Real-time Signal Analyzer
  • Real-time Signal Analyzer

Real-time Signal Analyzer

  • Product description
  • Specifications
  • NL291 Real-time Signal Analyzer


    A pocket real-time noise signal analyzer

    Real-time octave and/or 1/3 octave band analyses

    FFT analysis on noise or vibration

    Lower background noise, 90dB linearity range.

    Complies with IEC 61672 class 1 and IEC 61260 class 1

    May be select different software based on your specific needs


    Comprehensive sound measurements

    Environment noise certification and 24h monitoring

    Noise profile measurement of industrial noise

    Gathering field-data for further analyses

    Quality-testing products

    Research and development       

    Key words:
  • Frequency Response:10 Hz~20 kHz±0.2 dB, 1 Hz~23 kHz(±1.0 dB)

    Frequency Weighting: A, C, F(Flat)

    Time Weighting: F, S, and linear average

    Measuring Upper Limit: 130 dB(A),(re. 20 μPa) Self-generated Noise: <18 dB(A), 23 dB(C), 28 dB(Z)

    Measurement of Peak C sound level: 50~143 dB Linearity Range: 90dB

    Sampling Frequency:48 kHz A/D bits: 24 bits

    Integrating Time: Manual, 10s, 1min, 10min, 15min,20min, 1h, 4h, 8h, 24h

    Anti-aliasing Filter: Cutoff frequency is 23.5 kHz and stopband attenuation is 100 dB

    List of optional software                                                                                                             


    Microphone: 1/2" Prepolarized Condense Mic. Frequency response: Free field

    Sensitivity: 50 mV/Pa Frequency range: 10 Hz~ 20 kHz, ±2 dB

    Reference Direction: Axial direction of microphone

    Polarized voltage: 0 V


    AC output: Max.output voltage: 3.2V, DC output: Output voltage

    Output impedence:1 kΩ Output impedence:1 kΩ

    Indicator: 240×160 matrix LCD, with EL background lighting Data Storage. 256 kB Flash, or transferred to the Flash disk

    RS232C interface: To mini-printer or PC USB Interface: Mini B,Complying with USB 1.1, and USB 2.0, to PC

    Power Supply

    Battery: 4×LR6 batteries Operating Current: 80 mA

    Battery Life: Approx. 8 hours Ext. AC/DC adaptor: 5V, 200mA


    Temperature: -10 ℃~+ 50 ℃

    Humidity: 25 %~90 % (R.H)

    Atmospheric Pressure: 650 hPa~1080 hPa

    Electromagnetic compatibility: Comply with the requirements of IEC 61672 standard on X type


    Dimension(L×W×H): 290mm×90mm×38 mm

    Weight: < 0.5 kg (including batteries)


    Included: 1/2" Prepolarized Condense Mic. × 1      Windscreen S 80 mm × 1

    Battery LR6 × 4      Instruction Manual x 1

    Carrying case × 1      Software disk × 1

    Available: Sound Level Calibrator       Mini-printer: UP40TS × 1

    Tripod × 1      Paper for mini-printer 5 m

    Mic. Preamp. Extension Cable × 1        2 m Mic. suppor rod × 1

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