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Typical representation of REED SL-4022 Decibel Level Meters (Discontinued) Product picture of SL-4022 REED Decibel Level Meters (Discontinued) for illustration purposes only. Actual product may vary.
SL-4022 model with carrying case and accessories
This decibel meter comes with AC output for system expansion
This REED SL-4022 Sound Level Meter can be mounted on standard tripod
Changeable condenser microphone for high accuracy & long-term stability.
REED SL-4022

Decibel Level Meters (Discontinued)


The REED SL-4022 is a high-quality and extremely easy to use sound level meter. This is an IEC 61672 Class 1 Reed decibel meter with warning indicator for over and under load.

Accredited calibration/NIST traceable calibration certificate for REED SL-4022 Decibel Level Meters (Discontinued) might be available on request (for an extra charge). Please contact us for more info.

REED Decibel Level Meters (Discontinued): instrument description

This REED SL-4022 Sound Level Meter has been discontinued. Information shown here is for reference only.
We recommend Reed C-322 Noise Decibel Meter (Datalogging) available for sale in Toronto, Canada.

REED SL-4022 Features

  • Large LCD display, easy to read.
  • Electric condenser microphone.
  • Frequency weighting networks ( A & C weighting ) & Time weighting ( Fast/Slow ) are designed to meet the
    IEC 61672 Class 1.
  • AC output for system expansion.
  • Build in CALIBRATION VR on front panel.
  • Changeable condenser microphone for high accuracy & long-term stability.
  • Max. Hold function for stored the maximum value on display.
  • Build max. hold reset switch.
  • Warning indicator for over and under load.
  • LCD display for low power consumption & clear read-out even in bright ambient light condition.
  • Used the durable, long-lasting components, including a strong, light weight ABS-plastic housing case.
  • Low battery indicator.

REED SL-4022 Specifications

  • Display: 18 mm (0.7") LCD (Liquid Crystal Display), 3 1/2 digits.
  • Function: dB (A & C frequency weighting), Time weighting ( Fast, Slow),
    Max. hold, AC output.
  • Calibrator: B & K (Bruel & Kjaer) : Multi-fuction acoustic calibrator, model : 4226.
  • Range: 30 to 130 dB (A & C)
  • Range Selector: 30 to 70 dB, 60 to 100 dB, 90 to 130 dB, 40 dB on each step, with over & under range indicating.
  • Resolution: 0.1 dB
  • Internal 94dB calibration
  • Size of microphone: 0.5 inch standard size.
  • Frequency: 31.5 Hz to 8 kHz
  • Time Weighting: Fast/Slow (A & C)
  • Power Supply: 2 x 9V batteries
  • Dimensions: 10.2 x 3.4 x 1.4" (260 x 87 x 36mm)

How to use Reed Decibel Level Meters (SL-4022)

REED SL-4022 Sound Level Meter

For the instant display reading select the "Instant" position by sliding the SL-4022's "Max. hold & Instant display selector". Slide the A/C weighting selector to "A" or "C" position for sound level measuring. Now minimize the tolerance of readout and determine proper measuring range by selecting the "Range selector" The instrument will shows the dB range selection is upper or lower setting. In this case, slide range selector to other range for measuring. According on various measuring sound source, select the "Time weighting selector" to "F" or "S" position. Typically select the "Time weighting selector" to "F" position. Hold the instrument in hand and point the microphone at measured noise source, the sound level will be displayed on "dB" (decibel) unit.

Max. hold
You can hold the maximum (peak) value on display during the sound level measurement. To activate this function, slide "Max. hold & Instant display selector" to the " Max. hold " position.

Signal Output
The instrument is provided an 3.5 mm Dia. "Phone signal output terminal" for connecting with analyzer, level recorder, tape recorder, controller. Output Signal : AC output - AC 750 mVrms corresponding to each range step.

The sound level meter is built in the internal calibration "Calibration VR " on the front panel. Please according the following procedures to calibrate the instrument accurately, if it is necessary.

Ordering info

As a canadian distributor of REED Instruments products we stock most of these Decibel Meters for same day shipping. To enquire on the REED SL-4022 Decibel Level Meters (Discontinued) availability and current list price please contact us.

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