Extech 407750 Sound Level Meter
- Interface with a PC for analysis of test results
- Electret microphone provided
- LCD screen with refresh readings every half a second
Please note that the Extech 407750 does not come as standard with the cable/software needed to transmit and interact with data on PC. This software/cable is available as a separate purchase - please contact us directly by phone for any enquiries about this optional extra.
Extech's 407750 is a type 2 sound level meter that allows users to capture and transmit sound level data directly to PC.
Both auto and manual ranging depending on preference, the Extech 407750 can measure sound levels from 30dB up to 130dB with 6 different measurement ranges available to ensure the best possible readings at all times. Measurements are carried out with general resolution of 0.1dB and general accuracy of ±1.5dB @ 94dB for a 1kHz sine wave.
This unit features A and C selectable frequency ratings and it also possible to adjust the unit's response time between Fast and Slow. Accuracy can also maintained on this sound meter by utilising the unique background noise absorber mode, which will filter out ambient noise in order to ensure that the reading taken is correct.
The main screen included on this sound meter is large, LCD and comes with a backlight for using the tester in darkened conditions. The screen will display both a numerical results and analogue bargraph representation of the detected level of sound.
When testing it is also possible to connect this unit to PC via the use of an RS-232 interface. The unit does not contain built-in memory for storing data, but transfer between PC and Extech's compatible optional software is quick and easy.
This sound tester also includes a few extra features such as MIN/MAX, analogue output, tripod mounting and a MAX hold function.
Extech 407750 Sound Level Meter Key Features
- Auto and manual ranging
- 30 to 130dB range with 6 measurement ranges
- Meets ANSI and IEC type 2 standards
- Selectable frequency weighting: A and C
- Fast and slow selectable response time
- Background noise absorber filters out ambient noise to ensure measurement accuracy is maintained
- Large size LCD screen with backlight
- Analogue bargraph representation
- Electret condenser microphone (.24")
- MIN/MAX measurements
- Analogue output
- Tripod mountable
- MAX hold
- Interfaces with PC via RS-232 interface
- Ideal for machine noise evaluation, OSHA compliance testing, community noise measurements and noise ordinance
- Extech 407750 Sound Level Meter
- Batteries
- Carrying Case
| Digital Display | 3-1/2 digit (1999 count) Autorange LCD |
| Bargraph Display | 50dB display range (1dB resolution) |
| Measurement Range | 30 to 130dB (35 to 130dB for “C” weighting) |
| Resolution | 0.1dB |
| Accuracy | ±1.5 dB @ 94dB for a 1kHz sine wave |
| Microphone | Electret Condensor .24"(6mm dia.) type |
| Frequency Weighting | A and C |
| Time Response | Slow/Fast |
| Sampling Time | Updates every 0.5 seconds |
| Measurement Frequency Range | 31.5Hz to 8KHz |
| Analogue Output | AC: 0.707Vrms (full scale); DC: 10mVDC/dB |
| Applicable Standards | IEC 651 Type 2, ANSI S1.4 Type 2 |
| Power Supply | 9V battery , optional AC adaptor |
| Dimensions | 10 x 3.1 x 1.5"(256 x 80 x 38mm) |
| Weight | 8.5oz. (240g) |
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