HP 4142B Modular DC Source / MonitorProduct Description The HP 4142B Modular DC Source Monitor is a tested and reliable product designed for multiple applications. Product Details 4142B (HP) Official style Product Overview A compact 24 sentence engineering oriented overview. Key Features Modular DC Source Monitor Reliable Performance Applications Test and Measurement Electronics Development Lab Research Things To Note Product Appearance: 80% 99% New. Functional Test: Normal. We have 5