Precision Memory Sound Level Meter IEC 61672 class 1.

The SL-4033SD Precision Memory Sound Level Meter offers both auto and manual range selection and a measurement range of 30 to 130 dB. Its high resolution and multifunction design make it suitable for various environmental noise measurements. FEATURES Frequency and time weighting meet IEC 61672 class 1. A & C weighting networks comply with standards. 0.5" standard microphone head. Time weighting (Fast & Slow) dynamic characteristic modes. Build External calibration VR. Auto range & Manual range selection. Available for external calibration adjustment. Condenser microphone for high accuracy & long-term stability. Memory function to store the Max. & Min. value. Hold and Peak Hold functions. This is a real-time SD memory card datalogger with a Built-in Clock and Calendar, a real-time data recorder, and a sampling time set from 1 second to 3600 seconds. A manual datalogger is available ( set the sampling time to 0 ). When the manual datalogger function is executed, it can set a different position ( location ) Number ( position 1 to position 99 ). Innovation and easy operation: The computer does not need to set up extra software. After executing the datalogger, just remove the SD card from the meter and plug it into the computer. It can then download all the measured values with the time information ( year/month/date/ hour/minute/second ) to Excel directly, and then the user can make further data or graphic analysis by themselves. SD card capacity: 1 GB to 16 GB. LCD with green light backlight, easy reading. It can default to auto power off or manual power off. Data hold, record max., and min. Reading. Microcomputer circuit, high accuracy. Power by UM3/AA ( 1.5 V ) x 6 batteries or DC 9V adapter. RS232/USB PC COMPUTER interface. Heavy duty & compact housing case.