Subscribe to Newsletter
Techniques & Tools Technology, Clinical, Sensors

Don't Sweat the Small Stuff

More than just a fashion choice, a new wearable sensor, developed by researchers at the Tokyo University of Science, Japan, can monitor sweat electrolytes using a heat-transfer-based textile (1).

“The proposed sensor can be transferred to fiber substrates, and thus can be incorporated into textiles such as T-shirts, wristbands, and insoles,” said corresponding author and Associate Professor Isao Shitanda in a press release (2).

Screen-printed ion sensors were fabricated using heat-transfer printing and polyester films. The innermost layers of the design comprise chloride selective and reference electrode membranes to minimize the risk of allergic reactions and irritations. The textile-based sensor also contains a cloth compartment making it lightweight, soft, and non-irritating when attached to the skin. This textile technology enables even and quick distribution of sweat between the electrodes, establishing and maintaining electrical contact.

The researchers reported a lower detection limit of 1 × 10-4.3 and noted good ion selectivity/stable responses independent of acidity and alkalinity alterations, especially in the pH of sweat.

On-body testing revealed that the sensor signals – transmitted in real time – can be indicative of dehydration. “Since chloride is the most abundant electrolyte in human sweat, measuring its concentration provides an excellent indicator of the body’s electrolyte balance and a useful tool for the diagnosis and prevention of heat stroke,” explained Shitanda (2).

Receive content, products, events as well as relevant industry updates from The Analytical Scientist and its sponsors.
Stay up to date with our other newsletters and sponsors information, tailored specifically to the fields you are interested in

When you click “Subscribe” we will email you a link, which you must click to verify the email address above and activate your subscription. If you do not receive this email, please contact us at [email protected].
If you wish to unsubscribe, you can update your preferences at any point.

  1. I Shiatanda et al., ACS Sens, 8,7 (2023). DOI: 10.1021/acssensors.3c01027.
  2. TUS (2023). Available at:
About the Author
Markella Loi

Associate Editor, The Analytical Scientist

Register to The Analytical Scientist

Register to access our FREE online portfolio, request the magazine in print and manage your preferences.

You will benefit from:
  • Unlimited access to ALL articles
  • News, interviews & opinions from leading industry experts
  • Receive print (and PDF) copies of The Analytical Scientist magazine