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| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Constant-Temperature Bath |
| Circulation Mode | Internal & External Circulation |
| Bath Volume | 20 L |
| Temperature Range | Ambient +5°C to 160°C |
| Temperature Stability | ±0.5°C |
| Cooling Interface | Integrated Water-Cooling Inlet/Outlet |
| Control Method | PID Digital Temperature Control |
| Safety Features | Over-Temperature Alarm, Over-Current Protection, Overload Protection |
| System Design | Fully Sealed Closed-Loop Circulation |
| Display | LCD Panel with Real-Time Temperature Readout |
| Exhaust Valve | Integrated for Fluid Top-Up |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | DHJF-8002 Vertical |
| Instrument Type | Constant-Temperature Bath |
| Circulation Mode | Internal Circulation |
| Bath Volume | 2 L |
| Temperature Range | −80 °C to +10 °C |
| Temperature Stability | ±2 °C |
| Rated Power | 1020 W |
| Voltage/Frequency | 220 V~, 50 Hz |
| Refrigerants | R404A / R23 |
| Cooling Capacity | 200 W at −40 °C, 120 W at −60 °C, 60 W at −80 °C |
| Magnetic Stirring Power | 50 W |
| Stirring Speed | 100–1000 rpm |
| Opening Diameter | Ø140 mm |
| Bath Dimensions | Ø160 × 105 mm (D × H) |
| Max Flask Capacity | 500 mL |
| Bath Material | 304 Stainless Steel |
| Overall Dimensions | 380 W × 450 D × 860 H mm |
| Net Weight | 60 kg |
| Ambient Operating Conditions | 5–35 °C, ≤70% RH |
| Safety Protections | Dry-run prevention (heating models), overcurrent, overtemperature, and delayed startup protection |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | DHJF-1050 |
| Instrument Type | Constant-Temperature Bath |
| Circulation Mode | Internal Circulation |
| Temperature Control | Refrigeration & Heating |
| Bath Volume | 50 L |
| Temperature Range | −100 °C to −60 °C |
| Temperature Stability | ±2 °C |
| Power Supply | 3-phase, 380 V, 50 Hz |
| Cooling Capacity | 700 W at −60 °C / 580 W at −80 °C / 420 W at −100 °C |
| Max Flask Capacity | 20 L |
| External Dimensions (L×W×H) | 1340 × 820 × 1310 mm |
| Net Weight | 265 kg |
| Construction | Cold-Rolled Steel with Electrostatic Powder Coating |
| Bath Vessel | 304 Stainless Steel + High-Molecular Corrosion-Resistant Liner |
| Display | Digital LED with Keypad Input |
| Brand | Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Circulating Constant-Temperature Bath |
| Circulation Mode | External Circulation |
| Temperature Control | Refrigeration & Heating Dual-Mode |
| Bath Volume | 5 L |
| Temperature Range | –80 °C to +99 °C |
| Temperature Stability | ±0.2 °C |
| Total Power Input | 3260 W |
| Power Supply | 220 V~, 50 Hz |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | SY-20 |
| Instrument Type | Water/Oil Bath |
| Circulation Mode | Internal & External |
| Temperature Control | Heating-Only |
| Bath Volume | 20 L |
| Temperature Range | RT + 5 °C to 200 °C |
| Temperature Stability | ±0.5 °C |
| Power Supply | 220–240 V, 50 Hz |
| Heating Power | 2450 W |
| Circulation Pump Power | 280 W |
| Rated Flow Rate | 30 L/min |
| Maximum Pressure | 1 bar |
| External Port Size | 3/4" |
| Bath Material | SUS304 Stainless Steel |
| Opening Dimensions | Φ350 × 220 mm |
| Overall Dimensions (W×D×H) | 505 × 420 × 735 mm |
| Net Weight | 28 kg |
| Brand | The Great Wall |
|---|---|
| Model | DHJF-2005A |
| Type | Circulating Constant-Temperature Bath with Integrated Magnetic Stirrer |
| Temperature Range | −20 °C to 99 °C |
| Temperature Stability | ±0.2 °C |
| Display Resolution | 0.01 °C |
| Bath Volume | 5 L (working volume) |
| External Circulation Flow Rate | 20 L/min |
| Maximum Pressure | 0.4 bar |
| Refrigerant | R404A |
| Cooling Capacity | 300 W at −20 °C, 420 W at 0 °C, 520 W at 20 °C, 900 W at 90 °C |
| Heating Power | 1500 W |
| Total Power Consumption | 2210 W |
| Stirring Motor Power | 50 W |
| Stirring Speed Range | 100–1000 rpm |
| Bath Material | 304 Stainless Steel |
| Opening Diameter | Ø210 mm |
| External Port | Rc1/2 |
| Max Flask Capacity Supported | 2000 mL |
| Dimensions (W×D×H) | 385×560×735 mm |
| Net Weight | 55 kg |
| Ambient Operating Conditions | 5–35 °C, ≤70% RH |
| Power Supply | 220–240 V~, 50 Hz |
| Safety Protections | Overtemperature, overcurrent, overload, leakage current, overpressure, dry-run prevention (for heating models) |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | SY-200-200 |
| Circulation Mode | External Circulation |
| Temperature Control | Heating-Only |
| Temperature Range | Ambient +5 °C to 200 °C |
| Temperature Stability | ±0.5 °C |
| Total Power Consumption | 24.75 kW |
| Supply Voltage | 3-phase, 380 V, 50 Hz |
| Pump Power | 750 W |
| Max Flow Rate | 150 L/min |
| Max Pressure | 2.5 bar |
| Heat Transfer Fluid | Thermal Oil |
| Cooling Coil | Integrated water-cooled coil for auxiliary temperature regulation |
| Reservoir Capacity | 25 L |
| External Port Connection | R21 |
| IP Rating | IP20 |
| Pollution Degree | 2 |
| Dimensions (W×D×H) | 610 × 940 × 1590 mm |
| Weight | 240 kg |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | DHJF-1250 |
| Instrument Type | Constant-Temperature Bath |
| Circulation Mode | Internal Circulation |
| Temperature Control | Refrigeration & Heating |
| Bath Volume | 50 L |
| Temperature Range | −120 °C to −60 °C |
| Temperature Stability | ±2 °C |
| Power Supply | 3-phase, 380 V, 50 Hz |
| Refrigeration Capacity | 700 W at −60 °C / 580 W at −80 °C / 420 W at −100 °C / 125 W at −120 °C |
| Max Flask Capacity | 20 L |
| Overall Power Consumption | 4876 W |
| External Dimensions (L×W×H) | 1340 × 820 × 1310 mm |
| Net Weight | 265 kg |
| Tank Material | 304 Stainless Steel + Polymer Anti-Corrosion Lining |
| Display | Digital LED with Keypad Input |
| Cabinet Finish | Cold-Rolled Steel with Electrostatic Powder Coating |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Equipment Type | Circulating Constant-Temperature Bath |
| Circulation Mode | Internal & External Circulation |
| Temperature Control | Dual-mode (Refrigeration & Heating) |
| Bath Volume | 10 L |
| Temperature Range | −30 °C to +99 °C |
| Temperature Stability | ±0.5 °C |
| Power Supply | 220 V~, 50 Hz |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | DHJF-4002 |
| Instrument Type | Constant-Temperature Bath |
| Circulation Mode | External Circulation |
| Temperature Control | Refrigeration & Heating Dual-Mode |
| Bath Volume | 2 L |
| Temperature Range | −40 °C to +99 °C |
| Temperature Stability | ±0.2 °C |
| Total Rated Power | 820 W |
| Heating Power | 300 W |
| Magnetic Stirring Power | 50 W |
| Stirring Speed | 100–1000 rpm |
| Refrigerant | R404A |
| Cooling Capacity (W) | 290 @ 10 °C, 200 @ 0 °C, 120 @ −10 °C, 80 @ −20 °C, 50 @ −30 °C, 10 @ −40 °C |
| Input Voltage | 220 V~, 50 Hz |
| Opening Diameter | Ø140 mm |
| Bath Dimensions | Ø160 × 105 mm (D × H) |
| Max Flask Capacity | 500 mL |
| Bath Material | 304 Stainless Steel |
| Overall Dimensions | 430 W × 470 D × 435 H mm |
| Net Weight | 35 kg |
| Ambient Operating Conditions | 5–35 °C, ≤70% RH |
| Brand | Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Equipment Category | Domestic |
| Model | HX-2015 |
| Instrument Type | Constant-Temperature Bath Circulator |
| Circulation Mode | Internal & External |
| Temperature Control | Refrigeration & Heating |
| Bath Volume | 15 L |
| Temperature Range | −20 °C to +99 °C |
| Temperature Stability | ±0.05 °C |
| Refrigeration Capacity | 370–1200 W |
| Heating Power | 1750 W |
| Flow Rate | 10 L/min |
| Tank Dimensions (L×W×H) | 365 × 245 × 168 mm |
| Overall Dimensions (L×W×H) | 480 × 340 × 780 mm |
| Construction Material | 304 Stainless Steel |
| Control Method | PID Algorithm |
| Display | Digital LED |
| Compressor | Hermetic Air-Cooled Unit (Imported from USA/France) |
| Pump | Dual-Impeller Circulation Pump with Self-Priming Capability |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | SY-20-250D |
| Instrument Type | Constant-Temperature Bath |
| Circulation Mode | Internal & External Loop |
| Temperature Control | Heating-Only |
| Temperature Range | 5–250 °C |
| Temperature Stability | ±0.5 °C |
| Power Supply | 220–240 V~, 50 Hz |
| Maximum Flow Rate | 28 L/min |
| Maximum Pressure | 3.0 bar |
| Circulation Pump Power | 500 W |
| Heating Power | 3 kW |
| Total Power Consumption | 3.5 kW |
| Heat Transfer Fluid Capacity | 9 L |
| External Cooling Interface | R2¾ |
| IP Rating | IP20 |
| Pollution Degree | 2 |
| Dimensions (W×D×H) | 430 × 690 × 1075 mm |
| Weight | 60 kg |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | DHJF-2005 |
| Instrument Type | Constant-Temperature Bath |
| Circulation Mode | Internal & External Circulation |
| Temperature Control | Refrigeration & Heating Dual-Mode |
| Bath Volume | 5 L |
| Temperature Range | −20 °C to 99 °C |
| Temperature Stability | ±0.2 °C |
| Total Rated Power | 2130 W |
| Heating Power | 1500 W |
| Refrigerant | R404A |
| Refrigeration Capacity | 570 W @ 10 °C, 470 W @ 0 °C, 385 W @ −10 °C, 230 W @ −20 °C |
| Pump Flow Rate | 20 L/min |
| Pump Pressure | 0.4 bar |
| Magnetic Stirring Power | 50 W |
| Stirring Speed | 100–1000 rpm |
| Input Voltage | 220 V~, 50 Hz |
| Ambient Operating Temperature | 5–35 °C |
| Bath Material | 304 Stainless Steel |
| External Port Thread | Rc1/2 |
| Opening Diameter | Ø210 mm |
| Bath Dimensions (Ø × H) | 250 × 130 mm |
| Max Flask Capacity Supported | 2000 mL |
| Overall Dimensions (W × D × H) | 385 × 560 × 735 mm |
| Net Weight | 55 kg |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | DHJF-2005A |
| Instrument Type | Constant-Temperature Bath |
| Circulation Mode | Internal & External Circulation |
| Temperature Control | Refrigeration & Heating |
| Bath Volume | 5 L |
| Temperature Range | −20 °C to 99 °C |
| Temperature Stability | ±0.2 °C |
| Temperature Resolution | 0.01 °C |
| Total Power Consumption | 2210 W |
| Heating Power | 1500 W |
| Magnetic Stirring Power | 50 W |
| Stirring Speed | 100–1000 rpm |
| Refrigerant | R404A |
| Cooling Capacity | 300 W at −20 °C, 420 W at 0 °C, 520 W at 20 °C, 900 W at 90 °C |
| Pump Flow Rate | 20 L/min |
| Maximum Backpressure | 0.4 bar |
| Input Voltage | 220 V~, 50 Hz |
| Ambient Operating Temperature | 5–35 °C |
| Relative Humidity | ≤70% |
| Bath Opening Diameter | Ø210 mm |
| Bath Dimensions (Ø × H) | 250 × 130 mm |
| Overall Dimensions (W × D × H) | 385 × 560 × 735 mm |
| Net Weight | 55 kg |
| Safety Protections | Overload, Overcurrent, Overtemperature, Leakage Current, Overvoltage, Dry-run Protection (for heating models) |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | SY-10 |
| Instrument Type | Water/Oil Bath Circulator |
| Circulation Mode | Internal & External Circulation |
| Temperature Control | Heating-Only |
| Bath Volume | 10 L |
| Temperature Range | Ambient +5 °C to 200 °C |
| Temperature Stability | ±0.5 °C |
| Pump Material | High-Temperature Stainless Steel Shielded Pump |
| Bath Tank Material | SUS304 Stainless Steel |
| Control System | PID Digital Controller with LED Display |
| Heating Element | ODM-Sourced Industrial-Grade Heater Compliant with GB Standards |
| Structural Design | Vertical Stand with Castor Wheels |
| External Port Fittings | 3/4" Stainless Steel Insulated Quick-Connect Ports |
| Power Supply | 220–240 V, 50 Hz |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic Instrument |
| Model | DHJF-4010 |
| Instrument Type | Constant-Temperature Bath |
| Circulation Function | External Circulation |
| Temperature Control Mode | Refrigeration & Heating |
| Bath Volume | 10 L |
| Temperature Range | −40 °C to +99 °C |
| Temperature Stability | ±0.2 °C |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Manufacturer |
| Product Category | Domestic |
| Model | DHJF-4005A |
| Instrument Type | Constant-Temperature Bath |
| Circulation Function | External Circulation |
| Temperature Control Mode | Refrigeration & Heating |
| Bath Volume | 5 L |
| Temperature Range | −40 °C to +99 °C |
| Temperature Stability | ±0.2 °C |
| Temperature Resolution | 0.01 °C |
| Total Power Input | 2450 W |
| Heating Power | 1500 W |
| Circulation Pump Power | 100 W |
| Flow Rate | 20 L/min |
| Maximum Pressure | 0.4 bar |
| Magnetic Stirring Power | 50 W |
| Stirring Speed Range | 100–1000 rpm |
| Refrigerant | R404A |
| Cooling Capacity (W) | 1100 @ 90 °C, 720 @ 10 °C, 640 @ −10 °C, 500 @ −20 °C, 310 @ −30 °C, 150 @ −40 °C |
| Power Supply | 220 V AC, 50 Hz |
| Ambient Operating Conditions | 5–35 °C, ≤70% RH |
| External Port | Rc1/2 |
| Opening Diameter | Ø210 mm |
| Bath Dimensions | Ø250 × 130 mm (D × H) |
| Max Flask Capacity Supported | 2000 mL |
| Bath Material | 304 Stainless Steel |
| Overall Dimensions | 385 W × 560 D × 735 H mm |
| Net Weight | 60 kg |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Equipment Category | Domestic |
| Model | HX-1005 |
| Instrument Type | Constant-Temperature Bath Circulator |
| Circulation Mode | Internal & External Loop |
| Temperature Control | Refrigeration & Heating Dual-Mode |
| Bath Volume | 5 L |
| Temperature Range | −5 °C to 99 °C |
| Temperature Stability | ±0.05 °C |
| Temperature Resolution | 0.01 °C |
| Total Power Input | 1.5 kW |
| Power Supply | 220–240 V~, 50 Hz |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Manufacturer |
| Product Category | Domestic |
| Model | DHJF-3010 |
| Instrument Type | Constant-Temperature Bath |
| Circulation Mode | Internal & External |
| Temperature Control | Refrigeration & Heating |
| Bath Volume (L) | 10 |
| Temperature Range (°C) | −30 to 99 |
| Temperature Stability (°C) | ±0.5 |
| Total Power Input (W) | 2400 |
| Voltage/Frequency | 220 V~, 50 Hz |
| Heating Power (W) | 1500 |
| Magnetic Stirring Power (W) | 50 |
| Stirring Speed (rpm) | 100–1000 |
| Refrigerant | R410A |
| Cooling Capacity (W) @ 10°C/0°C/−10°C/−20°C/−30°C | 1700/1250/800/300/150 |
| Pump Flow Rate (L/min) | 20 |
| Pump Pressure (bar) | 0.4 |
| Opening Diameter (mm) | Φ210 |
| Bath Dimensions (mm) | Φ250 × 250 |
| Overall Dimensions (mm) | 395 W × 505 D × 825 H |
| Net Weight (kg) | 60 |
| Ambient Operating Temperature (°C) | 5–35 |
| Ambient Relative Humidity | ≤70% |
| External Circulation Port | 1/2" NPT |
| Brand | Great Wall |
|---|---|
| Model | SY-20-250Ex |
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Constant-Temperature Circulating Bath |
| Circulation Mode | External Circulation |
| Temperature Control | Heating-Only |
| Temperature Range | Ambient +5°C to 250°C |
| Temperature Stability | ±0.5°C |
| Total Power Input | 3250 W |
| Supply Voltage | 3-phase, 380 V, 50 Hz |
| Heat Transfer Fluid | Thermal Oil |
| Safety Certification | ATEX/IECEx-compliant components (explosion-proof heater, circulation pump, and control cabinet) |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | DHJF-2005 |
| Instrument Type | Constant-Temperature Bath |
| Circulation Mode | Internal & External Circulation |
| Temperature Control | Refrigeration & Heating |
| Bath Volume | 5 L |
| Temperature Range | −20 °C to +99 °C |
| Temperature Stability | ±0.2 °C |
| Power Supply | 220 V~, 50 Hz |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Manufacturer |
| Product Category | Domestic |
| Model | SY-50 |
| Instrument Type | Water/Oil Bath |
| Circulation Mode | Internal & External |
| Temperature Control | Heating-Only |
| Bath Volume | 20 L |
| Temperature Range | RT + 5 °C to 200 °C |
| Temperature Stability | ±0.5 °C |
| Brand | Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Equipment Type | Refrigerated/Heating Circulating Bath |
| Bath Volume | 10 L |
| Temperature Range | −30 °C to +99 °C |
| Temperature Stability | ±0.2 °C |
| Temperature Resolution | 0.1 °C |
| Max Pump Flow Rate | 10 L/min |
| Max Pump Pressure | 0.2 bar |
| Heating Power | 1600 W |
| Refrigerant | R404A |
| Input Voltage | 220–240 V~50 Hz |
| Total Power Consumption | 2160 W |
| External Dimensions (W×D×H) | 255 × 490 × 693 mm |
| Net Weight | 55 kg |
| IP Rating | IP20 |
| Pollution Degree | 2 |
| Operating Ambient | 5–35 °C, ≤70% RH |
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | DHJF-1030 |
| Instrument Type | Constant-Temperature Bath |
| Circulation Mode | Internal Circulation |
| Temperature Control | Refrigeration & Heating Combined |
| Bath Volume | 30 L |
| Temperature Range | −100 °C to −60 °C |
| Temperature Stability | ±2 °C |
| Refrigeration Capacity | 620 W at −60 °C, 480 W at −80 °C, 200 W at −100 °C |
| Power Supply | 3-phase, 380 V, 50 Hz |
| Max Flask Capacity | 10,000 mL |
| Tank Dimensions (Ø × H) | 400 × 235 mm |
| Opening Diameter | Ø320 mm |
| Cabinet Material | Cold-Rolled Steel with Electrostatic Powder Coating |
| Overall Dimensions (L×W×H) | 1160 × 800 × 1310 mm |
| Net Weight | 180 kg |
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