Vizsgáló- és mérőműszerek GYIK
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CO detector and CO2 meter: What is the difference?
A CO detector is a warning device for carbon monoxide (CO). Carbon monoxide is a dangerous respiratory poison that is produced by the incomplete combustion of fuels containing carbon. Causes can include technical defects as well as blocked exhaust pipes of gas heaters, oil heaters or stoves. CO detectors measure the gas concentration and sound the alarm as soon as it exceeds a critical value, because at high concentrations CO is lethal within a very short time. However, carbon monoxide cannot be seen, smelled or tasted. In an emergency, the devices can save lives. That is why it is advisable to fit CO detectors.
Unlike the CO detector, a CO2 meter is used to monitor the air quality in closed rooms. The concentration of carbon dioxide (CO2) is measured. Carbon dioxide is produced, for example, during respiration and is a natural component of the air. Concentrations that are too high can be eliminated by regular ventilation. Consumers can find out when this is necessary by using CO2 detectors, also known as CO2 traffic lights. The result of the measurement is indicated visually and an alarm signal sounds when a critical value is reached. The use of CO2 measuring devices is particularly recommended when many people are in closed rooms. Typical places of use are therefore offices, schools, seminar and conference rooms.
A többfunkciós detektoroknak milyen mély a behatolási mélysége?
Ez függ a fal vagy fedél anyagától és annak a fémrésznek a nagyságától, amelyet meg kell találni. Pontos adatokat ezért nem lehet megadni. Egy fémtárgyat pl. a levegőben kb. 50-80 mm távolságról fel lehet ismerni. Ez a távolság csökken az alkalmazott építőanyag függvényében. Végezzen próbamérést egy olyan helyen, ahol a keresendő mélységgel azonos, ismert mélységben van az alkatrész.
Hogyan keres fát a többfunkciós detektor?
A készülék bekapcsoláskor automatikusan kalibrálja magát ahhoz a talajhoz, amelyben a fát kell keresni. A detektor fal menti mozgatásával lehet az altalaj változását kutatni. Ez pl. az az eset, amikor egy fagerenda van a falban. Egy ilyen változást a detektor felismer. Annak kizárására, hogy ott ne fa, hanem fém legyen, ugyanazon a helyen egy összehasonlító mérést kell végezni egy fémkeresővel.
Which conclusions can be drawn from the percentages displayed on the humidity detecting apparatus and how precise are they?
The moisture meter detects the relative moisture content between the two metal pins on the surface of the object measured. When determining the total moisture content of, for example, a brick, it cannot be deduced for certain as only at the surface area has been measured. Therefore there could be a higher moisture and consequently a higher conductivity between the pins which could display a higher percentage. The percentage rate on the display screen can ascertain, for example, whether different parts of a wall yield different humidity levels, and thus can locate damp spots or potential leaks. The measurement accuracy of the detector is +/- 3%.