Ventilating a flat when you cannot fit a vent
Without a permanent opening you have scheduled purge ventilation rather than continuous ventilation, and a carbon dioxide decay measurement is how you find out whether yours is working.
Read Article→Learning Center
Plain-language explanations of the measurements, sensors and numbers behind environmental monitoring.
Voltmeter and multimeter: the difference, and the one that catches people out
A voltmeter is a function and a multimeter is an instrument containing it, and the specification that separates them in practice is input impedance.
Read Article→Is a hygrometer worth having? What the reading is and is not good for
A hygrometer earns its place through the record it keeps rather than the number it shows, because a three percent tolerance cannot settle a close call.
Read Article→RIDGID or Milwaukee inspection camera: what the brand does not tell you
Both brands put the words inspection camera on visual probes and on thermal imagers, so the specification that matters depends entirely on which of the two you mean.
Read Article→Milwaukee inspection camera vs borescope: why that is not a comparison
A Milwaukee inspection camera is a borescope, so the useful comparison is between probe diameter, working length, articulation and recording, not between a brand and a category.
Read Article→Hygrometer or sling psychrometer: which humidity reading can you trust?
A hygrometer reads humidity directly and can drift; a sling psychrometer reads two temperatures and makes you derive humidity, which is why it works as a reference.
Read Article→Thermo hygrometer vs data logger: a live number against a defensible record
A thermo hygrometer shows the conditions now. A data logger records them at a chosen interval so the history can be exported, analysed and shown to somebody else.
Read Article→Hygrometer or hydrometer: two words apart, two completely unrelated instruments
A hygrometer measures water vapour in air. A hydrometer measures the density of a liquid by how deep it floats. The names differ by one letter and the instruments share nothing.
Read Article→Hygrometer vs weather station: one channel or a whole sensor array
A hygrometer is a single humidity channel, usually indoors. A weather station is an array of sensors with a console and a network connection, and its humidity channel is one line item among many.
Read Article→Hygrometer vs rain gauge: a ratio in the air against a depth on the ground
A hygrometer reports a percentage that cannot exceed one hundred. A rain gauge reports an accumulated depth that keeps climbing for as long as it rains, and the two numbers answer unrelated questions.
Read Article→Hygrometer vs anemometer: moisture in the air against movement of the air
A hygrometer reports how much water vapour the air holds. An anemometer reports how fast the air is travelling. Drying, comfort and ventilation all depend on both numbers at the same time.
Read Article→Hygrometer vs dial thermometer: why a needle on a dial says nothing about damp
A dial thermometer reports temperature from a bimetallic coil and nothing else. A hygrometer reports relative humidity, which only has meaning when the temperature is known as well.
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