Get replacement humidity wicks for your ESPEC chamber.

A wet-bulb wick is needed to run humidity tests. If there is one already in place, check whether it is
wet or dry before starting. If dry, change it.

To see a video of a wick installation (youtube) click here. 


  • Bacteria adhering to the wet-bulb wick can proliferate during tests and block water
    supply. Wash hands with soap and water before handling the wick.
  • Make sure the tail end of the wet-bulb wick is aligned with the tip of the wet-bulb temperature sensor. Humidity control can be destabilized if the sensor is overly exposed or it the sensor is out of position.
  • Lay the bottom of the wet-bulb wick in the trough of the wick pan.
  • Remove the wet-bulb wick for temperature-only tests, especially if running the chamber above room temperature. When the wick dries out from heating, it becomes harder for it to absorb water for the next humidity test.

To order and receive a quote, click on the part number. Be sure to include your serial number so we can confirm the right wicks for you.

Part # Picture Description For models with
Model# prefix
25210206 FW-1A (WG-101)
Benchtop chamber wicks, BT and SH series, all years (24/pkg)
BT, SH All
6ACK0003 FW-2E (WG-102)
Platinous A and G series (made in USA), standard humidity range (24/pkg)
PLA, PXA, PRA, EN, EW 1989-2005
6ACK0017 FW-3E (WG-103)
All chambers made in USA, 2005-2011, standard humidity range (24/pkg)
ES, EGN, EN, EW, ET 2005-2016
100281 FW-4H (WG-104)
Platinous H series, original wick arm design
EP 2011-2016
6ACK0022 FW-5 (WG-105)
All chambers made in USA with redesigned wick arm, starting 2016
EP, EW, EGN, EN 2016-present
Platinous, all series/years (made in USA), low humidity range (24/pkg)
PLA, PXA, PRA, EP, ESAll with low humidity system
100343HAST chamber wicks, all models/years (50/pkg)EHS, TPCAll

ESPEC also has 'shoestring' wick material for general use.

Get quick help from ESPEC's Support and Service teams

Price quotes include:
  • Pricing for unit, options, freight, and install/start-up
  • Current lead-time or stock status
  • Related documents: brochure, detailed specifications, drawing
  • Contact information for your local sales representative

Quotes are sent by the next business day for standard models shipping to North America. Complete all form fields to ensure a fast response.

Contacting ESPEC