What does “2-in-1” mean for this tachometer?
It means the device offers two measurement methods in one unit: contact measurement, where the tachometer physically touches a rotating shaft (using an adapter/attachment), and non-contact measurement, where you simply aim the laser at reflective tape on the rotating object to read RPM.
How do I use the non-contact mode?
Attach a small piece of reflective tape to the rotating object, point the tachometer’s laser at the tape, and press the measurement button. The device counts the light reflections and displays the rotational speed in RPM — no physical contact required.
When should I use contact mode instead of non-contact?
Use contact mode when:
- The surface is not accessible by laser (e.g., deep inside machinery)
- The object rotates too slowly for reliable laser detection
- There isn’t a suitable spot for reflective tape
Non-contact mode is ideal when the object is dangerous to touch (hot, moving machinery) or when you want a quick, hands-off reading.
What are the MAX/MIN/AVG/HOLD functions used for?
- MAX – records the highest RPM reading during measurement
- MIN – records the lowest RPM reading
- AVG – calculates the average speed over a measurement session
- HOLD – freezes the current reading on the screen so you can note it down
These are especially useful for monitoring speed fluctuations in engines, motors, and conveyor systems.
What is the rotatable LCD backlight screen for?
The screen rotates so you can hold the device at different angles and still read the display comfortably. The backlight lets you take measurements in dark or poorly lit environments such as engine bays, factories, or outdoors at night.
Which measurement units are available?
The tachometer supports unit conversion, allowing you to switch between units (typically RPM and other rotational speed units, e.g., m/min or ft/min in contact mode), so you can work in the unit most convenient for your application.
How does the Bluetooth feature work?
The built-in Bluetooth connects the tachometer to a companion mobile APP on your smartphone or tablet. Through the APP you can view measurement data in real time, record readings, and manage stored data — making reporting and documentation easier.
Is there an auto power-off function?
Yes. The device automatically powers off after a period of inactivity to conserve battery life, so you don’t have to worry about accidentally draining the batteries.
Can this tachometer store measurement data?
Yes, it features built-in data storage, allowing you to save readings directly on the device. Combined with the Bluetooth APP, you can transfer and organize your measurement history for analysis or reporting.
Why are there two measurement buttons?
The two buttons are designed for convenient one-handed operation — one for contact measurement and one for non-contact measurement. This lets you switch modes and take readings quickly without navigating through menus.
What can I use this tachometer for?
Common applications include:
- Measuring motor and engine RPM
- Checking fan, pump, and blower speeds
- Machinery maintenance and troubleshooting
- Industrial production line monitoring
Is the device safe to use on running machinery?
Yes — the non-contact laser mode lets you measure rotating equipment from a safe distance without touching moving parts. For contact mode, always follow standard safety procedures: ensure the shaft is accessible, keep loose clothing away, and never use the contact adapter on excessively hot or hazardous surfaces.
