Warner Instruments, A Harvard Apparatus Company
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Warner Insruments LLC
1125 Dixwell Avenue, Hamden, CT 06514, USA
Toll Free: 800.599.4203 | Phone: 203.776.0664
Fax: 203.776.1278
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Featured Product

HiZ-223 Dual Channel Differential Electrometer



The HiZ-223 is a very high input impedance, dual channel electrometer designed for measurements with high resistance ion-selective microelectrodes. The amplifier features two small active headstages, allowing the first stage of amplification to take place at the electrode site. Shunt capacity is reduced and electrical interference, such as electrostatic noise and motion artifact common to this type of recording, are greatly minimized.


  • 1015O Input Resistance
  • Designed for measurements with ion-selective microelectrodes
  • Probe Test Port
  • Standby mode protects input amplifiers
  • Driven Guard Shield reduces stray capacity and noise

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Welcome To Warner Instruments
Warner Instruments – designers and manufacturers of biomedical devices for the cellular, electrophysiological, and neurological sciences.
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Special Offers and Clearance Items

We're cleaning out the warehouse and we've found lots of discontinued, used, or surplus equipment.

We're making these items available (as we discover them) at deep discounts or below cost to move them out.

Click here to see our current offerings.


Online ordering is now available!


We welcome your comments and suggestions on how we may improve our website.

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