Tachometer GM8905
Tachometer is one of the necessary instruments for machinery industry, which is used to detect rotate speed, linear velocity or frequency of motor. It can precisely measure rotate speed of impeller blade, expansion cylinder and spindle and can be widely used in motor, fan, washing machine, textile,
 automobile,airplane, ship and other industries.
Tachometer possesses the following features:
1.Hold the maximum value, minimum value,
 	average value and the last measured value.
 	2.Fully display operation instruction and unit
 	symbol, which is concise and explicit.
 	3.Wide measuring range and high resolution.
 	4.Battery low power indication, LCD backlight
 	display, and auto shutdown.
 	5.Adopt the latest microprocessor technology
 	and laser technology, which enables the
 	instrument to be more intelligent and reliable.
 	6.Oversized screen LCD display, with clear
 	indication.
 	7.Solid and delicated structure. The entire
 	machine adopts durable and optimized
 	electronic elements, and the shell adopts light
 	and solid ABS plastic, with beautiful appearance
 	and convenient use.
Specifications of Tachometer GM8905
| LCD display | 5-digit large screen LCD display, with word height of 18mm  |  			
| Unit | rpm | 
| Range | 2.5-99999rpm | 
| Resolution ratio  |  				0.1rpm(2.5~999.9rpm) 1rpm(1000~99999rpm)  |  			
| Basic precision  |  				 				 ±(0.1%n+5d)rpm;(2.5~999.9rpm) ±(1%n+5d)rpm;(1000~99999rpm)  |  			
| Laser power | CLASS 2 5mW | 
| Sampling ratio | Once/second | 
| Measurement distance  |  				50-500mm | 
| Time base | Quartz crystal | 
| Automatic shutdown  |  				The instrument will shut down after 60 seconds without any pressing.  |  			
| Operation environment  |  				0~50℃;32~122℉;10%~90%RH | 
| Storage environment  |  				-10~80℃;-14~176℉;10%~75%RH | 
| Power supply | 2x1.5V AAA battery | 
| Dimension | 55.7*29.9*127mm | 
| Weight | 106g | 
| Equipped with 3 bars of silver reflection tag (200mm*12mm) | |

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