Sound Pressure Meter TMSP 1 represents a simple and easy solution for measuring noise levels in a large variety of applications as it is equipped with four measurement scales and capable of operating in a wide temperature range. It's user-friendly interface with a backlight displaymakes this design fit for experts and novices alike. It uses the electret condenser microphone to pick up ambient noise and headset for data processing and analysis. It is capable of general sound level and low frequency noise measurements with dBA and dBC scale weightings in addition to fast and slow time weighting selection for both the normal and average level of fluctuating noise measurement. Standard equipment includes a carrying case with windshield, screwdriver for calibration, an alkaline battery and a jack for external output.