- 0.8C. When discussing thermometers with integral, permanently attached probes, the accuracy figure expressed by Eurolec is always the system accuracy.

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Do I need a calibration certificate?


Unfortunately, there is no simple answer to this. Whether or not you need a calibration certificate is dictated by the guidelines/legislation of the industry you are working within. As a general rule, if you are working within the food industry or in laboratory type applications, it is highly likely that you will need a calibration certificate with your thermometer and that this will need to be renewed at least annually. On the other hand, if you are using your instrument as a rough check during a non-critical mechanical or industrial application, a calibration certificate may not be necessary. If you need a calibration certificate, please ensure that you mention this when discussing with Eurolec - some of our range are provided with a certificate as standard e.g. models PC Temp PT2 and Testo 106-T1.

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I see that you manufacture temperature calibration sources. I have quite a few thermometers that need calibration certs regularly - would it be better to simply purchase one of these?


It could well be a good idea. Depending on how many thermometers you regularly use and how often you need calibration certificates to be issued, it may be more economical in the long run to buy one of our CS temperature calibration units and issue your own certificates in-house. If for example you have, say, 15 or more thermometers/probes, you could find that the CS unit pays for itself very quickly. In addition, you will avoid the down time and inconvenience of arranging external calibration. Also, you can check the accuracy of your units as often as you like.

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Can I send non-Eurolec thermometers for calibration and/or repair?


Eurolec regularly issue calibration certificates for instruments from other manufacturers and our technicians are familiar with a wide range of brands and models. We cannot guarantee that we will always be able to carry out repairs on other models but usually we can do this also.

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Which is better - a probe thermometer or an infrared thermometer?


These are different types of instruments and both have their advantages and disadvantages. The main benefit of infrared thermometers is their speed of response - usually less than 2 or 3 seconds. In general, infrared thermometers are however less accurate than probe thermometers and it is important to understand that they are only suitable for surface measurements - they will not measure core temperatures and are also unsuitable for air temperature measurement. Some infrared thermometers (e.g. Testo 826-T2) have a laser sighting to help target the area of measurement - this does not affect performance or accuracy. Eurolec also supply combined probe and infrared thermometers (e.g. Testo 826-T4)

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I need a portable manometer but would prefer the scale not to be in mBar/BAR - can you help?


Not a problem. The default scale for most of our manometer range is mBar/BAR but both the PR Micro and Euro-Mano ranges offer the option of different scale selection. In addition, if the scale you would prefer is not represented we can probably still help by customising a manometer display to read in the scale of your choice - whatever that scale may be.

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Can I use Eurolec manometers to measure e.g. barometric pressure or vacuum?


Yes. The Eurolec portable manometer range is versatile and all the Eurolec units are suitable for a variety of pressure measurement applications. Some models ( e.g. PR Micro and Euro-Mano series) feature the option of different pressure scales. We also manufacture models specifically designed for absolute pressure: the PC Mano P5A and PR204A

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