Specialized Tools for Electrophysiology and Cell Biology Research

(SIU-202) Monopolar Isolated Stimulator

Product Summary

  • Constant current in 3 ranges up to 10mA
  • 100 volt compliance with LED indicator
  • Optical coupling isolates stimulator from pulse source
  • Battery powered for low noise recording applications
  • Compatible with electrophysiological applications
  • Variable compliance voltage feature

The SIU-202 is ideal for providing stimulation when stimulus artifacts must be kept to a minimum, such as in nerve or muscle research.

This instrument features optical isolation at the input and a battery powered constant current delivery circuit. Timing pulses can be controlled by any device capable of generating a TTL level positive pulse (eg, a computer with data acquisition).

On the instrument rear panel are two TTL inputs; one comprising a standard BNC, the other using an optional fiber-optic converter box. The fiber-optic eliminates all ground connections to the SIU-202.

Monopolar Isolated Stimulator


The SIU-202 output amplitude is set via a range-mode switch, used in conjunction with a ten-turn potentiometer to select what percentage of the chosen range is applied.

The constant current output has 100 V compliance with an LED over-voltage indicator. The compliance voltage may also be set to a lower value by simply reducing the number of 9 volt batteries installed within the instrument. A low battery light provides advanced notice of battery status, and ultra low power electronics provide up to 250 hours of operation for the 2 mA output setting.

An optional CC-102 cable is available for making contact with your stimulation chamber's electrodes.


(CC-102 Cable)
Output Waveform Current Pulse
Output Current Ranges 0.1, 1.0, and 10.0 mA
Output Compliance 100 V
Output Polarity Selected by Mode Switch
Amplitude Control Multi-turn dial
Input Pulse Requirements TTL level, positive pulse 3 volt, 1 mA minimum
Input Pulse Timing 100 ìs minimum pulse width
Input Connector BNC, optional fiber-optic
Input Isolation 5,300 volts rms
Isolation Resistance 1012 Ω
Output Connector 5-way binding posts (Banana Jacks)
Power Requirements 16 - 9 volt alkaline batteries
Physical Size, H x W x D 4.5 x 15.9 x 27.9 cm
Shipping Weight 3 kg
Warranty One year, parts and labor

Customers from Europe and Australia can use the Multi Channel Systems - Online Shop to order Warner products or create quotes.

Order No. Model No. Product Description USA Price Order
64-1933 SIU-202 Monopolar stimulator, constant current, isolated Login Login
64-1425 CC-102 Cable, BNC + male banana to 1 mm jack (for use with field stimulation chambers) Login Login
64-1934 SIU-202FOC Fiber-Optic Converter Login Login

Need support?

Want to know more about our quality products or need assistance in technical support?