CWH600 Intrinsically Safe Mining-Grade Infrared Thermometer
| Origin | Beijing, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (China) |
| Model | CWH600 |
| Price Range | USD 1–1,400 |
| Instrument Type | Portable |
| Temperature Range | −50 °C to 650 °C |
| Basic Accuracy | ±1.5 °C |
| Temperature Resolution | 0.1 °C / 0.1 °F |
| Emissivity Adjustment | 0.10–1.00 (step 0.01) |
| Response Time | <400 ms |
| Laser Aiming | Dual Class II Diode Lasers (λ = 630–670 nm, P<1 mW) |
| Spectral Response | 6–14 µm |
| Distance-to-Spot Ratio | 12:1 |
| Repeatability | ±0.5% of reading or ±1 °C (±1.8 °F) |
| Operating Temperature | −10 °C to 50 °C |
| Storage Temperature | −20 °C to 60 °C |
| Display Units | °C / °F switchable |
| Power Supply | 8.0–10.0 V DC |
| Current Draw | ≤80 mA |
| Enclosure Rating | IP54 |
| Certification | MA Certified (China MSHA-equivalent), Ex ib I Mb Intrinsically Safe Mark, CNEX Test Report No. attached |
Overview
The CWH600 Intrinsically Safe Mining-Grade Infrared Thermometer is an ATEX/IECEx-aligned portable non-contact temperature measurement instrument engineered for hazardous environments in coal mines, underground tunnels, and explosion-prone industrial zones. It operates on the principle of passive infrared radiation detection within the 6–14 µm spectral band—optimized for accurate surface temperature assessment of metallic, oxidized, and composite materials commonly encountered in mining infrastructure, conveyor systems, electrical junction boxes, hydraulic components, and ventilation ducts. Its intrinsically safe design complies with GB 3836.1–2010 (Explosive Atmospheres – Part 1: Equipment – General Requirements) and GB 3836.4–2010 (Intrinsic Safety “ib” protection level for Mining “I Mb” category), ensuring safe operation in methane-air mixtures up to 6.5% volume concentration. The dual-laser targeting system enables precise spatial localization of measurement spots at distances up to 1.2 m (given 12:1 D:S ratio), minimizing operator exposure during routine thermal inspections.
Key Features
- Dual Class II visible laser pointers (630–670 nm, <1 mW) for unambiguous spot identification and alignment verification
- User-configurable high/low temperature alarms (HAL/LAL) with audible and visual alert indicators
- Real-time statistical functions: MAX, MIN, DIF (difference), and AVG (average of up to 20 sequential readings)
- Auto-hold function triggered by stable signal acquisition (<400 ms response time) for reliable single-point capture
- Adjustable emissivity (0.10–1.00 in 0.01 increments) to compensate for varying surface conditions—critical for oxidized steel, rubber belts, and refractory linings
- On-device data storage for up to 20 timestamped measurements, accessible via LCD review without external interface
- Ruggedized housing rated IP54—dust-protected and resistant to water splashes from any direction—suitable for humid, dusty mine galleries
- Wide operational temperature range (−10 °C to 50 °C) and extended storage capability (−20 °C to 60 °C) ensure reliability across seasonal mine site conditions
Sample Compatibility & Compliance
The CWH600 is validated for non-contact surface temperature measurement of conductive and non-conductive solids including but not limited to: motor windings, bearing housings, cable terminations, air compressors, brake drums, and exhaust manifolds. It is unsuitable for transparent media (e.g., glass, quartz), highly reflective untreated metals without emissivity correction, or flames/smoke plumes. All units are supplied with a valid MA safety certification (Ministry of Emergency Management, PRC), CNEX Ex ib I Mb explosion-proof test report, and factory calibration certificate traceable to NIM (National Institute of Metrology, China). While not FDA 21 CFR Part 11 or ISO/IEC 17025 accredited per se, its documented uncertainty budget (±1.5 °C at 23 °C ambient) supports use in preventive maintenance programs aligned with ISO 18436-2 (Condition Monitoring and Diagnostics of Machines) and GB/T 19870 (Industrial Infrared Thermography).
Software & Data Management
The CWH600 operates as a standalone field instrument with no embedded Bluetooth, USB, or wireless connectivity. Measurement records (20 entries) are retained in volatile memory and displayed directly on the backlit LCD screen. No proprietary software, drivers, or cloud synchronization is required or supported. Data export is manual—users transcribe values into CMMS (Computerized Maintenance Management Systems) such as IBM Maximo or SAP PM via standard reporting templates. Audit trails rely on operator logbooks; no electronic audit trail or user authentication is implemented, consistent with its role as a Level 1 thermographic screening tool under ISO 18436-7 guidelines.
Applications
- Predictive maintenance of belt conveyor drive motors and idler rollers
- Thermal verification of explosion-proof enclosures and flameproof junction boxes
- Monitoring of ventilation fan bearings and gearbox surfaces
- Hot-spot detection on coal crusher feed chutes and dust extraction ductwork
- Validation of fire suppression system component temperatures pre- and post-activation
- Periodic checks of battery charging cabinets and UPS backup systems in underground substations
FAQ
Is the CWH600 certified for use in gassy coal mines?
Yes—it holds the MA safety mark (Certificate No. MAA220001) and CNEX Ex ib I Mb certification, permitting use in Zone 0/1 methane environments per GB 3836 standards.
Can emissivity be calibrated in-field for specific materials?
Yes—emissivity is fully adjustable from 0.10 to 1.00 in 0.01 steps using the dedicated keypad; reference tables for common mining materials (e.g., rusted steel: 0.75, aluminum oxide: 0.82) are included in the manual.
Does it support data transfer to PCs or mobile devices?
No—data must be manually recorded; the device has no serial, USB, or wireless interface.
What is the maximum measurable distance for a 10-mm target?
At 12:1 distance-to-spot ratio, a 10-mm spot size corresponds to a maximum working distance of 120 mm; for larger targets (e.g., 50 mm), measurement may extend to 600 mm while maintaining accuracy.
Is battery power included or external?
The CWH600 requires an external 8.0–10.0 V DC power source—typically supplied via intrinsically safe miner’s lamp battery pack or compatible field power module; no internal rechargeable battery is integrated.
