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Testo 477 LED Stroboscope

Testo Approved distributor and service company.

Includes: Testo 477, transport case, trigger signal connector, battery and calibration protocol.

0563 4770
£578.55 Save 5%
Tax excluded
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The Testo 477 LED hand stroboscope is used when it is necessary to make fast-moving objects appear in slow motion. Testo 477 visualises rotation and vibration movements and allows measurement during continuing operation. The static image allows the inspection and qualitative evaluation of components moving at high frequencies.

You can also use the testo 477 to seemingly "freeze" the movement of an object. Without making contact with the object, you can precisely determine its rotational speed or the frequency of shifts in direction. Compared to other portable stroboscopes, the Testo 477 LED stroboscope can be operated with just one hand.


High measuring range: up to 300000 flashes per minute (fpm).
Very high light intensity of up to 1500 Lux.
Long operating time thanks to battery life up to 5 h.
Ideal for tough applications thanks to impact protection and IP65.
Trigger input and output.

Testo 477 Specifications
Flash Parameters
Flash duration Adjustable.
Flash strength 1500 lux @ 6000 FPM/20 cm.
Flash colour approx. 6500 K.
Trigger Input
Principle Optocoupler.
Low level < 1 V.
Level 3 to 32 V (square-wave voltage), NPN+PNP.
Minimum pulse length
50 μs.
Reverse voltage protection
Trigger Output
Short-circuit and overvoltage-proof transistor output.
Level NPN, max. 32 V.
Pulse length Adjustable.
Maximum power 50 mA.
Reverse voltage protection
Voltage Supply
Power 3 x AA batteries or 3 x NiMH rechargeable batteries (AA) .
Operating time (depending on settings)
NiMH rechargeable battery: approx. 11 h @ 6000 FPM
Batteries: approx. 5 h @ 6000 FPM.
General Specifications
Frequency range 30 - 300,000 FPM (flashes per minute).
Display LCD, multiline.
Accuracy 0.02 % (+/- 1 digit).
Resolution +/- 0.1 (30 to 999 FPM)
+/- 1 (1000 to 300,000 FPM).
Protection class IP65.
Operating temperature 0 to 45 °C.
Material Aluminium.
Dimensions 191 x 82 x 60 mm.
Weight approx. 400 g (with batteries).
Testo 477 warranty 2 years.


Testo 477 Datasheet

PDF Specifications of the Testo 477 LED Stroboscope.

Download (278.7k)

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Testo 477 LED Stroboscope

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