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Isostim Stimulator/Isolator rechargeable bundled with A362 Charger

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A320 Stimulator

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  • Easy-to-use
  • Dual tone audible alarm
  • Designed for Neuroscience & Muscle applications


Pulse interval and width are set with single-turn continuously variable controls from 5 ms to 5.5 s in three ranges. Pulse width is continuously variable from 50 µs to 550 ms in four ranges.

Modes of Operation

In FREE RUN, Isostim™ generates continuous square waves. In EXT GATE or EXT SYNC modes, externally applied pulses can generate trains or single events. Single pulses of finite duration can be produced using a push-button on the instrument’s front panel. EXT/DC mode converts Isostim to a passive stimulus isolator.

Dual Tone Audible Alarm

A tone sounds when an open circuit is detected or when system compliance is reached. A second tone, which sounds when a signal is applied to the input, can only be heard if the batteries have sufficient charge to operate the isolator. A violation light advises when pulse width exceeds the interval.

Current Delivery

Stimulus currents up to 10mA can be set on the front panel with a control knob and a two-position range switch. Output current is load-independent.


The rechargeable A320R is supplied with a nickel metal hydride battery stack which provides 10-12 hours of operation before recharge is required. The A362 Battery Charger is required with the A320R. A320RC includes both the A362R and the A362 battery charger.



Interval 5ms to 5.5s continuously variable in three ranges (0.18 to 200Hz)
Pulse width 50μs to 550ms continuously variable in four ranges



External sync

Accepts 1μs minimum pulses
External gate Accepts 1μs pulse to continuous
Ext. command voltage threshold 5V at 3mA min., 8.5V max.




DC, pulse from internal timing or externally generated pulse
Current ranges 0-1mA, 0-10mA
Load voltage excursion (compliance) 10 V nom., 150V max.
Output polarity Reversible, manual switch
Current rise time and delay 8μs, typical (1KΩ load)
Current fall time and delay 10μs, typical (1KΩ load)
Leakage resistance, output to ground 1012Ω
Optocoupler 2500V rated min. breakdown voltage



Dry Cell (Version D)

16 alkaline 9V batteries included
Rechargeable (Version R) 16 rechargeable NiMH 9V batteries incl
DIMENSIONS 8.5 x 3.5 x 4.9 in. (22 x 9 x 12 cm)
SHIPPING WEIGHT 4 lb. (1.8 kg)




Our Clients Include:

University College London
Imperial College
University of Cambridge
University of Oxford

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