The instrument always used in conjunction with a salinometer is a __________.
• Salinometer purpose: measuring the salt content (salinity) of a liquid, often boiler water or seawater • How temperature affects readings of many liquid-property instruments • Differences between humidity, density/specific gravity, temperature, and high-temperature measurements
• What physical property does a salinometer actually read or compare in a liquid, and what other condition must be known accurately for that reading to be meaningful? • Look at each option and ask: which instrument is commonly paired with salinity measuring devices in practice, especially when dealing with boiler or evaporator systems? • Which of these instruments is about air properties, which about very high temperatures, and which are typically used with liquids?
• Identify which option measures air humidity versus liquid properties versus temperature. • Consider which choice is routinely mounted or supplied together with salinometers on boiler feedwater or evaporator systems. • Remember that many salinity and density instruments require a known temperature to give a correct reading—verify which option provides that.
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