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

CM-140 SPECIFICATIONS

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)