Portable Multi Gas Detector for Underground Mining

Product Description

Introduction of Portable Multi Gas Detector for Underground Mining

The JD4(A) Portable Multi-Gas Detector is a mine-certified intrinsically safe and flameproof device tailored for underground mining operations, fully compliant with international and industrial safety standards. It enables continuous real-time monitoring of four critical gases: methane (CH4), oxygen (O2), carbon monoxide (CO), and carbon dioxide (CO2), covering full-range concentration detection for underground mining environments.

Designed for harsh mining conditions, the detector adapts to temperatures of 0℃–40℃, humidity up to 98%, and wind speeds ≤8m/s, perfectly fitting the complex working scenarios of Southeast Asian coal and metal mines. It delivers accurate gas concentration data and triggers immediate safety alerts, serving as an essential personal safety tool for mine operators and supervisors for both portable and fixed on-site monitoring.

Feature of Portable Multi Gas Detector for Underground Mining

1) Precise & Reliable Detection: Adopting high-precision sensors, the device features calibrated detection ranges and minimal errors for all four gases. It offers fast response times, with maximum 45s response for CO detection, ensuring timely capture of gas concentration changes. Dual-level adjustable alarm thresholds meet diverse mine safety standard requirements across Southeast Asian regions.

2) All-Round Safety Alert System: Equipped with triple sound, light, and vibration alarms, it ensures effective warnings even in noisy, dim underground environments, with an 80dB+ alarm sound and 20-meter visible alarm light. Optional fall detection and 100m long-distance linkage alarm functions enable group operation safety linkage, greatly improving team emergency response capabilities. Manual one-click emergency alarm further enforces on-site safety guarantees.

3) Durable & Site-Adaptive Design: Boasting IP68 high-level dustproof and waterproof protection, the device withstands underground dust, moisture, and accidental collisions. Weighing only 259.5g with a compact body, it is lightweight for long-time portable use. The built-in high-capacity intrinsic safety battery supports over 10 hours of continuous operation, meeting full-shift mining work demands.

4) Practical & Intelligent Functions: It supports real-time temperature and humidity display, regular calibration reminders, data storage and export, and customizable screen-off time and password locks. The cascade charging design allows 20 devices to charge simultaneously, reducing equipment maintenance costs and improving management efficiency for mining enterprises.

Detail photos of Portable Multi Gas Detector for Underground Mining

Product parameters of Portable Multi Gas Detector for Underground Mining

Item	Parameters
Detectable Gas Types	Methane (CH4) Oxygen (O2) Carbon Monoxide (CO) Carbon Dioxide (CO2)
Detection Range	CH4: (0.00～4.00)%CH4 O2: (0.0～30.0)%O2 CO: (0～1000)×10 CO CO2: (0.00～5.00)%CO2
Basic Accuracy Error	CH4: ±0.10%CH4 (0.00～1.00%)±10% of true value (1.00～3.00%)±0.30%CH4 (3.00～4.00%) O2: ±0.5%O2 (0.0～5.0%)±3%FS (5.0～30.0%) CO: ±2% (0～20×10 CO)±4% (＞20～100×10 CO)±5% of true value (＞100～500×10 CO)±6% of true value (＞500～1000×10 CO) CO2: ±0.10% (0.00～0.50%)±(0.05 + 5% of true value) (0.50～5.00%)
Alarm Performance	Alarm Performance
Alarm Signal	Three-dimensional alarm: sound, light and vibration
Alarm Sound Intensity	≥80dB(A) (1 meter away from the buzzer)
Alarm Visibility (Light)	Visible distance ≥20m in dark environment
Two-Stage Alarm Threshold (Full range adjustable)	CH4: Factory primary alarm point: 1.00%CH4; Secondary alarm point:1.50%CH4 O2: Factory primary alarm point: 18.0%O2; Secondary alarm point: 16.0%O2 CO: Factory primary alarm point: 24×10-6 CO; Secondary alarm point: 48×10-6 CO CO2: Factory primary alarm point: 1.0%CO2; Secondary alarm point: 1.5%CO2
Alarm Error	CH4: ±0.05%CH4 O2: ±0.3%O2 CO: ±1×10 CO CO2: ±0.04%CO2
Response Time (Flow rate: 250mL/min)	CH4: ≤20s O2: ≤35s CO: ≤45s CO2: ≤30s
Main Functions	Main Functions
Fall Alarm (Optional)	The detector can monitor the fall status of the wearer and display the fall icon under normal gas concentration conditions. It can also trigger fall detection when gas concentration exceeds the limit. With linkage alarm enabled, fall alarm signals will be automatically sent to detectors within 100 meters (visible distance).
Linkage Alarm (Optional)	When enabled, linkage alarm is available within 100 meters (visible distance). Frequency range: 2400～2525MHz; Maximum wireless transmit power: ≤20dBm.
Emergency Alarm	Long press the emergency alarm button to activate the manual alarm interface and actively send alarm signals to surrounding detectors.
Calibration Reminder	Once enabled, the detector will pop up an over-calibration reminder on startup when the calibration period expires.
Temperature & Humidity Detection	Real-time temperature and humidity display on the monitoring interface.
Password Setting	4-digit password available for menu access and shutdown permission; factory default: disabled.
Factory Reset	Clear stored data and custom settings to restore factory defaults.
Screen-off Time	Adjustable: 0 (always on) or 1～20 minutes.
Data Storage Interval	Customizable interval for real-time data collection and storage.
Time Setting	Adjustable year, month, day, hour and minute.
Data Export	Supports exporting dated alarm data via the dedicated charging base.
Cascade Charging (Optional)	The charging base supports cascade connection for up to 20 units, enabling simultaneous charging of 20 detectors with a single adapter.
Power Supply	Power Supply
Continuous Working Time	≥10 hours under normal working conditions*Subject to operating status, alarm frequency and activation of indicator lights & reminder functions
Battery Specification	Intrinsic safety power supply: 2 parallel lithium manganate batteries, Model: QHPW 674048, 1120mAhMaximum open-circuit voltage (Uo): 4.3VMaximum output current (Io): 2.1ARated working voltage (Ue): 3.7VEquipped with two-stage protection circuit and encapsulated with epoxy resin to form an intrinsic safety battery assembly.
Dimension & Weight	Dimension & Weight
Overall Dimension	Approx. 115.0mm×63.0mm×41.0mm (including back clip)
Weight	Approx. 259.50g (including back clip)
Protection Grade	Protection Grade
IP Rating	IP68 (1.1m water depth, 40 minutes duration)

FAQ about Portable Multi Gas Detector for Underground Mining

Q1: Is the detector suitable for Southeast Asian underground mine environments?

A1: Yes. It adapts to high temperature, high humidity and high wind speed conditions common in Southeast Asian mines, with professional mine explosion-proof certification (Exdb ib I Mb) and complete industrial standard compliance, fully meeting local mining safety supervision requirements.

Q2: How to ensure detection accuracy during long-term use?

A2: The device supports manual zero calibration and professional gas calibration, with adjustable standard gas concentration parameters. It is equipped with a calibration reminder function to avoid detection deviations caused by overdue calibration, ensuring long-term stable and accurate data.

Q3: What are the safety restrictions for operation?

A3: To ensure operational safety, charging and battery replacement must be completed in ground safe areas, and no modification of intrinsic safety circuit components is allowed. Specialized technicians shall conduct daily maintenance and calibration.

Q4: What is the after-sales warranty policy?

A4: The main unit enjoys a 12-month warranty, and the battery has a 6-month warranty for non-human damage. Professional fault analysis and after-sales technical support are provided to solve equipment operation problems efficiently.

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Portable Multi Gas Detector for Underground Mining

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