2025/11/27
With a deep commitment to the global market, Shanghai Dengsheng Instruments has earned international acclaim for its quality.








Explosion-proof high-low temperature and humidity cycling test chambers are essential equipment for aerospace, automotive manufacturing, naval armaments, electronics, electrical engineering, and instrumentation industries. They are used to evaluate the performance metrics of materials and components employed in these sectors under varying environmental conditions, including high and low temperatures, high-low temperature humidity cycles, and alternating high-low temperature humidity cycles. Primarily, it assesses the thermal resistance, cold resistance, dry resistance, and moisture resistance of products within these sectors. Examples include testing silicone for melting points and cold resistance; evaluating the stability of electronic and electrical products under extreme environmental conditions; accelerating the ageing of insulating materials and polymers; and examining materials for cracking, embrittlement, or deformation under extreme conditions.
1. The product complies with IIB explosion-proof standards and is suitable for hazardous locations with explosive gas mixtures in temperature classes T1 to T4. It achieves an explosion-proof rating of IIB T4. The product has been certified as compliant by the ****** Electrical Safety Quality Inspection and Testing Centre and holds a valid ********* explosion-proof certification;
2. The electrical control system employs a composite explosion-proof technology combining flameproof and encapsulated designs. The operating switch is a passive switch that generates no mechanical sparks during operation, ensuring safe and reliable use. Sensors are equipped with external safety barriers for explosion-proof isolation;
3. The explosion-proof digital temperature controller features a menu-driven interface with a 7-inch touchscreen. It includes a standard auto-lock screen function to prevent accidental operation; A single screen displays set temperature, operating temperature, constant temperature duration, heating status, and other information, ensuring straightforward operation. The microprocessor-based PID control system delivers precise temperature regulation with minimal fluctuation;
4. The intelligent microprocessor temperature and humidity control system incorporates PID logic operations. Based on computational results, it automatically corrects temperature and humidity deviations to achieve precise control;
5. Incorporates a scheduled start function with multiple timing modes: forward countdown, reverse countdown, constant temperature timing, and start-up timing. Timing units are selectable in minutes or hours;
6. Core components (refrigeration cycle) utilise imported brand compressors and circulation fans. The compressor employs cast-sealed explosion-proof technology for safety and reliability. Utilises fluorine-free, environmentally friendly refrigerant to foster a healthy laboratory environment;
7. The internal air circulation system employs a high-temperature resistant, low-noise explosion-proof axial fan for forced circulation. The refrigeration system utilises a classic arrangement proven stable through years of market testing, ensuring safety and reliability;
8. Incorporates the internationally favoured internal humidification method, offering superior temperature and humidity stability compared to external humidification. Features internationally renowned explosion-proof humidity sensors achieving precision at advanced global standards; includes real-time water tank level monitoring with automatic replenishment functionality;
9. Automatic parameter saving during emergencies with power-on recovery functionality. Equipped with sensor self-diagnostics, over-temperature, and fault alarm capabilities;
10. Inner chamber constructed from 304 mirror-finish stainless steel with rounded corner design. Outer casing utilises premium cold-rolled steel plate with electrostatic powder coating for durable, anti-static finish;
11. Magnetic seal door for effortless opening and superior sealing; adjustable shelves optimise space utilisation;
12. Ergonomic design incorporates a standard 50mm diameter test port for external power or signal cables.
| Model | HLIS-0100ET | HLIS-0150E | HLIS-0225ET | HLIS-0408ET | |
| Explosion-proof rating | IIET4 | ||||
| Temperature range | -40~150 ℃ | ||||
| Temperature resolution | 0.1℃ | ||||
| Temperature fluctuation | ±1℃ | ||||
| Temperature deviation | ±2℃ | ||||
| Heating rate | 1~3c/min | ||||
| Cooling rate | 0.71℃/in | ||||
| Humidity range | 30~95RH | ||||
| Humidity resolution | 1%RH | ||||
| Humidity fluctuation | 士3KRH | ||||
| Refrigerant | DuPont Fluorine-Free Refrigerant | ||||
| Power supply voltage | AC220V/15/20/25A | AC3B0V/12/18/20A | AC380V/12/18/22A | ||
| Chamber material | SUS304 stainless steel | ||||
| Door seal material | Double-layer seal (premium silicone customised for resistance to ozone, low temperatures and ageing) | ||||
| Safety features | Overcurrent, overvoltage, phase failure, earth fault, electric shock protection *Overtemperature alarm* Compressor overcurrent, overvoltage, overtemperature protection | ||||
| Standard accessories | Observation window, test port, safety device | ||||
| Chamber dimensions (mm) | 500*400*500 | 500*500*600 | 600*500*750 | 800*500*850 | |
| External dimensions (m) | 1020*1050*1450 | 1020*1120*1500 | 1110*1200*1600 | 1300*1230*1750 | |
| Volume | 100L | 150L | 225L | 408L | |
| Power consumption | 3.5/4.5/5.5XW | 3.5/4.5/5.5KT | 6/6.8/8XW | 6/7/8.5KW | |
| Net weight | 186XG | 193KG | 216G | 286KG | |
1. GB/T 3836.1-2021 Explosive Atmospheres - Part 1: Equipment - General Requirements
2. GB/T 3836.2-2021 Explosive Atmospheres - Part 2: Equipment Protected by Flameproof Enclosures ‘d’
3. GB/T 3836.9-2021 Explosive Atmospheres - Part 9: Equipment Protected by Encapsulation ‘m’
4. GB/T 10586-2006 Technical Conditions for Humidity and Heat Test Chambers
5. GB/T 5170.2-1996 Methods for Verification of Basic Parameters of Environmental Test Equipment for Electrical and Electronic Products - Temperature Test Equipment
6. GB/T 2423.1-2008 Environmental testing for electrical and electronic products - Part 2: Test methods - Test A: Low temperature
7. GB/T 2423.4-2008 Environmental testing for electrical and electronic products - Part 2: Test methods - Test Db: Alternating humidity and heat (12 h + 12 h cycle).
1. Over-temperature alarm
2. Overcurrent and overload protection
3. Rapid fuse
4. Earth leakage protection
5. Phase loss protection
6. Earth leakage circuit breaker
7. Low water level protection
Products provided by famous enterprises are deeply trusted by users.
Shanghai Dengsheng Instrument Manufacturing Co., Ltd. is a high-tech enterprise integrating R&D, production, sales, and service. We specialize in the manufacture of high-end laboratory equipment, including ovens, incubators, industrial furnaces, and environmental test chambers.
We boast an 8,000-square-meter modern production facility, a dedicated R&D team, 23 national patents, and ISO-9001 quality management system certification. Our solutions are widely used in cutting-edge fields such as aerospace, semiconductors, biomedicine, automotive, and new materials. We have established in-depth partnerships with top universities and industry leaders, and our products are exported to many countries and regions around the world.
Adhering to the principles of "Integrity, Innovation, and Win-Win," we are committed to becoming your trusted partner with reliable quality and dedicated service.
2025/11/27
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