Testo475 tachometer/tachometerDetailed product description：

Teste475 measures the speed and vibration of difficult to access machine components, which is fast and convenient for use in rechargeable batteries

Testo475 tachometer/tachometer technical data
Probe type	Flash instrument	maneuver
range	+100... +20000 rpm +1.67... +333 Hz	+20... +20000 rpm
Precision	± 1 digit
Power supply	rechargeable battery
Operating temperature	0... +50°C
Storage temperature	-20... +70°C
size	168 x 72 x 27 millimeters
weight	170 grams
maintenance	2 years
External input	CMOS (High level 3.5V), Circuit, overvoltage protection, automatic switching of flash frequency after square wave formation
External Output	CMOS (High Level 3.5V) Short Circuit Protection
Ready (can be closed)	If no frequency is received within 33 seconds, the correction value will automatically lock the flash tube ignition pulse
rechargeable battery	6 NiCd 1.2 V/600 mAh
battery life	About 30 minutes (90% fully charged and based on maximum flash frequency)

Split probe design, suitable for measuring areas that are difficult to reach
Adopting the "quick search" function greatly improves measurement speed
Battery operation
No need to fix reflective stickers
Not interfering with the production process
Dual row display, synchronously displaying rpm speed and frequency
External trigger can be used for measuring ratio and phase correction
Optional mechanical rpm speed probe
Note: mv represents "measured value"