SCIENTIFIC SECTOR CATALOGUE - Flipbook - Page 34
“Wet and dry” hygrometers
Mason’s hygrometers
Hygrometers
These instruments measure the amount of water vapour in
the atmosphere, on a percentage scale known as Relative
Humidity (%RH). The di昀昀erence between the “wet” and “dry”
bulb temperatures enables the %RH to be determined
through the use of tables or a calculator.
White polypropylene case with water
container and wick. Supplied complete
with calculator chart and instructions
to determine %RH. Replacement water
container pots and wick also available.
Range: -5 to +50°C&F
Dimensions: 310 x 77 x 32mm
Product number: 13/222/3
Replacement pot: 13/087/0
Whirling hygrometers
Whirling hygrometers, also known as sling psychrometers, employ the “wet” and “dry” bulb principal to determine
%RH. They are designed to be rotated, by hand, to provide adequate and consistent ventilation of the bulbs.
These hygrometers are 昀椀lled with a spirit 昀椀lling. Replacement re昀椀ll tubes are available for both models.
These instruments can be supplied with calibration certi昀椀cation on request.
Measurement for life.
Whirling hygrometer
This traditional model has a folding handle with
calculator chart and instructions to determine the
percentage relative humidity. It is supplied with
2pcs replacement wicks in a protective canvas
carry case.
Range: -5 to +50°C only
Dimensions: 82 x 232 x 30mm (handle closed)
Product number: 13/744/2
Replacement tubes: 13/044/2
Pack of 12 replacement wicks: 13/086/0
brannan.co.uk
34
sales@brannan.co.uk
Compact psychrometer
This instrument uses shorter tubes and
the design incorporates a slide rule type
calculator to determine the %RH.
The body of the instrument slides away
into the handle providing complete
protection when not in use.
The psychrometer is available in choice
of Celsius or Fahrenheit only scales.
Range: -5 to +50°C or 0 to 120°F
Dimensions: 210 x 36 x 16mm
Product number: 13/606/2 - °C only
Product number: 13/606/1 - °F only
Replacement tube: 13/605/2 (°C only)
Replacement tube: 13/605/1 (°F only)
