Wet & Dry Bulb Hygrometers – Marine Humidity Measurement for Shipboard Use

Maintaining proper humidity levels is critical aboard marine vessels—for crew comfort, cargo integrity, and corrosion control. This wet and dry bulb hygrometer, also known as a psychrometer, provides reliable relative humidity readings using the time-tested evaporation principle. Built for rugged shipboard conditions, it is the go-to instrument for marine engineers, deck officers, and surveyors.

The hygrometer consists of two identical mercury-free thermometers mounted together: one dry bulb thermometer and one wet bulb thermometer with a cotton wick and water reservoir. The difference in temperature between the two bulbs is used with the included conversion chart to determine relative humidity accurately. The large, dual-scale Celsius and Fahrenheit markings ensure easy reading even in low-light spaces.

Constructed from corrosion-resistant materials, this instrument is designed for long service life in salt-air environments. It can be wall-mounted in the engine control room, bridge, cargo hold, or living quarters. No batteries or electronics means it works consistently in the most demanding conditions. Ensure the protection of your vessel and cargo by monitoring humidity with this essential nautical instrument.