Digital Gasoline Engine Tachometer SM8238 digital tachometers speed tester

Model:BND-SM8238

Inductive type measure the engine speed by noncontact
Measuring the temperature cooling water in engine by contact
Testing the rotate speed of multi-cylinder in same time,
or testing one of cylinder rotate speed 
Testing the rotate speed used to 2 stokes and 4 strokes
Can set the cylinder in 2, 3, 4, 5, 6, 8, 12 or set the impulse 
of each rotation
Memory the maximum value, minimum value and last value 
Can record 300 testing data
Low power symbol automatic indicating
Yellow-green back light
°C and °F Temperature switch function
Rotation Speed Range: 100~40,000RPM
Rotation Speed Resolution: 1RPM
Rotation Speed Accuracy: ±1r/min(100~11,999r/min)
±2r/min(12,000~19,999r/min)
±4r/min(20,000~40,000r/min)
Temperature Range: 0~200°C
Temperature Resolution: 0.5°C
Temperature Accuracy: ±2°C