Martindale SP75 Sound Level Meter

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This sound level meter SP75 from Martindale is a compact device that can be used one handed or, when measuring over long periods, it can be mounted on a tripod.

The time weighting can be set to slow for when normal use is required or fast to check the average level of frequency noise.

The frequency rating can be A or C. The C setting is suitable for low frequency noise.

The AC/DC output allows capture of reading for later analysis, output is approx 10mV DC dB.

This sound meter has been designed to give an analysis of noise levels at a low cost and is not for professional safety certification.

Martindale SP75 Sound Level Meter key features
• Light weight
• Includes tripod mounting screw
• 3½" digit liquid crystal display (LCD)
• 1/2" electret (prepolarized) condenser microphone

Martindale SP75 Sound Level Meter technical specification
• Applicable Standard: IEC 651-1979 Type 2, ANSI S1.4-1983 Type 2, JIS C 1502
• Measurement Range: Lo - range 35-90 dB, Hi - range 75-130 dB
• Display: Maximum reading of 1999.
• Resolution: 0.1dB
• Measurement rate: once per second, nominal
• Frequency Weighting: A and C according to IEC 651 Type 2
• Frequency Range: 31.5 Hz to 8000 Hz
• Detector: True-RMS with independent frequency weightings
• Dynamic Range: 55dB
• Maximum Hold decay time:<1dB/3minute with Reset switch
• Time Weighting: S(SLOW) and F(FAST) according to IEC 651, Type 2
• DC Output: Output - 10 mV/dB, Output Impedance - 50Ω approx
• AC Output: Output -1.0V RMS corresponding to the top of the selected measurement range.
• Output Impedance: 600Ω approx
• Warm-up: <5s
• Low battery indication: yes
• Operating Environment: -10°C to 50°C at < 90% relative humidity
• Storage Temperature: -20°C to 60°C, 0 to 80% R.H. with battery removed
• CE Mark: yes
• Battery: 4 pcs 1.5V (AAA size) UM-4 R03
• Battery Life: 50 hours
• Dimensions: 217mm(H) x 44mm(W) x 40mm(D)
• Weight: 168g including batteries

Martindale SP75 Sound Level Meter kit includes
• 1 x Windscreen
• 4 x Battery
• 1 x Plug
• 1 x Tripod mounting screw-nut
• 1 x Protective carrying case