Mason's Hygrometer with Wet and Dry Bulb, Wall-Mounted Material_Muslin 5V tungsten-filament flash-lamp bulbs with

5V tungsten-filament flash-lamp bulbs with E10 MES screw bases

and iron rods at 150 by 3mm mounted along a hot-water tank

this 2mm-plug lead pairs a banana plug at one end with a crocodile clip at the other for fine-pitch experimental work

Adjustable locking hook positions items 110 mm from the support rod on this suspension clamp

Designed to grip slit plates rigidly in the beam path

Mason's Hygrometer with Wet and Dry Bulb, Wall-Mounted Material_Muslin 5V tungsten-filament flash-lamp bulbs withWall mounted Mason's hygrometer with two identical dual scale thermometers one dry and one kept wet via a water reservoir calculating relative humidity from their paired reading difference.