HHSL402SD Handheld, 30 to 130 dB Digital Sound Meter w/Data Logger

Supported Applications

The Omega HHSL402SD is a general-purpose handheld sound level meter designed to measure the noise levels of an environment or the sound produced by machinery. The instrument utilizes an integrated condenser microphone for acoustic measurements and includes automatic datalogging capabilities suitable for recording environmental data over time.

Operating Conditions & Performance

The HHSL402SD measures sound pressure levels from 30 to 130 dB with a resolution of 0.1 dB. It operates within an ambient temperature range of 0 to 50°C (32 to 122°F) and supports relative humidity up to 85%. The device features autoranging mode or selectable fixed ranges: 30 to 80 dB, 50 to 100 dB, or 80 to 130 dB. Frequency response spans from 31.5 Hz to 8 kHz.

Measurement accuracy varies by frequency when using "A" weighting:

• ± 3.5 dB @ 31.5 Hz
• ± 2.5 dB @ 63 Hz
• ± 2 dB @ 125 Hz
• ± 1.9 dB @ 250 Hz and 500 Hz
• ± 1.4 dB @ 1 kHz
• ± 2.6 dB @ 2 kHz
• ± 3.6 dB @ 4 kHz
• ± 5.6 dB @ 8 kHz

The meter supports time weighting options of fast or slow, corresponding to response times of 200 ms and 500 ms respectively.

Data Logging & Display

Automatic datalogging is configurable with sampling intervals from 1 second to 9 hours (or up to 1 hour per specification table). Data is stored on SD memory cards ranging from 1 GB to 16 GB capacity in Excel-compatible .xls files. The front panel features a green backlit LCD display measuring 52 x 38 mm (2.05 x 1.5") with an overall diagonal of 64 mm (2.5").

Configuration Options

The HHSL402SD series includes configurable parameters for date, time, auto power off, beep sound, decimal point or comma division, and frequency weighting selection between "A" and "C" standards. The unit is powered by six alkaline "AA" batteries or an optional 9 Vdc AC adaptor.

Key interface features include:

• RS-232 output jack for data transfer
• AC output terminal
• Tripod attachment nut (1/4")
• Kickstand for stable placement
• SD card socket supporting up to 16 GB cards

The instrument measures 245 x 68 x 45 mm (9.65 x 2.68 x 1.77") and weighs 489 g (1.08 lbs). It includes a calibration screw for adjustment by an optional laboratory instrument.

Accessories & Options

The standard package includes a sound wind shield ball, hard carrying case, six "AA" batteries, operator's manual, and a 2 GB SD memory card. Optional accessories include:

• Spare 2 GB SD card (Model: 2GB-SD)
• AC power adaptor (Model: ADAPTER-SD)
• Data logging software for Windows with RS232 cable (Model: SW-U101-WIN)
• Optional RS232 interface cable (Model: RS232-SD)

Key Product Differences

The HHSL402SD is the primary model in this series, described as a sound meter with data logging SD card capability. No alternative housing styles or sensor configurations are documented for this specific product line within the provided sources.