The PM400 from Thorlabs is a Power and Energy Meter with projected Capacitive Touchscreen with Multi-Touch Technology, allowing data displays to be zoomed and scrolled with hand gestures. Capacitive touch buttons enables fast access to set the source wavelength or spectrum, a delta mode that shows the change in power from a user-selected set point, the zeroing function, and device main menu. The touchscreen is sensitive enough that it can be operated while wearing latex, nitrile, or cotton gloves. It has an internal 4 GB flash memory where measured data, calibration information, and attenuation curves can all be saved and could be modified, copied or saved externally by connecting the unit to a PC via the USB port.
The meter is compatible with over 30 power and energy sensors and can be connected to compatible third-party and custom sensors via either the female DB9 connector or the 14-pin auxiliary input. A 3.5 mm mono audio (2P) jack provides a 0 to 2 V analog signal that corresponds to the ratio of the measured value to the full scale value; a BNC adapter for this jack is included so that the output can be easily viewed using an oscilloscope or other device. It has up to 1000 hours of battery-powered operation between charging cycles and is compatible with TSP-TH temperature probe.