Top 10 Best Noise Level Monitor For Classroom

Unit plugs into AC 120 volt electrical outlet with included UL approved transformer Input 100-240V AC 50-60Hz, Output 9V DC 500mA or can be used with 6 AA alkaline batteries sold seperately.. Unit can be self-standing or wall-mounted.. Traffic light is computerized with adjustable sound level meter.. Red light counter registers each time the red light activates. Push reset button to reset counter to zero.. Decibel sensitivity control can be set to operator's choice. Push button to devrease sensitivity. Also offers manual operation option of staying on a given light color. Option face stickers provided to add the element of emotion ot the lights. Green light stays lit until noise in room goes above set level determined by user, green light is replaced with a flashing yellow light as a warning. When sound level reaches 15 dB above set level, the red light and siren are activated. Voice Queit Please in 4 languages or your own recording and siren otions. User has the option of turning sounds on or off. Delayed Alarm Function will sound when noise continues for more than 2 seconds..

Large Screen LCD Display.

The sound level meter is an instrument used to measure the ambient sound level,such as sound level around factories,workshops,schools,residential,offices,road,audio etc. It also can be appropriate for noise engineering,product quality control,health prevention and treatment,etc.This audio noise measure device is a great tool for checking, monitoring or controlling and test the sound level of any environments. It is widely applicable for personal, families, business, studies, industrial and etc. With the measuring scope from 30 to 130dB and shifting function. Digital display,good anti-interference performance,power saving. With the backlight feature,it is appropriate for gathering the sound data at night.Backlight auto power off function is provided.With power saving and high-reliability circuit design,well-design high-efficiency power supply circuit makes the batteries more durable. Composite material injection molding process is adopted for casing with anti-drop structure design.It is not only extremely wear-resisting,but also elegant,Its a mini handheld portable sound level reader.

USEFUL TOOL IN YOUR WORK LIFE This sound level meter is a great tool for checking, monitoring or controlling the sound level of any environments. It is widely applicable for personal, families, business, studies, industrial and etc.. WIDE RANGES ACCURATE MEASUREMENT It measures range from 30 130 dB with frequency range from 31.5 to 4Khz. Highly accurate with -1.5dB.. TIME WEIGHTING FREQUENCY WEIGHTING FAST125mS for time weighting. TYPE A for frequency weighting.. HOLD , MAX MIN, AUTO POWER OFF, BACKLIT Including all useful features such as data hold, max recorded reading and min recorded reading as well as auto power off. Backlit feature allows use of this meter in the dark.. GIFT BOX PACKAGE - Black carrying pouch and premium color gift box are come with the meter..

Measures frequency weighted noise exposure and peak C, Z sound level. Datalog's up to 999,999 readings when used as a sound level meter with sampling times between 1 second and 24 hours. Sound level mode displays sound level, minmax, time-averaged sound level Leq, peak, and sound exposure level SEL. Adjustable Criterion Level, Exchange Rate and Threshold. One user-defined measurement setup.

1. Measuring range 30 to 130dB, the product operation is very convenient, it can be used only by connecting the power supply additional power supply needs 5V 1A accuracy 1.5dB reference sound pressure level, 94dB 1KHz, frequency response range 31.5Hz 8.5KHz. 2. Large 9.6-inch LCD display with backlight, powered by DC 5V 1A Micro USB socket, this meter can be used to measure noise in various occasions and accessories, such as factories, offices, homes, traffic routes, audio, air-conditioning refrigerators, etc. Wait. 3. Alarm switch setting short press the horn button to turn off the alarm and the red light goes out, then press the horn button to turn on the alarm, and the red light is on. In the normal measurement state, long press the horn key to enter the alarm setting, adjust the alarm value through the up and down keys, short press the horn key to save the alarm value, or short press the power key to cancel the setting.. 4. Note Power on, short press the switch machine button to shut down, long press the switch machine button, automatic startup function the product will automatically turn on when connected to the power supply, long press the switch machine button, it will shut down, if LCD display appears The numbers on the screen do not jump, and garbled characters appear. You need to restart the machine. If you have any questions, please contact us in time.. 5. Note The device needs an additional charger, which matches the standard 5V 1A charger. The voltage and current must not exceed 5V 1A. If it is too large, it will burn the circuit board. When using the sensor, please pay attention to whether there is any blockage of foreign matter. If the device is turned on, the LCD display does not display, and the sensor may be faulty. Please contact us in time, we will handle it for you as soon as possible..

ACCURATE AND SENSITIVE SOUND METERThe Protmex spl meter have a 0.5s response time, can measure noise level, and quickly display accurate measurement results.Measuring Range 30130dB -1.5dB Accuracy with 0.1dB Resolution. Frequency ranges from 30Hz to 8KHz.. MAXMINHOLD FUNCTION DECIBEL METERThe Protmex sound level meter with a data logger can record the current maximum or minimum decibel value the decibel reader and recorder can freeze the reading on the display without worrying that the reading is too fast to record.. DIGITAL LCD DISPLAY BACKLIGHT FUNCTION The Digital Sound Level Meter has a large clear LCD backlight display that can show the measurement clearly. Turn on the backlight to get the reading easily during the night and reduce the damage to the eyes.. WIDELY APPLICATION SOUND DECIBEL METERThe decibel meter can be used in many environments and is also suitable for noise engineering, product quality control, health prevention, and treatment, etc. This audio noise measurement equipment is an excellent tool to check, monitor or control and test any environmental sound level. Widely applicable to individuals, families, enterprises, learning, industry, etc.. GUARANTEED SERVICEWe guarantee that we will reply to your questions, comments, and requests as soon as possible. If you are not satisfied with the products, please feel free to contact us, and we will provide you with a replacement service or return service..

Sound db meter calibrated at factory, noise measurement range from 0 - 130dBA, accuracy 1.5dB, resolution 0.1dB. Disable the automatic off function, sound meter can continuously measure noise value. Sound meter features backlight alarm, large LCD display, maximum minimum noise monitor, data hold function, automanual power off, disable the auto off function, sound level meter can continuously measure noise value, battery indication. Decibel meter is ideal for music recording, home theater setup, neighbors noise complaints, job-site and noise pollution monitoring. Portable sound level meter is light and compact design, easy to carry with you and operate with one-hand. Noise meter comes with 3 pcs AAA batteries, a wind-proof sponge ball and user manual.

This uses to measure the sound level of sound equipment in Work and Life such as factories, workshops, schools, residential, office areas, traffic roads, audio and other occasions. Also applies to noise engineering, product quality control, health control and so on.. The Protmex Noise Meter With the backlight feature, it is appropriate for gathering the sound data at night. To save power, backlight auto power off function is provided.. The Sound level meter utilize a electrics condenser microphone to monitor sound levels from 30 to 130 decibels at an accuracy of -1.5 dB with a 0.1 dB resolution. A and C weighting network selection.. Maximum MAX locking function Digital display, good anti-interference performance, power saving. The Protmex sound meter weighs less than 7 ounces, and is designed to fit comfortably in the palm of your hand..

Portable Sound Level Meter A practical little tool great for noise pollution monitoring, home theater setup, health and safety compliance, vehicle noise testing, etc.. HD Digital LCD Display Larger legible LCD display with backlight,which can quickly show the measurement, clearly and easy to read.. Power Source Power supply is 3 pcs AAA batteries Included, low battery indication, auto power off without operation after 10 minutes, convenient and power saving.NOTEIn order to install the battery, you must take off the wind-resistant ball and the protective case. Multi-function Measuring range is 30 - 130 dBA. MaximumMinimumData hold function Auto power off Battery indicator Check the remaining battery directly.. Widely Application Designed to meet the measurement requirement of sound quality control in various environment.Ideal for testing music recording, neighbor noise complaints, industrial settings, office settings, speech therapy more..