SEASONAL CATALOGUE - AUTUMN 2024 EDITION - Flipbook - Page 9
Environmental monitoring - Weather watchers
Mason’s 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.
Autumn
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: 310mm x 77mm x 32mm
Product number: 13/222/3
Replacement pot: 13/087/0
Whirling hygrometer
Measurement for life.
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.
This traditional model has a folding
handle with calculator chart and instructions
to determine thepercentage relative humidity.
It is supplied with 2pcs replacement wicks in
a protective canvas carry case.
Range: -5 to +50°C only
Dimensions: 82mm x 232mm 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
sales@brannan.co.uk
9
