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Constant Current System

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The Constant Current System is a DC power source with a built-in current probe designed for use in electrochemistry experiments.


The Constant Current System eliminates the need for a separate power supply when performing electroplating and electrolysis experiments in chemistry. It is capable of delivering up to 0.6 A at 5 V DC.

A current-sensing resistor allows monitoring of the output current through the sensor cable. The user can set the current by tuning the dial with the system automatically adjusting the voltage.

Use the Constant Current System to explore Faraday’s law and determine Avogadro’s Number.

Note that it can only be used in conjunction with its own built-in power supply—it cannot be used to measure the current of a circuit using a different power supply.

Sample Data


  • Range: 0-0.6 A
  • Typical Resolution: 0.09 mA
  • Linearity: 0.1%
  • Supply voltage: 5 VDC
  • Current in amperes:
    • Slope: 0.145 A/V
    • Intercept: 0 A
Download the user manual for full specifications


The Constant Current System can be used instead of the Current Probe for several experiments from Advanced Chemistry with Vernier.

The following experiments include updated instructions for the Constant Current System:

Advanced Chemistry with Vernier

Compatibility Requirements

The Constant Current System may require a compatible interface and software. Choose a platform below to see compatible interface and software options.

What’s Included

  • Vernier Constant Current System
  • Power supply
  • User manual

The power supply included is the same as the LabQuest power supply.

Ordering Information

All prices are for U.S. educators.

NameOrder CodePriceQuantity
Constant Current SystemCCS-BTA$59
Optional Accessories
LabQuest Power SupplyLQ-PS$11


Related Products

Educational use only: Vernier products are designed for educational use. They are not appropriate for industrial, medical, or commercial applications. Product usage disclaimer »

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