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Extech 407780A Sound Level Meter
Extech 407780A Sound Level Meter
The Extech 407780A Sound Level Meter is a versatile instrument designed for accurately measuring sound levels in various environments. Its wide measurement range, multiple frequency weightings, data logging capabilities, and robust features make it suitable for both professional and industrial applications.
The 407780A is an integrated sound level meter with USB connectivity. It measures Leq and SEL with settings for A and C frequency weighting. The meter features a built-in datalogger with a PC interface, capable of storing up to 32,000 records for easy data review. It also has a four-digit multifunction LCD with both a digital readout and an analog bar graph.
Extech 407780A Key Features
- 4-digit multifunction LCD with analog bargraph
- Precise linearity over wide range (100dB)
- Display modes: SPL, SPL MIN/MAX, SEL, and Leq
- Programmable integrating time
- A and C Frequency weighting
- Impulse/Fast/Slow response settings
- Datalogging function records up to 32,000 records
- Real time calendar/clock
Extech 407780A Specifications
| Feature | Specifications |
| Applicable Standards | IEC 61672-1, 60651 and 60804 Type 2, ANSI S1.4 Type 2 |
| Accuracy | ±1.5dB (ref 94dB@1KHz) |
| Resolution | 0.1dB |
| Digital Display | 4-digit LCD |
| Measurement Parameters | SPL, SPL MIN/MAX, SEL, and Leq |
| Measurement Range | 30dB to 130dB |
| Linearity Range | 100dB |
| Measurement Frequency Range | 31.5Hz to 8KHz |
| Frequency Weighting | A and C |
| Response | Impulse, Fast and Slow |
| Microphone | 1/2" Electret condenser microphone |
| Sampling Time | Updated every 0.5s |
| Bargraph | 4dB steps, 100dB range, 125ms update |
| Display Warning Function | |
| Overrange Indicator | Displayed at the upper limit |
| Underrange Indicator | Displayed at the lower limit |
| Analog AC/DC Output | 2Vrms (at full scale), 10mVDC/dB |
| Power Supply | Four 1.5V AA batteries, Optional AC adapter |
| Battery Life | Approximately 24 hours |
| Dimensions | 10.4 x 2.8 x 0.8 inches (265 x 72 x 21 mm) |
| Weight | 10.9 oz (310 g) |