![]() ![]() ![]() EASY-TO-USE INTERFACE: The Amprobe THWD-5 relative humidity, temperature Meter with dew point, wet bulb and flexible probe features a large digital dual display with a backlight built in. The THWD-5 is equipped with an extended probe for easy target access, a large dual LCD display, and is tripod mountable. Dry Bulb Temperature Resolution 0.1 Measurement Unit Relative Humidity ( RH) Ambient/Dry Bulb (C / F) Dew Point Temperature (C / F) Wet Bulb (C. MEASURES WET BULB AND DEW POINT: Easy and quick access to Wet bulb and Dew point values as well as Relative Humidity and Temperature. MICROPROCESSOR-BASED PSYCHROMETER: The THWD-5 psychrometer is a microprocessor-based psychrometer designed for HVAC and Plant Maintenance engineers and technicians. It is powered by four 1.5V AAA batteries (included), and includes a carrying bag, and instructions. The meter has minimum, maximum, and hold functions for recording data, a helpful function for preventive maintenance. The flexible probe can be extended to reach inside ducts and other hard to reach areas for easy target access, and a tripod mount stabilizes the meter for readings that take more time. The capacitive humidity sensor measures RH from 0 to 100 percent. It can simultaneously measure relative humidity, dew point, and wet-and dry-bulb temperature to provide dual-scale readings in ?F and ?C, and is used for HVAC, indoor air quality, and environmental applications. The Amprobe THWD-5 relative humidity (RH) and temperature microprocessor-based psychrometer is designed for HVAC and plant maintenance engineers and technicians. Data Hold to freeze last measurement reading.Minimum and Maximum measurements stored.Measure both relative humidity and temperature together The following tables calculate Dew Point and Relative Humidity based on the observed wet bulb and dry bulb temperatures and the elevation at the site of the.Temperature in ☌ or ☏, front panel selectable.Large digital dual display with backlight.Relative Humidity, Temperature, Dew Point and Wet Bulb.THWD-5 Relative Humidity and Temperature Meter with Wet Bulb and Dew Point.The temperature difference between the two thermometers is converted into a dew point temperature using a chart. The thermometers have to be ventilated by either whirling the instrument around or using a fan.Īfter a few minutes, the temperature of the wet-bulb stabilizes at a particular temperature. At any temperature there is a maximum amount of water vapor that the air can hold. The temperature of the wet-bulb thermometer drops according to the rate of evaporation, which depends on the dew point. Dew point is the temperature to which air must be cooled for water vapor in it to condense into dew or frost. A psychrometer consists of two thermometers, one of which has a wet wick around its bulb and is called the wet-bulb thermometer.Įvaporation of water off the wick removes heat from the thermometer. The reduction in the measured reflected light indicates the mirror is at the dew point temperature.Ī psychrometer is an alternative instrument for determining the dew point. The water droplets on the chilled mirror block light from reaching the detector, causing the reflected light beam to look less bright. When the mirror surface cools to the dew point temperature, dew forms on the mirror. Terms Used The amount of moisture air can hold is dependent on its temperature and pressure. The idea is that as water evaporates from the cloth, the temperature drops. This calculator shows the inter-relationship of air temperature and moisture content with dew point and wet-bulb temperature as measured by a psychrometric thermometer or sling psychrometer. The light beam is reflected off the mirror into the detector, which measures the brightness of the reflected light. Answer (1 of 9): What is the difference between wet bulb temperature and dew point temperature Wet bulb temperature measures the temperature with the bulb of the thermometer wrapped in wet cloth. One way to measure the dew point is based on the observation that a bathroom mirror will “fog up” when the temperature equals the dew point during a bath or shower.Ī dew point hygrometer consists of a small mirror, a narrow light beam and a light detector. ![]()
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