Our radiometer is made from a glass bulb from which much of the air has been removed. Inside the bulb, on a low-friction spindle, is a rotor with 4 vanes. Each vane has one blackened side and one silvered side; one black vane features a white dot in order to count rotations easily. When exposed to sunlight or artificial light, the vanes turn with no apparent motive power. This effect is due to differential heating of the black and silvered vanes.
Every order received by Westlab before 12pm PST will be dispatched on the next business day.
Shipping Time Based on Delivery Location
British Columbia/local shipments deliver in 1-2 business days
Alberta shipments deliver in 2-3 business days
Prairies (SK & MB) shipments deliver in 3-4 business days
Ontario/Quebec shipments deliver in 4-5 business days
Maritimes (NL, PEI, NS & NB) shipments deliver in 5-7 business days
Territories (YT, NT & NU) shipments depend on shipping service & location
*Ask our team for more information about shipping up north
Every order received by Westlab before 12pm PST will be dispatched on the next business day.
Shipping Time Based on Delivery Location
British Columbia/local shipments deliver in 1-2 business days
Alberta shipments deliver in 2-3 business days
Prairies (SK & MB) shipments deliver in 3-4 business days
Ontario/Quebec shipments deliver in 4-5 business days
Maritimes (NL, PEI, NS & NB) shipments deliver in 5-7 business days
Territories (YT, NT & NU) shipments depend on shipping service & location
*Ask our team for more information about shipping up north