PerfectPrime TC41, 4-Channel K-Type Digital Thermometer Thermocouple Sensor -200~1372°C/2501°F, 20 x 4 Data Log Storage Function (No Pipe Clamp)

Easy to use value for money used for testing temperature on commercial tumble dryer

It does work, and the supplied thermocouples and leads are pefectly functional - the device is easy to set up to log and display. However, the sampling rate for each of the probes is *very* slow. It might be perfectly fine for keeping tabs on the temperature of a room, fridge, freezer or oven once up to temperature, but thermocouples are designed to be used in places which can have a very dynamic change of temperature. And if that's what you want to do - e.g. you're looking for a reading (say) 10 times a second - look elsewhere. Shame really - because otherwise it seems well made and relatively robust - and but for a small software change to the device it could be *really* good.

It reads temperature! Unbelievable! Anyway, seems well made, the display is large and well readable.

Stock probs are horrible ...

Funktioniert einwandfrei, die Bedienung ist selbst erklärend (sollte sie aber auch sein, da keine Anleitung mitgeliefert wird). Min/Max- sowie Durchschnittfunktion arbeiten jeweils pro Kanal. Sehr gut ablesbares Display. Abweichung der Messwerte untereinander bei 0,1°C. Besser geht es gar nicht. Ich wüsste nicht, warum man ein teureres Gerät kaufen sollte.

La précision des mesures est tout a fait acceptable pour mes applications (environ 1% pour l'appareil que j'ai reçu). La qualité de fabrication est correcte, sans plus, mais tout à fait en rapport avec un appareil à ce prix. Les 4 canaux sont un plus indéniable et les capteurs de type K livrés avec l'appareil permettent une mise en œuvre rapide pour se faire la main (prévoir tout de même des capteurs plus robustes pour une application réelle).

Good product, react as advertised, good precision. Bad reviews here (concerning BIG errors in measuring temperature), are made by guys that do not pay attention connecting sensors (including me, for a while (: ). There is a "+" and a "-" written on the sensor connector and on the device. After correctly connected and testing temperature (by putting all sensors in a plastic bag, near one to another) all had same indication (17.3C), two of them stable and two of them slowly changing indication from 17.2 to 17.3C and back. Changing the connection port of the 2 "unstabled" sensors did not affect the indication, but the position in the plastic bag did. As a result, I concluded the there is a VERY GOOD calibration from factory, the sensors are (at least at delivery time) ABSOLUTELY THE SAME, interchangeable. Be careful not to modify connector temperatures (by hand by example) as this will generate erroneous signals, and be displayed by the device. If needed to be used at another (very different) ambient temperature than 20C (or 21C - I don't remember), it may be possible to re-calibrate the device, as per instructions (for exemple to be used outside at -15C or at +40C). At such distant temperatures, the connectors (the contact between device and sensor wires) will generate enough erroneous TEM voltage to fail your precision of the measurement. Also, as per manufacturer recommendations, let device 30 minutes in the ambient BEFORE measuring, to minimise the gradient of temperatures inside the device. Another observation is that in the first 5-10 seconds after power-up there is a different indication (few 0.1C) more then displayed later, when it became stable. I suppose stable temperature is good, as this is how the calibration was done. (as self-explained, it may be a "mini-heating" of the probe by the measurement itself or by powering-on - this is documented and normal for measuring with thermoresistance - but somehow applied to thermocouples).

Buone finiture. Parti in gomma ai lati che agevolano la presa. Preciso nella misurazione della temperatura. Molto comodo e rapido nelle misurazioni

他の温度計と比較しましたが、高価なものと対抗できるほどのものでした。 ありがとうございます。