Constant Current System

Product image for Constant Current System
Figure for Constant Current System
Product in use image for Constant Current System

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.


  • Range: 0-0.6 A
  • Resolution: 0.09 mA
    (LabQuest 2, LabQuest, LabQuest Mini, Go!Link, LabPro)
  • 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

What’s Included

  • Vernier Constant Current System
  • Power supply
  • User manual

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

Sensor Requirements

The Constant Current System requires a compatible interface and software to collect data. Interface and software sold separately. Getting started with probeware »

Compatible Interfaces

The Constant Current System is compatible with these interfaces:

Software Requirements

You will need LabQuest App 1.5.2 or newer to use Constant Current System with the LabQuest interface. Download the free software update for LabQuest »

Ordering Information

All prices are for U.S. educators.

NameOrder CodePriceQuantity
Constant Current SystemCCS-BTA$59

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 »

Order Code CCS-BTA
U.S. Educator Price $59

Sample Data

Constant current provided while electroplating copper onto a key
Constant current provided while electroplating copper onto a key
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