Sound Level Meter - SL-4035SD - Bismillah Scientific Co.

The SL-4035SD Sound Level Meter provides accurate and reliable measurements of sound pressure levels (SPL) and equivalent continuous noise levels (Leq), with real-time data logging capabilities, making it an essential tool for various industrial, environmental, and occupational health applications.

Exceptional Features of the SL-4035SD

SD Card Real-Time Data Logger: Saves measuring data along with time information (year, month, date, hour, minute, second) into the SD memory card, enabling easy download to Excel for further data analysis without extra software.
Frequency and Time Weighting: Designed to meet IEC 61672 Class 2 standards. A & C weighting networks comply with standards. Time weighting options include Fast (125 ms) and Slow (1 s) for accurate response to varying sound levels.
Wide Measurement Range: Measures sound levels from 30 to 130 dB with auto and manual range selection. Offers precision linearity over a wide range (100 dB) and displays Leq and SPL measurements.
User-Friendly Design: Features a large LCD with green backlight for easy reading, data hold function, peak hold, and memory recall for maximum and minimum values. The instrument also includes a built-in clock and calendar for time-stamped data logging.
Advanced Connectivity: Includes RS232/USB computer interface for data output, enhancing data management and integration with other systems.
Durable and Portable: Constructed with a heavy-duty and compact housing case, making it easy to carry and use in various environments. Long battery life with low power consumption.

Specifications
Circuit	: Custom one-chip of microprocessor LSI circuit.
Display	: LCD size	: 52 mm x 32 mm
	: LCD with green backlight (ON/OFF).
	: —
Measurement Range	: 30 – 130 dB.
Resolution	: 0.1 dB.
Function	: dB (A & C frequency weighting)
	: Time weighting (Fast, Slow)
	: Peak hold, Data hold
	: Record (Max., Min.)
	: —
Accuracy	: Characteristics of “A” frequency weighting network meet IEC 61672-1-2013 class 2
	: Under 94 dB input signal, the accuracy are	: 31.5 Hz ± 3.0 dB Temperature, 63 Hz ± 2.0 dB Operating Less than 85% R.H., 125 Hz ± 1.5 dB, 250 Hz ± 1.5 dB, 500 Hz ± 1.5 dB, 1 K Hz ± 1.0 dB, 2 K Hz ± 2.0 dB, 4 K Hz ± 3.0 dB, 8 KHz ± 5.0 dB.
	: Remark	: The above spec. are tested under the environment RF Field Strength less than 3 V/M & frequency less than 30 MHz only.
Frequency Weighting Network	: Characteristics of A & C.
	: A weighting	: The characteristic is simulated as “Human Ear Listing” response. Typical, if making the environmental sound level Accessories measurement, always select to A weighting.
	: C weighting	: The characteristic is near the “FLAT” response. Typical, it is suitable for checking the noise of machinery (Q.C. check) & knowing the sound pressure level of the tested equipment.
Data hold	: Freeze the display reading.
Peak hold	: To keep the peak (max.) measurement value.
Time weighting	: Fast – t = 125 ms. “Fast” range is simulated the human ear response time weighting.
	: Slow – t = 1 s. “Slow” range is easy to get the average values of vibration sound level.
	: —
Range selector	: Auto range	: 30 to 130 dB.
	: Manual range	: 2 range, 30 to 80 dB, 80 to 130 dB, 50 dB on each step, with over & under range indicating.
	: —	: —
Frequency	: 31.5 to 8,000 Hz.
Microphone type	: Electric condenser microphone.
Microphone size	: Out size, 12.7 mm DIA. (1/2 inch).
Calibration VR	: Build in external calibration VR, easy to calibrate on 94 dB level by screw driver.
	: Calibrated via external SOUND CALIBRATOR (SC-942, optional).
	: —
Calibrator	: B & K (Bruel & kjaer), MULTIFUNCTION ACOUSTIC CALIBRATOR Type 4226.
Datalogger Sampling Time Setting range	: Auto 1 second to 3600 seconds @ Sampling time can set to 1 second, but memory data may loss.
	: Manual Push the data logger button once will save data one time. @ Set the sampling time to 0 second. @ Manual mode, can also select the 1 to 99 position (Location) no.
	: —
Memory Card	: SD memory card. 1 GB to 16 GB.
Advanced setting	: Set clock time
	: (Year/Month/Date, Hour/Minute/ Second)
	: Set sampling time
	: Auto power OFF management
	: Set beep Sound ON/OFF
	: Decimal point of SD card setting
	: SD memory card Format
	: Frequency weighting to A or C setting
	: —
Over Indication	: Show “—–“.
Data Hold	: Freeze the display reading.
Memory Recall	: Maximum & Minimum value. (for SPL)
Sampling Time of Display	: Approx. 1 second.
Data Output	: RS 232/USB PC computer interface.
	: Connect the optional RS232 cable UPCB-02 will get the RS232 plug.
	: Connect the optional USB cable USB-01 will get the USB plug.
AC output	: AC 0.5 Vrms corresponding to each range step.
	: Output impedance	: 600 ohm.
	: —
Power off	: Auto shut off saves battery life or manual off by push button.
Operating Temperature	: 0 to 50 ℃.
Operating Humidity	: Less than 85% R.H.
Power Supply	: Alkaline or heavy duty DC 1.5 V battery (UM3, AA) x 6 PCs or equivalent.
	: DC 9V adapter input. (AC/DC power adapter is optional).
	: —
Power Current	: Normal operation (w/o SD card save data and LCD Backlight is OFF)	: Approx. DC 12 mA.
	: When SD card save the data but and LCD Backlight is OFF)	: Approx. DC 51 mA.
	: If LCD backlight on, the power consumption will increase approx. 30mA.
Weight	: 489 g/1.08 LB.
Dimension	: 245 x 68 x 45 mm. (9.6 x 2.7x 1.9 inch).
Accessories Included	: Instruction manual	: 1 PC
	: Hard carrying case, CA-06	: 1 PC
	: —	: —
Optional Accessories	: Sound calibrator (94 dB), SC-941.
	: Sound calibrator (94/114 dB), SC-942.
	: Sound wind shield ball, SB-01
	: SD Card (2 GB)
	: USB cable, USB-01.
	: RS232 cable, UPCB-02.
	: Data Acquisition software
	: SW-U801-WIN.
	: AC to DC 9V adapter.
	: Soft carrying case, CA-05A.

Technical Specifications
Display	: Type	: Large LCD with green backlight
	: Size	: 52 mm x 32 mm
	: —	: —
Measurement Functions
Sound Pressure Level (SPL)	: Range	: 30 to 130 dB
	: Resolution	: 0.1 dB
	: Accuracy	: ±1.4 dB @ 1 kHz, 23 ± 5℃
	: Frequency Weighting	: A & C weighting networks
	: Time Weighting	: Fast (125 ms), Slow (1 s)
	: Measurement Types	: SPL, Leq, Max, Min
	: Microphone	: Electric condenser microphone, 12.7 mm DIA. (1/2 inch)
General Specifications	: Circuit	: Custom one-chip microprocessor LSI circuit
	: Calibration	: Built-in external calibration VR, easy to calibrate on 94 dB level
	: Power Supply	: DC 1.5V batteries (UM3, AA) x 6 PCs, or DC 9V adapter
Power Consumption	: Normal operation (without SD card save data and LCD backlight off)	: Approx. DC 12 mA
	: With SD card save data and LCD backlight off	: Approx. DC 51 mA
	: Additional power consumption with LCD backlight on	: Approx. DC 30 mA
Operating Environment	: Temperature	: 0 to 50℃
	: Humidity	: Less than 80% RH
	: —	: —
Data Logger	: Automatic	: 1 second to 3600 seconds
	: Manual	: Push the data logger button once to save data
	: —	: —
SD Card Capacity	: 1 GB to 16 GB
Dimensions	: 245 x 68 x 45 mm (9.6 x 2.7 x 1.9 inch)
Weight	: 489 g (1.08 lb)

Accessories Included:

Instruction Manual: 1 PC
Hard Carrying Case: 1 PC

Optional Accessories:

Sound Calibrator (94 dB), SC-941
Sound Calibrator (94/114 dB), SC-942
Sound Wind Shield Ball, SB-01
SD Card (2 GB)
USB Cable (USB-01)
RS232 Cable (UPCB-02)
Data Acquisition Software (SW-U801-WIN)
AC to DC 9V Adapter
Soft Carrying Case (CA-05A)

Advanced Features:

Real-Time Data Logging: Records data with time-stamp information for detailed analysis.
Frequency and Time Weighting: Meets IEC 61672 Class 2 standards for accurate sound level measurements.
Zero and Calibration Adjustment: Easy calibration using front panel buttons.
Auto Power Off: Conserves battery life by automatically shutting off the meter.
RS232/USB Interface: Enhances data management and integration with computer systems.
Wide Application Range: Suitable for environmental noise assessments, occupational health monitoring, and industrial noise measurements.

Invest in the SL-4035SD Sound Level Meter for precise and reliable sound level measurements with real-time data logging, ensuring high performance and versatility in various industrial, environmental, and occupational health applications.