CEM DT-85A Mini Sound Noise Level Meter Tester 35-130dB Frequency Weighting : A, US $64.00 – Picture 0

CEM DT-85A Mini Sound Noise Level Meter Tester 35-130dB Frequency Weighting : A, US $64.00 – Picture 1

CEM DT-85A Mini Sound Noise Level Meter Tester 35-130dB Frequency Weighting : A, US $64.00 – Picture 2

CEM DT-85A Mini Sound Noise Level Meter Tester 35-130dB Frequency Weighting : A, US $64.00 – Picture 3

Cem Dt-85a Mini Sound Noise Level Meter Tester 35-130db Frequency Weighting : A

US $64.00

Shenzhen, China
Jan 29th

Open on mobile:
QR code

My eBay Home About Us View Feedback Contact Us Add To Favourite Store Categories Postage Offers Payment Methods Sign Up Newsletter Add my Store to your Favourites and receive my email newsletters about new items and special promotions! General Interest CEM DT-85A Mini Sound Noise Level Meter Tester 35-130dB Frequency Weighting : A N/A Store Home Ask a Question Email a Friend Item Description DT-85A Mini Sound Level Meter DT-85A Mini Sound Level Meter have a wide dynamic range from 35 to 130dB. They have different frequency weighting A and C to respond to human sense or machine monitoring purposes. For different sound pattern, they also supply Fast and Slow time constant setting.Specifications: Function Range Accuracy DT-85A Sound Level 35-130 dB ±3.0 dB (ref94dB@1KHz) * Frequency 31.5-8KHz * Frequency Weighting A Accessories: 1 x DT-85A Mini Sound Level Meter 1 x 9V battery, clamshell. 1.Household appliances noise monitoring 2 Test room noise. 3 Residential district, workplace, and laboratory and other environmental monitoring. 4 Audio, home theater volume test. Household Tips: Noise - sound intensity people feel: Intolerable: 150dB ~ 130dB Pain: 130dB ~ 110dB Noisy: 110dB ~ 70dB Quieter: 70dB ~ 50dB Quiet: 50dB ~ 30dB Very quiet: 30dB ~ 10dB Slient: 0dB Noise meter Small knowledge: 1 About dB (A) dB for noise-unit "dB"; A frequency weighting network as a way. National Standard GB / T 2888-2008 the A sound level of definition: sound level meter or the equivalent measuring instruments with this, after the A-weighted noise level measured network called A sound level, the unit symbol dB, expressed as dB (A). 2 About sonic frequency The human ear can hear the sound frequency is 20 ~ 20000Hz, called the audible sound; below 20Hz, called infrasound; than 20000Hz, called ultrasound. High-frequency acoustic sounds sharp, while the low frequency sound feels more boring. Noise from a variety of different frequencies and intensity of sound messy, irregular combination; tones are harmonious sound. Noise frequency can be divided by the sound: <400Hz frequency noise, 400 ~ 1000Hz in frequency noise,> 1000Hz frequency noise. 3 About frequency weighting A Weighting network generally have A, B, C three. A-weighted sound level is to simulate the human ear to 55dB less noise frequency charateristics low intensity; B-weighted sound level is 55dB to 85dB analog moderate-intensity noise frequency charateristics; C-weighted sound level is to simulate high-intensity noise frequency characteristics. The main difference is that the three low-frequency component of the noise attenuation, A maximum attenuation, B second, C minimum. A-weighted sound level due to its characteristic curve close to the sense of hearing charateristics the human ear, so is the world's most widely used measurement noise a, B, C has gradually goes. 4 About time-weighted "fast" and "slow" Slow response: Header time constant 1000ms, - like for measuring the steady state noise, the measured value is valid. Rapid response: Header time constant 125ms, generally used to measure the non-stationary noise fluctuations and transportation noise. Close to the human ear responds to sound. 1 According to the World Health Organization Volume analogy: 190 db lead to death 140 db EU fully defined cause hearing damage to the highest critical point 130 db sound of rocket launchers 125 db sound of jets taking off 120 db in this environment will stay longer than one minute to generate a temporary deafness 110 db sound propeller plane took off, the sound of a rock concert 105 db permanent hearing loss 100 db sound pressure rig, the sound of heavy compression hammer pounding 90 db noisy bar ambient sound, the sound of electric saws sawing wood 85 db and below will not damage the hair cells in the cochlea 80 db noisy office, the voice on the highway 75 db limit human ear Comfort 70 db sound of the street environment 50 db sound normal conversation 20 db whispering 2 Ordinary people hearing: Volume -254 dB absolutely silent universe 0-20 dB very quiet, almost feel; 20-40 dB quiet, like a whisper softly; 40-60 dB in general, common indoor conversation; 60-70 dB noisy, lossy nerve; 70-90 dB noisy, nerve cell damage; 90-100 dB noise intensifies, hearing impaired; 100-120 decibels unbearable, stay for a minute temporary deafness; 120 db above extremely deaf or deaf. Related Items Infrared Thermometer -50~330°C 24.99 (Free P&P*) Infrared Thermometer -50~500°C 29.99 (Free P&P*) Infrared Kid Body Digital Thermometer 42 (Free P&P*) nfrared Thermometer -50~550°C 25.9 (Free P&P*) Sound Noise Level Meter Tester 48 (Free P&P*) Light Lux Meter illuminometer Luxmeter 74 (Free P&P*) Digital Air Wind Speed Velocity Meter 78 (Free P&P*) 100m Laser Distance Meter 204 (Free P&P*) Payment Shipping Returns Guarantee Feedback About Us We accept payment via PAYPAL ONLY. Payment must be made within 5 days.Otherwise we reserve the right to cancel the order and re-selling the item. Please list your special requests (color, packages, etc.) in the PAYPAL note selection when you make payment. Payment Shipping Returns Guarantee Feedback About Us Worlding Shipping. Orders processed within 24-48 hours of payment verification. We only ship to confirmed EBAY addresses. Your EBAY address MUST MATCH your Shipping address. The images shown are not the actual item and are for your reference only. If you have not received your shipment within 30 days from payment, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Our goal is customer satisfaction. Due to stock status and time differences, we will choose to ship your item from our first available warehouse for fast delivery. Payment Shipping Returns Guarantee Feedback About Us You have 7 days to contact us and 10 days to return it from the date it was received. If this item is in your possession more than 7 days, it is considered used and we will not issue issue you refund orreplace. It's not exceptions! All returned items MUST BE in the original packaging and you MUST PROVIDE us with the shipping tracking number, specific reason for the return, and your eBay ID. Return shipping should be paid by Buyer. Payment Shipping Returns Guarantee Feedback About Us 12 months manufacturer's warranty for defective items (excluding items damaged and/or misused after receipt). Accessories come with a 3-month warranty. Defective items must be reported and returned to us within the warranty period (and in the original packaging, if possible). You must tell us what the defect is and give us your eBay ID. We don't repair or replace item with expired warranty. You are agree with all of above-listed policies! Payment Shipping Returns Guarantee Feedback About Us We maintain high standards of excellence and strive for 100% customer satisfaction! Feedback is very important to us. We request that you contact us immediately fefore you give us neutral or negative feedback, so that we can satisfactorily address your concerns. Payment Shipping Returns Guarantee Feedback About Us Welcome to Unacart! We are professional worldwide wholesale store. We supply many products including car black box,computers accessories, car accessories, ip camera, protective case, High product quality, reasonable prices, excellent customer service and a reliable credit standing is our tenet. © 2013-2014 UNACART - All Rights Reserved. On Jun-11-14 at 20:09:39 PDT, seller added the following information:

Condition:	New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. ...	Brand	CEM
Country/Region of Manufacture	China
Model	DT-85A
Country of Manufacture	China