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    Laser Sensor, Vibration/Thickness Measurement, M18, Range 300mm

    Cylindrical M18 laser sensor adopts diffuse reflection detection mode, with stainless steel housing (thread size M18*1.5mm), laser spot size 4mm, fast response time 0.1ms, optional output mode NPN/PNP NO/NC, protection class IP67, can be used for vibration measurement, or object thickness/ flatness detection. The maximum detection range of M18 diffuse reflection laser sensor is 300mm.
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    Laser sensor with M18*1.5mm metal detection head, 4mm spot size, diffuse reflection detection mode, NPN/PNP NO/NC output mode for selection.


    Model ATO-LASES-M18
    Shipping weight 2kg
    Thread size M18*1.5mm
    Detection of spot size 4mm
    Detection mode Diffuse reflection type
    Detection range Sn=300mm, Sn=500mm
    Light source Infrared ray LED (880nm)
    The laser beam is invisible. The laser spot is visible.
    Output mode * NPN NO, NPN NC, PNP NO, PNP NC
    Power supply 10-30VDC
    No-load current <10mA
    Maximum load current 150mA
    Leakage current <0.01mA
    Voltage drop <1V
    Switching frequency 120Hz
    Response time 0.1ms
    Switching hysteresis <15% (sr)
    Repeat accuracy <1.0% (sr)
    Protection class IP67
    Environment humidity 35-95%
    Operating temperature -5~+50℃ (23~122℉)
    Temperature drift <10% (sr)
    Short circuit protection Yes
    Indicator light Yes
    Housing material 304 stainless steel
    Connection method Direct lead wire
    Cable length 2m

    Note: The detection range of diffuse reflection laser sensor can be adjusted by the knob (Clockwise rotation for adding distance, anticlockwise rotation for reducing distance).
    Dimension (unit: mm):
    M18 diffuse reflection/through beam laser sensor dimension
    Wiring diagram:
    Diffuse reflection/through beam laser sensor M18 wiring diagram

    Tips: Laser sensor for vibration measurement
    Using laser sensor for vibration measurement is based on the Doppler principle. The Doppler principle means that if the wave source or the observer receiving the wave moves relative to the medium in which the wave propagates, the frequency measured by the observer depends not only on the frequency of vibration emitted by the wave source but also on the magnitude and direction of the speed of motion of the source or observer. The difference between the measured frequency and the frequency of the wave source is called the Doppler shift. This kind of laser vibration sensor converts the vibration of the object into the corresponding Doppler frequency shift by the optical part during measurement, and converts the frequency shift into an electrical signal by the photoelectric detector. After appropriate processing by the circuit part, it is sent to the Doppler signal processor. The Doppler signal processor converts the Doppler-shifted signal into an electrical signal corresponding to the vibration velocity, which is finally recorded on a magnetic tape. This laser vibration sensor uses a helium-neon laser with a wavelength of 6328 angstroms, uses an acousto-optic modulator for optical frequency modulation, uses a quartz crystal oscillator and a power amplifier circuit as the driving source of the acousto-optic modulator, uses a photomultiplier tube for photoelectric detection, and using a frequency tracker to process the Doppler signal. The advantage of this laser sensor is that it is easy to use, does not require a fixed reference frame, does not affect the vibration of the object itself, and has a wide measurement frequency range, high precision and large dynamic range. The disadvantage is that the measurement process is greatly affected by other stray light.

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