Webster Instruments” HPM540 handheld hydraulic data logger is designed for portable diagnostic applications as well as for installation on hydraulic test benches. The data logger features USB connectivity and allows connection of up to four sensors, as well as monitoring or data logging direct to laptop any combination of flow, pressure, temperature, speed and analog inputs. A sampling rate of up to 0.25 ms makes the data logger a good fit for capturing pressure spikes. The device allows logging by time interval, on event or on user input. A rechargeable battery powered device, the data logger features ‘Sensor Recognition’ (SR), which automatically recognizes which SR series sensor is connected and automatically scales the input as well as engineering units. The data logger comes with a Windows-compatible HPMComm analysis software, USB cable and universal AC battery charger.