The Keithley Model 213 Quad Voltage Source (QVS) is a convenient and cost-effective instrument for sourcing voltage. Each of four fully independent and stackable channels provides up to ±10V of bias at 10mA.
* Autoranging or programmable ±1V, ±5V, or ±10V ranges.
* 10mA output current per channel.
Product Specs: http:// /pdfs/Keithley_213.pdf