The versatile DPM4 tests and calibrates flow and pressure generators used in many medical devices. With several measurements combined in a single, handheld device, the DPM4 provides a cost-effective solution, eliminating the need for multiple test meters. The DPM4 features a menu-driven interface for simple operation and an easy-to-read screen that displays multiple parameter measurements simultaneously. Built-to-order, the palm-sized device comes in four models to meet the varied needs of biomedical engineers and technicians—the 1G, 1H, 2G, and 2H. All models measure differential pressure, vacuum, and temperature. Models 2G and 2H feature a built-in barometer and measure barometric pressure, flow, and humidity. The G and H models vary according to pressure measurement ranges. The 1G and 2G models measure pressure in the -700 mmHg to 5000 mmHg range, and the 1H and 2H models measure pressure in the -350 mmHg to 350 mmHg range. All the devices provide highly accurate test results.