Martindale SP75 Sound Level Meter

This compact sound level meter can be used one handed or it can be mounted on a tripod for measuring over large periods.

The Time Weighting can be set to slow (for normal use) or fast to check the average level of frequency noise.

Similarly the Frequency Weighting can be A or C with C suitable for low frequency noise. An AC/DC output allows capture of reading for late analysis (output is approx 10mV DC/dB).

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 - 130dB
• Measurement Rate : Once per second nominal
• Display : 3½ 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 : 55dB
• Maximum Hold Decay Time : <1dB/3 minute with reset switch
• Time Weighting : (S) Slow and (F) Fast according to IEC 651 Type 2
• Microphone : ½" electret (prepolarised) condenser
• Supply : Battery x 4 1.5V (AAA size) UM-4 RO3
• Dimensions : 217 x 44 x 40mm
• Weight : 168g approximately (including batteries)
• Includes : Windscreen, 4 batteries, tripod mounting screw-nut and protective carrying case