The PES™ is used to render fish unconscious and insensible quickly,
without use of chemical anesthetics. The system is portable to
facilitate handling and tagging activities in the field, aboard boats
and ships, and aquaculture, hatchery, and other research settings.



The PES™ is a rugged, fully portable fish electrosedation system for use in field and culture settings.

The Portable Electroanesthesia System (PES™) is used to render fish
unconscious and insensible quickly, without use of chemical anesthetics.
The system is portable to facilitate handling and tagging activities in
the field, aboard boats and ships, and aquaculture, hatchery, and other
research settings.

Developed by Smith-Root, the patented PES™ is an effective tool for
achieving chemical-free sedation in multiple locations and situations by
the aquatic science community. Fish are quickly anesthetized, either
individually or in batches, and, since the PES™ uses no chemicals and
requires no withdrawal time, fish can be immediately released when
research-related procedures are completed.

The system consists of two primary components, the battery-operated
power conditioner and the exposure tank. The power conditioner provides
direct current (DC) or pulsed direct current (PDC). The system is
programmable, allowing the selection of the type of electric current
used, the level of application, a dose-timer, and delivery of the dose
in one or two stages.

Being a self-contained, rechargeable system, the PES™ can be used at
any field location accessible by foot, boat or vehicle including
hatchery raceways. User-selected settings determine the length of time
fish remain anesthetized, making this system versatile enough to use
with many different aquatic organisms over a range of water
conductivities. Built to last by a well-established electrofisher
manufacturer, customers can be assured the PES™ will provide
chemical-free anesthesia in diverse science settings over many years of
use.

• Specifically designed for use on warm and cool-water species
• Provides quick anesthesia
• No chemical treatment baths to be disposed
• Stock can be immediately released