Overview

Today, there is a need to know just how loud your surroundings really are. The CHECK MATES are inexpensive tools everybody should own. The CM-140 and CM-150 meet the same IEC 651 Type 2 standards of SPL meters that cost 5 times as much or more. Windscreen and battery are included with each of the CHECK MATE models. 

The CHECK MATE series SPL (Sound Pressure Level) meters, first introduced in early 2003, allow musicians, sound contractors, and others to measure SPL in decibels (dB). A decibel is defined as the unit for measuring relative loudness of a sound. We have expanded our line from one CHECK MATE SPL Meter to four products in the category. We have sold thousands of units to working musicians, DJs, police departments, sound contractors, racetracks, etc...

  • Mini Size 
  • Low Cost High Performance 
  • MAX/MIN Function 
  • Level Range Display 
  • AC Signal Output 
  • Resolution 0.1dB 
  • IEC 651 Type II, ANSI S1.4 Type II

Standard

IEC 651 Type 2, ANSI S1.4 Type 2

Microphone

1/2" Electret Condenser

Accuracy (under reference conditions 94dB @1kHz)

±1.5dB

Level Range

Lo: 32 - 80dB

Med: 50 - 100dB

Hi: 80 - 130dB

Frequency Range

31.5Hz to 8kHz

Frequency Weighting

A/C

Time Weighting

Fast, Slow

Auxiliary Outputs

AC Signal Output, 1 Vrms at FS (Full Scale)

(FS: Means the upper limit of each level range.)

Dynamic Range

50dB

Display

Liquid Crystal Display

Digital Display

Digits: 4

Resolution: 0.1dB

Update: 0.5 sec.

Alarm Function

Over, Under

Power Supplied By

One 9V battery (included), 006P or IEC 6F22 or NEDA 1604

Battery Life

Approximately 70 Hours (Alkaline)

Operation Temp.

0°C to 40°C (32°F to 104°F) (<80% R.H.)

Storage Temp.

-10°C to 60°C (14°F to 140°F) (<70% R.H.)

Dimensions

9.1" x 2.1" x 1.3" (232 x 54 x 34 mm) (HxWxD)

Weight (without batteries)

7.06 oz (200 g)

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  • CM140 Check Mate SPL Meter
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