A temperature monitoring solution in a greenhouse
ith ‘measuring sensor solutions’ there are so many properties that can be measured that it makes sense to look
at the most common: Temperature, Pressure, Level, Flow, Humidity and Vibration.
Temperature can be measured with either contact probes or remotely with infrared detection. Contact probes typically use either thermocouples or resistance. Offering high accuracy and stability, these have a temperature range from -200˚C to +1800˚C but require contact with the medium being measured. Infrared sensors (Pyrometers) work by
detecting infrared radiation emitted by an object. While typical sensors have a temperature
range of -20˚C to +300˚C, more specialised sensors can measure up to 3000˚C. They have a fast response (75ms) and an accuracy of 1˚C or 2˚C. They are non-contact, can measure the temperature from up to 1m away, and can also be used to detect the presence or position of moving hot objects, such as food exiting an oven, or hot glue detection on a packing box.
Most industrial pressure sensors use a strain gauge, which has good accuracy and can have a wide variety of housing materials for different environments. As they can be affected by temperature, many have built-in temperature compensation. To achieve the best accuracy, pressure sensors
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