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Today, there is a need to know just how loud your surroundings really are. The CHECK MATES decibel meters are inexpensive tools everybody should...

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Today, there is a need to know just how loud your surroundings really are. The CHECK MATES decibel meters are inexpensive tools everybody should own. The Galaxy Audio CM-140 and Galaxy Audio CM-170 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 the Galaxy Audio CM-140 and all other 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


Check Mate CM-130 and CM-140 windscreen


Standard tripod connector with single lock pan head. The tripod extends to 5 height positions from 11" to 3' 8". 

Tripod carrying case included.


Over time, all SPL meters lose their calibration. The Galaxy Audio CM-C200 is a sound pressure level (SPL) meter calibrator. The CM-C200 meets IEC 60942 2003 Class 2 and ANSI S1.40-1984 standards. The CM-C200 can calibrate 1", 1/2" and 1/4" microphone capsules at 94dB and 114dB.  

The calibrator is designed to calibrate SPL Meters with a microphone diameter of 1/4", 1/2" and 1". The CM-C200 will work with any of the CheckMate SPL Meters and many other brands. The CM-C200 has a test tone at 1kHz at both 94dB and 114dB. The CM-C200 includes 2 adaptors a protective zipper pouch and manual.

  • Accurate and simple to use
  • Calibration levels of 94dB and 114dB at 1kHz
  • Fits 1", 1/2" and 1/4" diameter microphones
  • Conforms to IEC 60942 2003 Class 2 and ANSI S1.40-1984 
  • Weight: approx 0.41lbs (186.4g) (including battery)

CM-140 Specifications

StandardIEC 651 Type 2, ANSI S1.4 Type 2
Microphone1/2" Electret Condenser
Accuracy (under reference conditions 94dB @1kHz)±1.5dB
Level RangeLo: 32 - 80dB
Med: 50 - 100dB
Hi: 80 - 130dB
Frequency Range31.5Hz to 8kHz
Frequency WeightingA/C
Time WeightingFast, Slow
Auxiliary OutputsAC Signal Output, 1 Vrms at FS (Full Scale)
(FS: Means the upper limit of each level range.)
Dynamic Range50dB
DisplayLiquid Crystal Display
Digital DisplayDigits: 4
Resolution: 0.1dB
Update: 0.5 sec.
Alarm FunctionOver, Under
Power Supplied ByOne 9V battery (included), 006P or IEC 6F22 or NEDA 1604
Battery LifeApproximately 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.)
Dimensions9.1" x 2.1" x 1.3" (232 x 54 x 34 mm) (HxWxD)
Weight (without batteries)7.06 oz (200 g)


Manual ( pdf - 0.39 MB )
Cut Sheet ( pdf - 2.24 MB )

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