Intrinsically Safe Multi Parameter Gas Monitor for Mine

Introduction of Intrinsically Safe Multi Parameter Gas Monitor for Mine

The JD4(A) multi-parameter gas detection alarm is a mine-used intrinsically safe and flameproof monitor certified to mainstream national and industrial standards, including GB/T 3836 series and AQ/T 6207-2007. Tailored for coal mine underground tunnels and hazardous mining environments, it simultaneously detects four core gases: methane (CH4), oxygen (O2), carbon monoxide (CO), and carbon dioxide (CO2).

 

Built for harsh mining conditions, the device operates stably at 0℃ to 40℃, relative humidity ≤98% (25℃), and atmospheric pressure of 80kPa to 116kPa, adapting to windy and dusty underground scenarios. With an IP68 protection grade, it resists dust and water erosion. Compact and lightweight (259.5g with back clip, 115×63×41mm), it supports both portable handheld use for patrol staff and fixed on-site monitoring, serving as a core safety device for mine gas hazard prevention.

 

Feature of Intrinsically Safe Multi Parameter Gas Monitor for Mine

1) Accurate & Comprehensive Detection: Equipped with high-precision independent sensors, the monitor delivers stable detection across full ranges: CH4 (0.00–4.00%), O2 (0.0–30.0%), CO (0–1000ppm), and CO2 (0.00–5.00%). It features graded detection errors and fast response times, with maximum response duration within 45 seconds, ensuring real-time and reliable gas concentration data.

 

2) Multi-level Intelligent Alarm System: It supports two-stage adjustable alarm thresholds for all detected gases with ultra-low alarm errors. The triple alarm mechanism of sound (≥80dB), light (visible beyond 20m in darkness), and vibration provides obvious on-site reminders. Optional fall detection and 100m visual-distance linkage alarm realize regional hazard linkage warning, plus one-touch manual emergency alarm for active risk disposal.

 

3) Humanized & Durable Design: The high-definition LCD screen displays gas concentration, temperature, humidity, time, and battery level in real time. It supports customizable screen-off time, data storage interval, password lock, and calibration reminder functions to meet diversified on-site management needs. The 1120mAh intrinsic safety battery ensures over 10 hours of continuous operation, with safe ground-only charging and optional 20-unit cascaded charging for efficient team charging.

 

4) Strict Safety & Easy Maintenance: Certified with Exdb ib I Mb mine explosion-proof mark, all circuit components adopt intrinsic safety design to avoid explosion risks. It supports one-key zero calibration and standard gas calibration, with intuitive fault judgment. Complete data export function facilitates mine safety record archiving and inspection.

 

Detail photos of Intrinsically Safe Multi Parameter Gas Monitor for Mine

 

Product parameters of Intrinsically Safe Multi Parameter Gas Monitor for Mine

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 Intrinsically Safe Multi Parameter Gas Monitor for Mine

Q1: Is the monitor available for underground charging?

A1: Absolutely not. To ensure explosion-proof safety, all charging operations must be completed in safe ground areas with the dedicated X61E power adapter. Underground charging and battery replacement are strictly prohibited.

 

Q2: How to solve inaccurate detection data?

A2: Inaccurate readings are mainly caused by zero drift or expired calibration. Perform zero calibration in clean air (for CH4/CO) or pure nitrogen (for O2/CO2). If deviation persists, complete standard gas calibration. Replace aging sensors if calibration fails.

 

Q3: What causes short working hours and failure to power on?

A3: Short battery life or startup failure is mostly due to insufficient battery power. Fully charge the device for 4–5 hours via the dedicated base charger. If the problem recurs, the battery is aging and needs factory replacement.

 

Q4: Are linkage and fall detection functions standard?

A4: These two functions are optional configurations. When enabled, the device can synchronize alarm information with nearby monitors and automatically identify staff falls to trigger auxiliary safety alarms.

 

Q5: What is the warranty policy?

A5: The main unit enjoys a 12-month warranty, and the battery has a 6-month warranty for non-human damage. Unauthorized disassembly, man-made damage, and failure to follow operating specifications will void warranty services.