Wet Bulb Lab Wick, Cotton, 6 Sizes (1/16–1/2 in), Bulk Spools (125–500 yd), Hygrometer Wicks, Scientific Instruments, Oil Lamps

Precision manufactured treated cotton tubular wet bulb wick for hatchery and HVAC industries. Features finely braided construction using 100% cotton yarns and designed to slide over thermometer bulbs or probes. Used for determining aqueous vapor in atmosphere with sling psychrometric and thermocouple applications. As of 1/9/2025, 1/4" size may have 2-3 week shipping delay.

Precision treated cotton tubular wet bulb wick in six internal diameters, sized to slide over a thermometer bulb or probe.

• Equip a sling psychrometer to measure relative humidity in atmospheric studies.
• Cover a thermocouple probe for aqueous vapor sensing.
• Maintain wet bulb instrumentation inside a poultry hatchery.
• Run an HVAC commissioning test using a calibrated wet bulb reading.

We started as a shoelace factory in Pepperell, Massachusetts, in 1917. More than a century later, that same commitment to quality manufacturing is woven into every product we make. From cord and wicking to beads and craft kits, we provide the materials and inspiration that help makers turn ideas into something they can proudly say, 'I made this.' Built on tradition, designed for modern creativity. Read the full story →