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REED SD-4023 Data Logging Sound Level Meter

Model: SD-4023 | UPC: 800837001856

REED SD-4023 Data Logging Sound Level Meter

Model: SD-4023 | UPC: 800837001856

Real time data logger with integrated SD memory card (optional) measures/records general sound levels and meets IEC 61672-1 Type 2 standards.

Sorry! This product has been discontinued.

The REED SD-4023 Data Logging Sound Level Meter has been discontinued, it has been replaced by the REED R8070SD Data Logging Sound Level Meter

REED SD-4023 Offers

This SD series sound level meter has triple range measurement and features user selectable sampling rates from 1 to 3600 seconds. Using an SD card (up to 16Gb) a user can select a desired sampling rate and quickly generate an Excel file with raw data, all without the use of software. Optional accessories include a tripod and AC adapter for continuous long-term monitoring and PC software that allows a user to tracking live measurements.


  • High accuracy of ±1.4 dB meets Type 2 standards
  • Triple range measurement (50dB dynamic range)
  • A & C frequency weighting
  • Fast & Slow time weighting
  • Real time data logger with integral SD memory card
  • User selectable sampling rate from 1 to 3600 seconds
  • Easy-to-read backlit LCD display
  • Peak hold, Data hold and Min/Max hold
  • Optional PC software features live tracking via USB connection
  • Tripod mount for long-term monitoring
  • Low battery indicator and auto shut off

REED SD-4023 Specifications

Measuring Ranges 30-130 dB
Low: 30-80dB
Med: 50 -100 dB
High: 80 -130 dB
Full: 30-130 dB
Dynamic Range 50 dB (in each range)
Accuracy 31.5Hz ± 3.5 dB, 63 Hz ± 2.5 dB, 125 Hz ± 2.0 dB,
250 Hz ± 1.9 dB, 500 Hz ± 1.9 dB, 1 kHz ± 1.4 dB,
2 kHz ± 2.6 dB, 4 kHz ± 3.6 dB, 8 kHz ± 5.6 dB
Resolution 0.1 dB
Response Time 500ms
Frequency Range 31.5 Hz to 8 kHz
Frequency Weighting A, C
Time Weighting Fast/Slow (200ms and 500ms)
Microphone 0.5" (12.7mm) electret condenser
Display 4-digit LCD
Backlit Display Yes
Data Hold Yes
Min Yes
Max Yes
Alarm Indicators Under and Over (visual on-screen)
Datalogging Capabilities Yes
Real-Time Clock and Date Stamp Yes
Selectable Sampling Rate Yes (1, 2, 5, 10, 30, 60, 120, 300, 600, 1800, 3600s)
External Memory Yes, expandable up to 16Gb with SD card (optional)
Auto Shut-off Yes (after 10 mins/off)
Kick Stand Yes
Tripod Mountable Yes
Low Battery Indicator Yes
Power Supply 6 x AA batteries or AC Adapter (optional)
Output Yes (AC)
Battery Life Sampling Time Dependent
PC Connectivity USB Cable (optional)
Software   SW-U801-WIN Software (optional)
Software OS Compatibility Windows XP / Vista / 7
Product Certifications CE, IEC 61672-1 Class 2
Operating Temperature 32 to 104°F (0 to 40°C)
Storage Temperature 14 to 140°F (-10 to 60°C)
Operating Humidity Range 10-90%
Dimensions 9.7 x 2.7 x 1.8" (245 x 68 x 45mm)
Weight 17.3oz (489g)

What's included with the REED SD-4023

  • Data Logging Sound Level Meter
  • Batteries

Ideal Applications for the REED SD-4023

  • Preventative Maintenance
  • Industrial Machinery/Equipment
  • Construction Sites
  • Ensuring Safe Working Conditions
  • Public Venues / Concerts
  • Code Enforcement
  • Traffic
  • Appliance Noise Testing
  • Long-term Measurement
  • Recording of Acoustic Levels for Environmental Impact Studies

Click on a category to view a selection of compatible accessories with the REED SD-4023 Data Logging Sound Level Meter.

REED CA-05A Medium Soft Carrying Case

Model: CA-05A

Features a main instrument compartment and a side pouch for accessories.

REED SD-4GB SD Memory Card, 4GB

Model: SD-4GB

For use with the REED SD Series Dataloggers and R2100 Thermal Imaging Camera.

REED SW-U801-WIN Data Acquisition Software

Model: SW-U801-WIN

For use with REED SD Series Dataloggers, GU-3001 and TQ-8800.


Model: USB-01

For use with the REED SD Series Dataloggers, GU-3001 and TQ-8800.

REED SB-01 Windshield Ball for Sound Level Meters

Model: SB-01

This windshield ball is compatible with 1/2" microphones.

REED R8090 Sound Level Calibrator

Model: R8090

This sound calibrator generates a stable acoustic signal at a controlled frequency and amplitude to verify the accuracy of your sound level meter.

REED R1500 Tripod

Model: R1500

Expandable up to 56" and features an add-on adapter capable of mounting instruments without a tripod mount. The R1500 is a convenient accessory for any data logging instrument setup for long-term continuous monitoring.