Additel ADT761ALLP [ADT761A-LLP-05-DP1] Automated Low / Differential Pressure Calibrator, 0.05% FS With DP30 and DP1 Sensors , -30 to 30 inH2O (-75 to 75 mbar) and -1 to 1 inH2O (-2.5 to 2.5 mbar). The Additel ADT761A-LLP-DP1 Automated Pressure Calibrator with DP30 and DP1 Sensors, -1 to 1 inH2O (-2.5 to 2.5 mbar) is completely self-contained and automated with a built-in pump for pressure generation and precision control technology. With removable internal pressure modules, increased speed to pressure, ability to read two external pressure modules, touch screen display, Wi-Fi, Bluetooth, and Ethernet communications, double the original battery life, and more - simply set the desired pressure and watch the calibrator do the work. The Additel ADT761A-LLP-DP1 is designed for low pressure calibration and comes with a ±30 inH2O (±75 mbar) high range module and a low range module, DP1  -1 to 1 inH2O (-2.5 to 2.5 mbar). This unit has an accuracy of 0.05%FS with control stability better than 0.005%FS. All measurements can be made in differential or gauge pressures.