Description
The Humidity Measurement unit allows students to compare different methods of humidity measurement. It shows the differences in accuracy between instruments and their ease of use. It also includes a blower unit with a valve to show how air flow affects the different instruments. A square cross-section duct supports a blower unit. The duct contains a selection of instruments to measure humidity and temperature. A clear window in the duct allows students to see the instruments. A removeable outlet grill gives access to the instruments. A fan in the blower unit above the duct supplies a flow of air and a hand-operated valve varies the air flow rate. This allows students to study the effect of air flow on the instruments. An orifice plate and manometer measure the flow rate. An air filter in the air flow path stops dirt or other particles affecting the instruments. The instruments include a whirling hygrometer that students use near the outlet of the duct, providing an extra method of measuring temperature and humidity. The back of the duct includes an extra port. It allows students to introduce low-pressure steam into the duct, to increase the range of experiments (steam generator not included).
Learning Outcomes
- Measurement of air flow rate in a duct
- Measurement of relative humidity using different types of instrumentation
- Comparison of measurement methods for accuracy and ease of use
Features
- Shows how to measure and calculate the relative humidity (moisture content) of air
- Allows students to compare different humidity measuring instruments
- Includes air filter to help prevent dust and other impurities from entering instruments
- Includes mechanical and electronic instruments to measure temperature and humidity
- Variable flow rate fan to show the effect of air flow on humidity measurement
- Compact unit for ease of use and storage
Specifications
- ATICO is committed to a programme of continuous improvement; hence we reserve the right to alter the design and product specification without prior notice.
- Nett dimensions and weight:
- 1250 mm wide x 420 mm front to back x 600 mm high and 29 kg
- Packed dimensions and weight:
- 0.5 m3 and 35 kg
- Instrumentation and sensors:
- Hair hygrometer
- Wet and dry bulb hygrometer
- Whirling hygrometer
- Thin fi lm capacitive relative humidity sensor (complete with digital display)
- Thermistor temperature sensor (complete with digital display)
- Maximum air flow rate: 110 litres/second
Operating Conditions
- Operating Enviroment:
- Laboratory environment
- Storage Temprature Range :
- –25°C to +55°C (when packed for transport)
- Operating Temprature range:
- +5°C to +30°C
- Operating relative humidity range:
- 80% at temperatures < 31°C decreasing linearly to 50% at 40vC
