The Martindale SP75 is a basic sound level meter, measuring from 35 - 130dB, and is ideal for fire alarm installers and general purpose use. This compact meter is suitable for mounting onto a tripod for measuring over long periods.

The Time Weighting can be set to Slow, for normal use, or Fast, for checking the average level of frequency noise. Similarly, the Frequency Weighting can be set to A or C, suitable for low frequency noise. An AC / DC output allows capture of readings for later analysis (output is 10mV DC/dB approx).

The SP75 sound level meter is supplied with batteries, microphone windshield, tripod mounting screw, instruction manual & case.

Applicable Standard

IEC 651 Type 2, ANSI S1.4 type 2, JIS C 1502

Measurement Range

Lo: 35 - 90dB

Hi: 75 - 130dB

Measurement Rate

Once per second

Display

3 1/2 digit LCD

Resolution

0.1 dB

Frequency Weighting

A and C

Frequency Range

31.5Hz - 8000Hz

Detector

True-RMS with independent frequency weightings

Dynamic Range

55 dB

Maximum Hold Decay Time

<1dB / 3 minute with reset switch

Time Weighting

Slow & Fast according to IEC 651 Type 2

Microphone

1/2" electret (prepolarised) condenser

General Specifications

Power Supply: 4 x 1.5V batteries (AAA Size)

Dimensions: 217 x 44 x 40mm

Supplied with windshield, 4 batteries, tripod mounting screw, carry case and instruction manual

Martindale SP75 Specification Sheet

Martindale SP75 Instruction Manual