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Extech 407740 3 range, Big Digit Sound Level Meter
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Extech 407740
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Features:
- High accuracy to ±1.5 dB
- Read both A and C frequency weightings, meets IEC 651 and ANSI Type 2 standards
- 3 measuring ranges for greater accuracy
- Low (30 to 80dB), Medium (50 to 100dB), High (80 to 130dB)
- Large 0.7" 3-1/2 digit LCD, 0.1dB resolution
- Max Hold function stores highest reading
- Fast (200ms) or slow (500ms) response time
- Utilizes 0.52" (13.2)mm condenser microphone
- AC and DC (10mV/dB) outputs are standard through a phone output terminal for connection to an analyzer or recorder plus tripod mount
- Complete with 9V battery and carrying case
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Description
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This device measures sound in decibels (dB). Useful features include A/C Weighting, Fast/Slow Response Time, and Maximum Reading HOLD. Careful use of this meter will provide years of reliable service.
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Models, Options, & Accessories
| Model |
Description |
List Price |
Sale Price |
| 407740 |
SOUND LEVEL METER, DIGITAL, 1.5DB ACCURACY |
| $249.99 |  |
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| 407740-NIST |
SOUND LEVEL METER W/NIST 407740 |
| $374.99 | |
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| Model |
Accessories |
List Price |
Sale Price |
| 407744 |
SOUND LEVEL CALIBRATOR |
| $299.99 | |
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Specifications
| General Specifications |
| Display |
2000 count multi-function LCD |
| Input Signal Range |
‘A’ Weighting: 30 to 130dB ‘C’ Weighting: 30 to 130dB |
| Response Time |
Fast: Response = 125ms; Slow: Response = 1s |
| Resolution |
0.1 dB |
| Standards Compliance |
ANSI and IEC Type 2 |
| Accuracy (at 23° ± 5°C) |
±1.5dB at 1KHz (94dB) |
| Frequency |
31.5 to 8,000Hz |
| Microphone |
Electric condenser microphone, 0.5" (12.7mm) |
| Range Selector Switch |
30 to 80dB, 50 to 100dB, 80 to 130dB |
| External Calibrator |
Use Extech model 407744 |
| Analog Output Signal AC |
0.5Vrms (full scale of selected range) |
| DC |
0.3 to 1.3VDC, 10mV/dB |
| Analog output impedance |
600 ohms |
| Analog Output Terminal |
3.5mm phone jack |
| Operating Temperature |
32 °F to 122 °F (0 °C to 50 °C) |
| Operating Humidity |
Max. 90% RH (0° to 35°C) |
| Power Supply |
9V battery |
| Dimensions / Weight |
10 x 2.8 x 1.1” (255 x 70 x 28mm) / 10 oz. (280 g) |
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