Sound Level Meter

Thermo-hygrometer

Thermometer

Infrared-thermometer

Clamp-meter

CENTER 320 Sound Level Meter

Our standard sound level meter CENTER 320 has a wide dynamic range from 30 to 130 dB. It has different frequency weighting A and C to respond to human sense or machine monitoring purposes. For different sound pattern, it also supplies Fast and Slow time constant setting. Analog output is also provided for other use.

Features:

 

• 4 Digits Display.
• MAX/MIN Function.
• Level Range Display.
• Resolution 0.1dB.
• AC/DC Signal Output.
• IEC 651 TYPE II.

Specifications:

Level Range: Lo=30~80dB ; Med=50~100dB ; Hi=80~130dB
Accuracy: 1.5dB (ref 94dB@1KHz)
Frequency Weighting: A / C
Time Weighting: Fast, Slow
Dynamic Range: 50dB
Frequency Range: 31.5Hz to 8KHz
Microphone: Electret condenser microphone
Auxiliary Outputs: AC/DC Output
Battery: 9V battery
Dimensions: 275x64x30 mm
Weight: Approx.280g

Standard Accessories:

Battery, Operation Manual, Carrying Case, Calibration Screwdriver, Windscreen, 3.5Ø plug.

CENTER 321 Sound Level Meter (PC Interface)

CENTER 321 is our newly designed sound level meter. With all the functions 320 can provide, we had changed something in new designed back light LCD. We had added fast analog bar with peak hold two second in this tester. An auto range function is added for the tester to choose one proper range for measuring by the tester itself. RS232 interface is also added to provide real time data to the computer.

Features:

 

• PC Interface.
• Bargraph Indication.
• MAX/MIN Function.
• Auto Ranging (30~130dB).
• Resolution 0.1dB.
• Level Range Display.
• AC/DC Signal Output.
• Auto Power Off.
• IEC 651 TYPE II.

Specifications:

Level Range: Lo=30~80dB ; Med=50~100dB ; Hi=80~130dB
Accuracy: 1.5dB (ref 94dB@1KHz)
Frequency Weighting: A / C
Time Weighting: Fast, Slow
Dynamic Range: 50dB
Frequency Range: 31.5Hz to 8KHz
Microphone: Electret condenser microphone
Auxiliary Outputs: AC/DC Output
Battery: 9V battery
Dimensions: 275x64x30 mm
Weight: Approx.280g

Standard Accessories:

Battery, Operation Manual, Carrying Case, Calibration Screwdriver, Windscreen, 3.5Ø plug.

CENTER 322 Sound Level Meter (Datalogger/PC Interface) 

If one needs long time on site sound monitoring, CENTER 322 will be the choice. With its build in 32000 records deep memory, it can gather all the data you need just by this tester and a tripod. After the data is collected, the user can download the data to the computer at his convenient place.

Features: 

• PC Interface.
• 32,000 Records Datalogger.
• Bargraph Indication.
• MAX/MIN Function.
• Auto Ranging (30~130dB).
• Resolution 0.1dB.
• Clock Display.
• Level Range Display.
• IEC 651 TYPE II.

Specifications:

Level Range: Lo=30~80dB ; Med=50~100dB ; Hi=80~130dB
Accuracy: 1.5dB (ref 94dB@1KHz)
Frequency Weighting: A / C
Time Weighting: Fast, Slow
Dynamic Range: 50dB
Frequency Range: 31.5Hz to 8KHz
Microphone: Electret condenser microphone
Auxiliary Outputs: AC/DC Output
Battery: 9V battery
Dimensions: 275x64x30 mm
Weight: Approx.280g

Standard Accessories:

Battery, Operation Manual, Carrying Case, Calibration Screwdriver, Windscreen, 3.5Ø plug, Software, RS-232 cable.

CENTER 329 Compact Size Sound Level Meter (Low Cost)

Features:  

• Mini Size.
• Low Cost High Performance.
• Level Range Display.
• MAX Hold Function.
• Auto Power Off.

Specifications:

Level Range: 40dB~130dB
Accuracy: 2dB(ref 94dB@1KHz)
Resolution: 0.5dB
Frequency Weighting: A, C
Time Weighting: Fast, Slow
Dynamic Range: 30dB
Frequency Range: 125Hz to 8KHz
Microphone: Electret condenser microphone
Power Supply: 9V Battery
Dimension: 2325434 mm
Weight: Approx. 200g

Standard Accessories:

Battery, Operation Manual.

CENTER 326 Sound Level Calibrator (1KHz) 

By many regulations, sound level meters need to verify their accuracy before and after measurements. Our sound calibrator series are designed to fulfill this customer needs. These calibrators provide different sound level at different frequencies to fit different regulations and they are perfect for periodical check on their sound level meters.

Features: 

  •  94dB and 114dB Sound Calibrator at 1kHz.

  •  Accurate and Simple to Use.

  •  Fits 1 inch and 1/2 inch Microphones.

  •  Low battery indicator.

  •  IEC 60942(2003) Class 2,Ans1.40-1984.

Specifications:

Output Sound Pressure Levels: 
114dB and 94dB re 20uPa under reference Conditions 
Output Frequency: 1000Hz2%

Total Harmonic Distortion: <4%
Reference Condition: 
Temperature 23C(73F) 
Static press 103hpa 
Relative humidity 50%
Accuracy of sound pressure level:

Understated reference environment conditions 0.5dB
Battery test: 
Operate: Green LED indicator 
Low battery: Red LED indicator
Battery: 9V battery
Dimensions: 113x63x44 mm
Weight: Approx.170g

Standard Accessories:

Battery, Operation Manual, Carrying Case, 1/2 inch Microphone adapter.

( If you need user manual or E-catalogue for above meters, please ask for at: xiushunjie@gmail.com )