Empowering Scientific Discovery

Zhengzhou Great Wall Scientific Industrial & Trading Co., Ltd.

Categories
  • All
  • Favorite
  • Popular
  • Most rated
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Instrument TypeConstant-Temperature Bath
Circulation ModeInternal & External Circulation
Bath Volume20 L
Temperature RangeAmbient +5°C to 160°C
Temperature Stability±0.5°C
Cooling InterfaceIntegrated Water-Cooling Inlet/Outlet
Control MethodPID Digital Temperature Control
Safety FeaturesOver-Temperature Alarm, Over-Current Protection, Overload Protection
System DesignFully Sealed Closed-Loop Circulation
DisplayLCD Panel with Real-Time Temperature Readout
Exhaust ValveIntegrated for Fluid Top-Up
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
ModelDHJF-8002W
TypeHorizontal stirred reaction bath with integrated refrigeration and heating
Temperature Range−80 °C to +10 °C
Temperature Stability±2 °C
Bath Capacity2 L
RefrigerantsR404A / R23
Cooling Capacity200 W at −40 °C, 120 W at −60 °C, 60 W at −80 °C
Heating FunctionYes (with dry-run protection)
Magnetic Stirring Power50 W
Stirring Speed100–1000 rpm
Bath Opening DiameterØ140 mm
Bath Internal DimensionsØ160 mm × 105 mm depth
Max Vessel Capacity500 mL
Bath Material304 stainless steel
Overall Dimensions (W×D×H)410 × 610 × 495 mm
Net Weight68 kg
Power Supply220 V~, 50 Hz
Ambient Operating Conditions5–35 °C, ≤70% RH
Safety ProtectionsDelayed startup, overcurrent, overtemperature, dry-run (heating mode only)
Added to wishlistRemoved from wishlist 0
Add to compare
BrandGreat Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelDL30-2500
Cooling Capacity (W)6000 @ 0°C
Temperature Range (°C)−30 to +5
Temperature Stability (°C)±2
Ambient Temp. Range (°C)5–35
Ambient Humidity (% RH)≤70%
Power Supply3-phase, 380 V, 50 Hz
RefrigerantR404A (non-CFC, ozone-friendly)
Reservoir Volume (L)40
Pump Flow Rate (L/min)30
Max. System Pressure (bar)1
External Port Size3/4" BSP/Female NPT
Reservoir MaterialSUS304 stainless steel
Dimensions (W×D×H, mm)650 × 1055 × 1070
Net Weight (kg)195
CompressorTecumseh (original imported hermetic piston type)
CondenserAir-cooled finned-tube with oxygen-free copper spiral tubing
EvaporatorFully brazed plate heat exchanger (AISI 316 stainless steel plates, design temp. −160 to +200°C)
Dryer-FilterDanfoss DML series with 3A molecular sieve core
Expansion ValveDanfoss serviceable thermostatic expansion valve (adjustable superheat)
Circulation PumpHigh-performance stainless steel centrifugal pump (leak-proof at low temperatures)
Control SystemMicroprocessor-based digital controller with Chinese-language UI (fully programmable setpoints, real-time monitoring)
Safety ProtectionsPhase sequence detection, delayed start, overcurrent, overtemperature, ground fault, and high-pressure cut-off
Enclosure IP RatingIP44
System TypeHermetically sealed closed-loop circulation
Integrated FeaturesLiquid level indicator, system pressure gauge, particulate filter, refrigerant charge monitoring
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Product CategoryDomestic
ModelDHJF-8002 Vertical
Instrument TypeConstant-Temperature Bath
Circulation ModeInternal Circulation
Bath Volume2 L
Temperature Range−80 °C to +10 °C
Temperature Stability±2 °C
Rated Power1020 W
Voltage/Frequency220 V~, 50 Hz
RefrigerantsR404A / R23
Cooling Capacity200 W at −40 °C, 120 W at −60 °C, 60 W at −80 °C
Magnetic Stirring Power50 W
Stirring Speed100–1000 rpm
Opening DiameterØ140 mm
Bath DimensionsØ160 × 105 mm (D × H)
Max Flask Capacity500 mL
Bath Material304 Stainless Steel
Overall Dimensions380 W × 450 D × 860 H mm
Net Weight60 kg
Ambient Operating Conditions5–35 °C, ≤70% RH
Safety ProtectionsDry-run prevention (heating models), overcurrent, overtemperature, and delayed startup protection
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Product CategoryDomestic
ModelDHJF-1050
Instrument TypeConstant-Temperature Bath
Circulation ModeInternal Circulation
Temperature ControlRefrigeration & Heating
Bath Volume50 L
Temperature Range−100 °C to −60 °C
Temperature Stability±2 °C
Power Supply3-phase, 380 V, 50 Hz
Cooling Capacity700 W at −60 °C / 580 W at −80 °C / 420 W at −100 °C
Max Flask Capacity20 L
External Dimensions (L×W×H)1340 × 820 × 1310 mm
Net Weight265 kg
ConstructionCold-Rolled Steel with Electrostatic Powder Coating
Bath Vessel304 Stainless Steel + High-Molecular Corrosion-Resistant Liner
DisplayDigital LED with Keypad Input
Added to wishlistRemoved from wishlist 0
Add to compare
BrandGreat Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Instrument TypeCirculating Constant-Temperature Bath
Circulation ModeExternal Circulation
Temperature ControlRefrigeration & Heating Dual-Mode
Bath Volume5 L
Temperature Range–80 °C to +99 °C
Temperature Stability±0.2 °C
Total Power Input3260 W
Power Supply220 V~, 50 Hz
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Product CategoryDomestic
ModelSY-20
Instrument TypeWater/Oil Bath
Circulation ModeInternal & External
Temperature ControlHeating-Only
Bath Volume20 L
Temperature RangeRT + 5 °C to 200 °C
Temperature Stability±0.5 °C
Power Supply220–240 V, 50 Hz
Heating Power2450 W
Circulation Pump Power280 W
Rated Flow Rate30 L/min
Maximum Pressure1 bar
External Port Size3/4"
Bath MaterialSUS304 Stainless Steel
Opening DimensionsΦ350 × 220 mm
Overall Dimensions (W×D×H)505 × 420 × 735 mm
Net Weight28 kg
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
ModelDHJF-2005A
TypeCirculating Constant-Temperature Bath with Integrated Magnetic Stirrer
Temperature Range−20 °C to 99 °C
Temperature Stability±0.2 °C
Display Resolution0.01 °C
Bath Volume5 L (working volume)
External Circulation Flow Rate20 L/min
Maximum Pressure0.4 bar
RefrigerantR404A
Cooling Capacity300 W at −20 °C, 420 W at 0 °C, 520 W at 20 °C, 900 W at 90 °C
Heating Power1500 W
Total Power Consumption2210 W
Stirring Motor Power50 W
Stirring Speed Range100–1000 rpm
Bath Material304 Stainless Steel
Opening DiameterØ210 mm
External PortRc1/2
Max Flask Capacity Supported2000 mL
Dimensions (W×D×H)385×560×735 mm
Net Weight55 kg
Ambient Operating Conditions5–35 °C, ≤70% RH
Power Supply220–240 V~, 50 Hz
Safety ProtectionsOvertemperature, overcurrent, overload, leakage current, overpressure, dry-run prevention (for heating models)
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelSY-200-200
Circulation ModeExternal Circulation
Temperature ControlHeating-Only
Temperature RangeAmbient +5 °C to 200 °C
Temperature Stability±0.5 °C
Total Power Consumption24.75 kW
Supply Voltage3-phase, 380 V, 50 Hz
Pump Power750 W
Max Flow Rate150 L/min
Max Pressure2.5 bar
Heat Transfer FluidThermal Oil
Cooling CoilIntegrated water-cooled coil for auxiliary temperature regulation
Reservoir Capacity25 L
External Port ConnectionR21
IP RatingIP20
Pollution Degree2
Dimensions (W×D×H)610 × 940 × 1590 mm
Weight240 kg
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Product CategoryDomestic
ModelDHJF-1250
Instrument TypeConstant-Temperature Bath
Circulation ModeInternal Circulation
Temperature ControlRefrigeration & Heating
Bath Volume50 L
Temperature Range−120 °C to −60 °C
Temperature Stability±2 °C
Power Supply3-phase, 380 V, 50 Hz
Refrigeration Capacity700 W at −60 °C / 580 W at −80 °C / 420 W at −100 °C / 125 W at −120 °C
Max Flask Capacity20 L
Overall Power Consumption4876 W
External Dimensions (L×W×H)1340 × 820 × 1310 mm
Net Weight265 kg
Tank Material304 Stainless Steel + Polymer Anti-Corrosion Lining
DisplayDigital LED with Keypad Input
Cabinet FinishCold-Rolled Steel with Electrostatic Powder Coating
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Equipment TypeCirculating Constant-Temperature Bath
Circulation ModeInternal & External Circulation
Temperature ControlDual-mode (Refrigeration & Heating)
Bath Volume10 L
Temperature Range−30 °C to +99 °C
Temperature Stability±0.5 °C
Power Supply220 V~, 50 Hz
Added to wishlistRemoved from wishlist 0
Add to compare
BrandGreat Wall
ModelSY-20-160
Temperature Range+5 °C above ambient to 160 °C
Temperature Stability±0.5 °C
Heating Power3 kW
Circulation Flow Rate≤42 L/min
Max. Pressure2.8 bar
Pump Power370 W
Heat Transfer Fluid Capacity9 L
External Cooling CoilYes (water-cooled)
Protection FunctionsOvertemperature, leakage current, thermal overload, overcurrent, phase sequence
Power Supply220–240 V~, 50 Hz
IP RatingIP20
Pollution Degree2
Dimensions (W×D×H)430×690×1075 mm
Weight60 kg
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Product CategoryDomestic
ModelDHJF-4002
Instrument TypeConstant-Temperature Bath
Circulation ModeExternal Circulation
Temperature ControlRefrigeration & Heating Dual-Mode
Bath Volume2 L
Temperature Range−40 °C to +99 °C
Temperature Stability±0.2 °C
Total Rated Power820 W
Heating Power300 W
Magnetic Stirring Power50 W
Stirring Speed100–1000 rpm
RefrigerantR404A
Cooling Capacity (W)290 @ 10 °C, 200 @ 0 °C, 120 @ −10 °C, 80 @ −20 °C, 50 @ −30 °C, 10 @ −40 °C
Input Voltage220 V~, 50 Hz
Opening DiameterØ140 mm
Bath DimensionsØ160 × 105 mm (D × H)
Max Flask Capacity500 mL
Bath Material304 Stainless Steel
Overall Dimensions430 W × 470 D × 435 H mm
Net Weight35 kg
Ambient Operating Conditions5–35 °C, ≤70% RH
Added to wishlistRemoved from wishlist 0
Add to compare
BrandGreat Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Equipment CategoryDomestic
ModelHX-2015
Instrument TypeConstant-Temperature Bath Circulator
Circulation ModeInternal & External
Temperature ControlRefrigeration & Heating
Bath Volume15 L
Temperature Range−20 °C to +99 °C
Temperature Stability±0.05 °C
Refrigeration Capacity370–1200 W
Heating Power1750 W
Flow Rate10 L/min
Tank Dimensions (L×W×H)365 × 245 × 168 mm
Overall Dimensions (L×W×H)480 × 340 × 780 mm
Construction Material304 Stainless Steel
Control MethodPID Algorithm
DisplayDigital LED
CompressorHermetic Air-Cooled Unit (Imported from USA/France)
PumpDual-Impeller Circulation Pump with Self-Priming Capability
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Product CategoryDomestic
ModelSY-20-250D
Instrument TypeConstant-Temperature Bath
Circulation ModeInternal & External Loop
Temperature ControlHeating-Only
Temperature Range5–250 °C
Temperature Stability±0.5 °C
Power Supply220–240 V~, 50 Hz
Maximum Flow Rate28 L/min
Maximum Pressure3.0 bar
Circulation Pump Power500 W
Heating Power3 kW
Total Power Consumption3.5 kW
Heat Transfer Fluid Capacity9 L
External Cooling InterfaceR2¾
IP RatingIP20
Pollution Degree2
Dimensions (W×D×H)430 × 690 × 1075 mm
Weight60 kg
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Product CategoryDomestic
ModelDHJF-2005
Instrument TypeConstant-Temperature Bath
Circulation ModeInternal & External Circulation
Temperature ControlRefrigeration & Heating Dual-Mode
Bath Volume5 L
Temperature Range−20 °C to 99 °C
Temperature Stability±0.2 °C
Total Rated Power2130 W
Heating Power1500 W
RefrigerantR404A
Refrigeration Capacity570 W @ 10 °C, 470 W @ 0 °C, 385 W @ −10 °C, 230 W @ −20 °C
Pump Flow Rate20 L/min
Pump Pressure0.4 bar
Magnetic Stirring Power50 W
Stirring Speed100–1000 rpm
Input Voltage220 V~, 50 Hz
Ambient Operating Temperature5–35 °C
Bath Material304 Stainless Steel
External Port ThreadRc1/2
Opening DiameterØ210 mm
Bath Dimensions (Ø × H)250 × 130 mm
Max Flask Capacity Supported2000 mL
Overall Dimensions (W × D × H)385 × 560 × 735 mm
Net Weight55 kg
Added to wishlistRemoved from wishlist 0
Add to compare
BrandGreat Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelDL30-700
Cooling Capacity (W)1750 @ 0°C
Temperature Range (°C)−30 to +5
Temperature Stability (°C)±2
Ambient Temp. Range (°C)5–35
Ambient Humidity (% RH)≤70
Power Supply220–240 V, 50 Hz
RefrigerantR410A (CFC-free)
Reservoir Volume (L)17
Pump Flow Rate (L/min)20
Max. System Pressure (bar)0.4
Reservoir MaterialSUS304 Stainless Steel
External Port Size1/2" NPT
Dimensions (W×D×H, mm)465 × 690 × 820
Net Weight (kg)80
Safety ProtectionsDelayed Start, Leakage Detection, Overcurrent, Overtemperature
DisplayDigital Microcontroller with Chinese UI
Liquid Level IndicatorIntegrated Visual Gauge
System Pressure GaugeInstalled
FiltrationIn-line Particulate Filter
Dryer FilterDanfoss DML Series with 3A Molecular Sieve
CompressorPanasonic Wakō Scroll-Type Rotary Compressor
CondenserAir-Cooled Finned-Tube with Oxygen-Free Copper Spiral Tube
EvaporatorImmersed Coil-Type in Reservoir
Circulation SystemHermetically Sealed, Leak-Proof Stainless Steel Loop
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Product CategoryDomestic
ModelDHJF-2005A
Instrument TypeConstant-Temperature Bath
Circulation ModeInternal & External Circulation
Temperature ControlRefrigeration & Heating
Bath Volume5 L
Temperature Range−20 °C to 99 °C
Temperature Stability±0.2 °C
Temperature Resolution0.01 °C
Total Power Consumption2210 W
Heating Power1500 W
Magnetic Stirring Power50 W
Stirring Speed100–1000 rpm
RefrigerantR404A
Cooling Capacity300 W at −20 °C, 420 W at 0 °C, 520 W at 20 °C, 900 W at 90 °C
Pump Flow Rate20 L/min
Maximum Backpressure0.4 bar
Input Voltage220 V~, 50 Hz
Ambient Operating Temperature5–35 °C
Relative Humidity≤70%
Bath Opening DiameterØ210 mm
Bath Dimensions (Ø × H)250 × 130 mm
Overall Dimensions (W × D × H)385 × 560 × 735 mm
Net Weight55 kg
Safety ProtectionsOverload, Overcurrent, Overtemperature, Leakage Current, Overvoltage, Dry-run Protection (for heating models)
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Product CategoryDomestic
ModelSY-10
Instrument TypeWater/Oil Bath Circulator
Circulation ModeInternal & External Circulation
Temperature ControlHeating-Only
Bath Volume10 L
Temperature RangeAmbient +5 °C to 200 °C
Temperature Stability±0.5 °C
Pump MaterialHigh-Temperature Stainless Steel Shielded Pump
Bath Tank MaterialSUS304 Stainless Steel
Control SystemPID Digital Controller with LED Display
Heating ElementODM-Sourced Industrial-Grade Heater Compliant with GB Standards
Structural DesignVertical Stand with Castor Wheels
External Port Fittings3/4" Stainless Steel Insulated Quick-Connect Ports
Power Supply220–240 V, 50 Hz
Added to wishlistRemoved from wishlist 0
Add to compare
BrandGreat Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
ModelHX-3010
Temperature Range−30 °C to +99 °C
Temperature Stability±0.2 °C
Display Resolution0.1 °C
Heating Power1600 W
RefrigerantR404A
Max. Pump Pressure0.2 bar
Max. Flow Rate10 L/min
Reservoir Volume10 L
Reservoir Opening120 mm (W) × 141 mm (D)
Reservoir Depth145 mm
Dimensions (W×D×H)255 mm × 490 mm × 693 mm
Weight55 kg
Power Supply220–240 V~, 50 Hz
Total Power Consumption2160 W
Communication InterfaceRS485
Enclosure MaterialCold-Rolled Steel with Electrostatic Powder Coating
IP RatingIP20
Pollution Degree2
Operating Ambient5–35 °C, ≤70% RH
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Product CategoryDomestic Instrument
ModelDHJF-4010
Instrument TypeConstant-Temperature Bath
Circulation FunctionExternal Circulation
Temperature Control ModeRefrigeration & Heating
Bath Volume10 L
Temperature Range−40 °C to +99 °C
Temperature Stability±0.2 °C
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelHT-1500
Cooling MethodAir-Cooled
RefrigerantR410A
Temperature Control ModePID
Ambient Operating Conditions5–40°C / 30–70% RH
Setpoint Range5–40°C
Cooling Capacity1500 W
Temperature Stability±0.2°C
Circulation Pump Max Pressure0.14 MPa
Circulation Pump Max Flow Rate40 L/min
Reservoir Volume5 L
Heat Transfer Fluid OptionsDeionized Water or 15% Ethylene Glycol Solution
Inlet/Outlet Port SizeRc1/2
Refill Pressure Range0.2–0.5 MPa
Refill Temp Range5–40°C
Refill Rate1 L/min
Refill Port SizeRc3/8
Overflow Port SizeRc3/4
Safety ProtectionsOverpressure, Overcurrent, Thermal Overload, Overheat, Low-Level Liquid Detection
Total Power Consumption1160 W
Input Current6.2 A
Power Supply220–240 V~, 50 Hz
Dimensions (W×D×H)403×576×645 mm
Noise Level68 dB(A) @ 1 m (front, no load, steady state)
Net Weight50 kg
Communication InterfacesRS485, RS232, ZigBee Wireless
Data LoggingInternal Auto-Storage + USB Export
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
OriginHenan, China
Manufacturer TypeManufacturer
Product CategoryDomestic
ModelDHJF-4005A
Instrument TypeConstant-Temperature Bath
Circulation FunctionExternal Circulation
Temperature Control ModeRefrigeration & Heating
Bath Volume5 L
Temperature Range−40 °C to +99 °C
Temperature Stability±0.2 °C
Temperature Resolution0.01 °C
Total Power Input2450 W
Heating Power1500 W
Circulation Pump Power100 W
Flow Rate20 L/min
Maximum Pressure0.4 bar
Magnetic Stirring Power50 W
Stirring Speed Range100–1000 rpm
RefrigerantR404A
Cooling Capacity (W)1100 @ 90 °C, 720 @ 10 °C, 640 @ −10 °C, 500 @ −20 °C, 310 @ −30 °C, 150 @ −40 °C
Power Supply220 V AC, 50 Hz
Ambient Operating Conditions5–35 °C, ≤70% RH
External PortRc1/2
Opening DiameterØ210 mm
Bath DimensionsØ250 × 130 mm (D × H)
Max Flask Capacity Supported2000 mL
Bath Material304 Stainless Steel
Overall Dimensions385 W × 560 D × 735 H mm
Net Weight60 kg
Added to wishlistRemoved from wishlist 0
Add to compare
BrandThe Great Wall
OriginHenan, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelSY-100-250
Temperature Range+5 °C above ambient to 250 °C
Temperature Stability±0.5 °C
Circulation Flow Rate120 L/min
Maximum Pressure1.5 bar
Heating Power12 kW
Total Power Consumption12.75 kW
Pump Power750 W
Heat Transfer Fluid Capacity17 L
External Cooling InterfaceR2 3/4
Power Supply3-phase, 380 V, 50 Hz
IP RatingIP20
Pollution Degree2
Dimensions (W×D×H)640×940×1585 mm
Weight185 kg
Safety ProtectionsOvertemperature, leakage current, thermal overload, phase sequence, and overcurrent protection
Heat Transfer MediumThermal oil
Show next
InstrumentHive
Logo
Compare items
  • Total (0)
Compare
0