Explosion-Proof Noise Monitoring Instrument

Explosion-proof construction: Ex d IIC T6 Gb classification for applicable hazardous industrial environments.
30–130 dB measuring range: Supports continuous industrial sound level monitoring with 0.1 dB resolution.
High measurement precision: Specified accuracy of ≤±0.2 dB.
2.4-inch HD display: Local visualization of noise measurement data and instrument information.
Multiple signal interfaces: RS485, RS232, 4–20 mA and 0–5 V, with other configurations available.
Optional wireless connectivity: Wi-Fi, LoRa, Zigbee, NB-IoT and GPRS.
Intelligent noise alarms: Three-level alarm configuration with audible, visual and voice warning functions.
Optional data storage: Supports storage of more than 100,000 records when the data logging function is configured.
Smart maintenance features: Sensor fault indication, remote-control operation and optional infrared adjustment.
Industrial durability: IP67 protection and operating temperature range of -20°C to +50°C.

Product Description

The JW-501-NOISE Explosion-Proof Noise Monitoring Instrument is designed for continuous sound level monitoring in industrial environments where explosion-protected equipment may be required.

Featuring a 30–130 dB measuring range, 0.1 dB resolution, 2.4-inch high-definition display, configurable alarm functions, and multiple communication options, the instrument supports on-site noise monitoring and integration with industrial monitoring systems.

Its aluminum alloy housing, IP67 protection rating, and Ex d IIC T6 Gb explosion-proof classification make it a monitoring option for industrial facilities subject to applicable installation and certification requirements.

1. Product Overview

The JW-501-NOISE is an industrial-grade noise monitoring instrument developed for environments requiring on-site sound level measurement, alarm management and industrial communication.

Unlike compact noise sensors designed primarily for signal acquisition, the JW-501-NOISE combines a local display, configurable alarm functions, and explosion-proof construction within a complete monitoring instrument.

It can be incorporated into industrial monitoring networks to provide sound level data for operators, maintenance teams and environmental management personnel.

The instrument uses a capacitive measurement principle and provides configurable data transmission interfaces for connection to industrial controllers, monitoring terminals or remote data acquisition systems.

For projects involving multiple environmental parameters, it can form part of a broader Environmental Monitoring Solution.

2. Explosion-Proof Design for Industrial Noise Monitoring

2.1 Explosion-Proof Classification

The JW-501-NOISE is specified with an explosion-proof classification of:

Ex d IIC T6 Gb

This marking identifies a flameproof enclosure protection concept, gas group IIC, temperature class T6, and equipment protection level Gb.

The original product specification also identifies:

Explosion-proof standard: GB/T 3836 series
Listed explosion-proof certificate number: CNEx20.1135X
Enclosure protection rating: IP67
Enclosure material: Aluminum alloy

For projects in oil and gas processing, chemical manufacturing or other potentially explosive atmospheres, the instrument must be selected according to the applicable hazardous-area classification and certification requirements.

Important: IECEx, ATEX and other international certifications are not established by the supplied material. JW-IoT should verify the applicable certification documentation before confirming suitability for a specific export market.

2.2 Industrial Enclosure Protection

The aluminum alloy housing provides a protective structure for long-term industrial use.

The specification identifies resistance-related design features including protection against dust, rain, corrosion, vibration and electrical interference.

The IP67 enclosure rating supports applications requiring protection against dust ingress and temporary water immersion under the conditions defined by the rating.

Actual installation, cable glands and accessories must preserve the required enclosure and explosion-protection integrity.

explosion-proof-noise-monitor-structure-illustration

3. High-Precision Noise Measurement

The JW-501-NOISE is designed to detect changes in ambient sound levels and present readings through its built-in digital interface.

Measurement Parameter	Specification
Measuring Parameter	Noise / Sound Level
Measurement Principle	Capacitive
Measuring Range	30–130 dB
Resolution	0.1 dB
Accuracy	≤±0.2 dB
Response Time	≤3–20 seconds (as listed)
Sampling Mode	Natural sampling (default)
Noise Sensor Material	Stainless steel
Display	2.4-inch HD display

These characteristics support continuous observation of sound level changes in industrial settings.

The original information does not specify frequency weighting, time weighting, IEC 61672 sound level meter class or calibration traceability. These items should be verified separately where a project requires standardized occupational or regulatory noise measurement.

4. Digital Display and Local Operation

The instrument is equipped with a 2.4-inch high-definition screen for viewing on-site measurements and instrument information.

The display interface supports simplified Chinese, traditional Chinese and English.

The equipment also supports switching between noise units where applicable, voice muting, and resetting or adjusting certain parameters.

For installations requiring adjustment without opening the enclosure, an optional infrared remote control enables supported operations such as:

Alarm threshold adjustment
Zero-point adjustment
Range parameter modification

Remote operation can reduce the need for direct physical interaction with the instrument in supported configurations.

5. Configurable Noise Alarm Functions

The JW-501-NOISE supports configurable noise alarm functions for applications where operators need an indication when measured sound levels reach preset limits.

The listed alarm capabilities include:

Three-Level Noise Alarm

Users can configure multiple alarm levels according to site operating requirements.

Audible and Visual Alarm

The instrument supports audible and visual indication to notify nearby personnel of an alarm condition.

Voice Alarm

Voice notification functions are supported in the listed configuration options.

Alarm Delay and Sensor Fault Indication

Alarm delay, sensor fault reminders and equipment-related notifications provide additional management functions.

An optional relay configuration with dry-contact outputs allows integration with compatible alarm or control equipment.

Alarm setpoints must be selected according to the specific monitoring objective and applicable safety procedures. A noise threshold warning does not replace occupational noise exposure assessment.

6. Multiple Communication Interfaces

The JW-501-NOISE supports multiple wired and optional wireless communication configurations to accommodate industrial integration requirements.

6.1 Wired Output Options

RS485
RS232
4–20 mA
0–5 V
Ethernet (optional/configuration-dependent)

These interfaces can be selected for connection to compatible PLCs, RTUs, data acquisition terminals and industrial monitoring systems.

For related equipment, explore JW-IoT’s Data Loggers and Controllers.

6.2 Wireless Communication Options

Depending on the selected configuration, the instrument can support:

Wi-Fi
LoRa
Zigbee
NB-IoT
GPRS
Bluetooth

Wireless communication availability, supported protocols and explosion-proof installation requirements should be confirmed before purchase.

6.3 Remote Noise Monitoring Integration

Through compatible communication equipment, measured sound level data can be transmitted to a local or centralized monitoring platform.

A typical monitoring architecture may include:

JW-501-NOISE → Industrial Gateway / RTU → Communication Network → Monitoring Platform

This enables integrators to develop remote environmental noise monitoring applications where the necessary communication and software components are provided.

7. Data Logging and Event Records

For projects requiring historical noise data, the JW-501-NOISE provides optional data storage functionality.

The listed capabilities include:

More than 100,000 data records
Recording of equipment start and stop times
Recording of fault conditions
Alarm event logging
Configurable storage intervals from 1 to 999 seconds

These functions help operators review changes in environmental noise levels and investigate alarm events.

An optional recovery or reset function is also listed in the product information.

Stored data availability, export formats and retention behavior should be verified for the selected configuration.

8. Technical Specifications

Parameter	JW-501-NOISE Specification
Product Name	Explosion-Proof Noise Monitoring Instrument
Model	JW-501-NOISE
Measurement Parameter	Noise
Instrument Type	Industrial Noise Monitoring Instrument
Measurement Principle	Capacitive
Measuring Range	30–130 dB
Resolution	0.1 dB
Accuracy	≤±0.2 dB
Response Time	≤3–20 s, as specified
Operating Voltage	DC 24 V (12–30 V)
Power Consumption	≤3 W
Operating Temperature	-20°C to +50°C
Operating Humidity	10–95% RH
Operating Pressure	86–106 kPa
Display	2.4-inch HD Display
Sampling Mode	Natural Sampling (Default)
Wired Communication	RS485, RS232, 4–20 mA, 0–5 V, Ethernet (configuration-dependent)
Wireless Communication	Wi-Fi, LoRa, Zigbee, NB-IoT, GPRS, Bluetooth (optional)
Housing Material	Aluminum Alloy
Sensor Material	Stainless Steel
Explosion-Proof Marking	Ex d IIC T6 Gb
Listed Certificate Number	CNEx20.1135X
Protection Rating	IP67
Dimensions – Main Unit	154 × 222 × 91 mm
Dimensions – With Alarm Light	206 × 222 × 91 mm
Noise Sensor Dimensions	Ø18 × 255 mm
Main Unit Weight	Approx. 2.2 kg
Unit Weight With Alarm Light	Approx. 2.4 kg
Alarm Function	Three-Level Alarm
Optional Relay Output	2 dry-contact outputs
Optional Data Storage	More than 100,000 records
Storage Interval	1–999 s, adjustable
Languages	English

9. Industrial Applications

9.1 Oil and Gas Processing Facilities

Oil and gas production and processing facilities may contain areas requiring explosion-protected instrumentation.

The JW-501-NOISE can be considered for continuous environmental sound level monitoring, supporting on-site observation and integration with industrial monitoring infrastructure.

Installation suitability must be evaluated against the actual hazardous-area classification.

9.2 Chemical Processing Plants

Chemical production environments may require reliable environmental instrumentation and configurable alarms.

The instrument provides sound level monitoring, local display and communication interfaces to support centralized environmental data collection.

9.3 Industrial Workshops and Machinery Areas

Production lines, compressors, pumps and other machinery can create variable sound conditions.

The JW-501-NOISE can monitor ambient sound level changes and provide configurable alarms for operational monitoring purposes.

It is not a substitute for personal noise dosimetry or a formally specified occupational exposure assessment system.

9.4 Industrial Parks and Environmental Monitoring Networks

For distributed industrial monitoring projects, noise data can be combined with other environmental measurements, depending on system design.

Integrators can combine noise monitoring instruments with compatible environmental sensors, gateways and monitoring platforms.

Explore the JW-IoT Ambient Sensors portfolio for additional environmental monitoring devices.

10. Optional Functions and Configuration

The JW-501-NOISE can be configured for different monitoring requirements.

Option	Description
Relay Outputs	Two sets of dry-contact outputs
Infrared Remote Control	Alarm and instrument parameter adjustment
Temperature and Humidity Monitoring	Optional environmental measurement, -40 to +60°C and 0–100% RH listed detection ranges
Historical Data Storage	More than 100,000 records
Wireless Communication	Selection of supported wireless communication modules
Ethernet Communication	Configuration-dependent wired network integration
Bluetooth Printing	Optional support
Alarm Accessories	Audible/visual warning accessories

11. Request a Quotation for JW-501-NOISE

Looking for an industrial explosion-proof noise monitoring instrument for your project?

JW-IoT can discuss configuration requirements for industrial sound level measurement, signal output selection, alarm functions and monitoring-system integration.

When requesting a quotation, please specify the installation environment, hazardous-area classification, preferred communication interface, alarm requirements and quantity.

Contact JW-IoT for product specifications, configuration confirmation and project pricing.

Website: www.jw-iot.com

FAQ

Q

1.What is an explosion-proof noise monitoring instrument?

A

An explosion-proof noise monitoring instrument is designed to measure environmental sound levels while incorporating an explosion-protection concept for use in applicable hazardous environments.
The JW-501-NOISE uses an Ex d IIC T6 Gb design classification. Installation eligibility depends on the actual area classification and applicable certification requirements.
Q

2. What is the measurement range of the JW-501-NOISE?

A

The instrument has a specified measurement range of 30–130 dB, 0.1 dB resolution and accuracy of ≤±0.2 dB.
Q

3.Does the instrument support RS485 communication?

A

Yes. RS485 is one of the available wired interfaces, alongside RS232 and analog signal outputs. The exact communication protocol and register documentation should be confirmed before integration.
Q

4. Can the instrument trigger alarms when noise exceeds a preset threshold?

A

Yes. The product information lists three-level noise alarms, audible and visual warnings, voice alarms and optional relay outputs.
Alarm thresholds can be configured according to application requirements.
Q

5. Is the JW-501-NOISE suitable for outdoor installation?

A

The instrument has an IP67 protection rating and an operating temperature specification of -20°C to +50°C.
Outdoor installations must also consider mounting, cable entry sealing, corrosion exposure and applicable explosion-proof requirements.
Q

6. Can it connect to a remote noise monitoring system?

A

Yes. Depending on the configured communication interfaces and supporting equipment, the instrument can provide data to industrial gateways, controllers and monitoring platforms.
Q

7. Can the instrument store historical noise data?

A

An optional storage configuration supports more than 100,000 records, with adjustable storage intervals.
Q

8. Is the JW-501-NOISE ATEX or IECEx certified?

A

The provided documentation identifies an Ex d IIC T6 Gb marking and a CNEx certificate number. It does not establish ATEX or IECEx certification.
The required certificate documents should be reviewed before specifying the instrument for a particular country or hazardous-area project.
Q

9. What is the difference between JW-501-NOISE and a regular industrial noise sensor?

A

The JW-501-NOISE emphasizes explosion-proof construction, an integrated display, alarm functions and optional data storage.
For applications that only require a compact sound level sensor with industrial signal outputs, the Industrial Noise Sensor 30–130 dB may be a more appropriate alternative.