15L 20kHz Low-Frequency Ultrasonic Bath – 0–800W Power with Degas, Sweep & Pulse
$870.00 piece
High-impact 15L 20kHz low-frequency ultrasonic bath with 0–800W adjustable power, degas & sweep for sludge treatment, sewage processing & heavy-duty cleaning.
| Quantity | Price | Discount |
|---|---|---|
| 2-20 | $826.50 piece | 5% |
| 21-100 | $783.00 piece | 10% |
| 101+ | $739.50 piece | 15% |
Shipping & Delivery
-
Express Air Delivery
Door-to-door with tracking
7-15 Business Days
Calculated at checkout
-
Standard Ocean Freight
Best for bulk & heavy cargo
25-35 Business Days
Calculated at checkout
-
Warranty 1 year
-
Free 30-Day returns
Specification
Overview
| Model | GNLH0815-20 |
|---|---|
| Brand | Granbo |
| Manufacturer | Granbo Technology Industrial Shenzhen Co., Ltd. |
| Origin | China |
| Capacity | 15L |
| Frequency | 20kHz |
| Power | 0–800W |
| Tank Material | 3.0mm Heavy-Duty SUS304, SUS304 Stainless Steel |
| Housing Material | SUS201 Stainless Steel |
| Function | Degassing, Digital Control, Heating, Noise Reduction, Power Adjustable, Pulse, Semiwave, Sweep, Timer |
| Heater | RT~80°C |
| Timer | 1-9999s |
| Tank Size(mm) | 330 x 300 x 150 |
| Unit Size(mm) | 430 x 360 x 370 |
| Voltage | 100V-120V ~ 60Hz / 220V-240V ~ 50Hz |
| Plug Type | AU Plug, EU Plug, Other Plugs, UK Plug, US Plug |
| Warranty | 1 Year |
| Customization | 485 Port, Frequency, PLC System, Tanks Numbers |
| Certificates | CE, FCC, ISO 9001, RoHS |
| Applications | Algae Disruption, Degassing, Degreasing, Emulsification, Heavy-Duty Cleaning, Liquid Extraction, Powder Dispersion, Rust Removal, Sewage Processing, Sludge Treatment |
Packaging
| Chargeable Weight | 44.25 kg |
|---|---|
| Package Dimensions | 53 × 45 × 45 cm |
Description
Why Choose 20kHz Low Frequency Cavitation?
Operating at an ultra-low 20kHz frequency, this benchtop ultrasonic bath generates a long acoustic wavelength of approximately 72.5mm and high acoustic energy density, delivering significantly higher mechanical shockwaves and shear forces than standard 40kHz or high-frequency systems:
- Maximum Mechanical Impact: Lower frequencies generate large cavitation bubbles in the solution. Upon implosion, these bubbles release intense mechanical force and localized high-velocity fluid jets that aggressively dislodge heavy, surface-bound contaminants.
- Unmatched Heavy-Duty Cleaning: 20kHz is specifically engineered for aggressive heavy-duty cleaning of stubborn, high-adhesion deposits—such as thick oil films, heavy grease, scale, rust, carbon buildup, cutting dust, and polishing wax.
- High-Power Environmental & Fluid Processing: The vigorous agitation and macro-cavitation produced at 20kHz excel in demanding fluid treatment tasks, enabling rapid sludge treatment, sewage processing, algae disruption, liquid extraction, emulsification, powder dispersion, cell disruption, and degassing.
- Heavy-Duty Tank & Precision Power Control: Built with an ultra-thickened 3.0mm SUS304 inner tank to withstand long-term low-frequency cavitation erosion, this bath also features 0–800W adjustable power control and Sweep/Pulse modes to fine-tune acoustic energy for delicate or variable media.
Ideal Applications & Suitable Items for 15L Capacity
The expanded 15L tank capacity bridges benchtop versatility with high-volume industrial processing, making it ideal for batch cleaning medium-to-large hardware and multi-vessel setups:
- Industrial & Automotive Metal Components:
- Heavy Hardware & Engine Parts: Heavy-duty stainless steel components, engine blocks, tools, valves, nozzles, gears, bolts, and heavy metal fittings requiring deep degreasing or rust removal.
- Hard Plastics & Resins: Rigid synthetic components made of ABS, PVC, PP, and other scratch-resistant polymers.
- Large Vessel & Multi-Beaker Processing (Indirect Sonication):
- Laboratory Glassware & Beakers: The spacious 15L tank comfortably accommodates multiple 800mL, 1000mL, or larger beakers, flasks, and tube racks for uniform liquid extraction, powder dispersion, emulsification, and degassing without direct tank contact.
- Material Care Guidelines:
- Because 20kHz delivers intense physical impact, soft metals (such as aluminum, brass, or gold) and delicate glass containers may risk surface scratching or micro-cracking under full power.
- For softer or sensitive substrates, lower the output using the 0–800W power control or engage Sweep/Pulse modes to moderate cavitation force.
Control Panel Overview
Control Button Guide
Sweep Frequency Technology Overview
Pulse Mode Overview
Granbo PCB vs. Standard Ultrasonic Cleaner PCB
Multi-Layer Noise Reduction Design
Box Contents:
- 1 x Professional Ultrasonic Cleaner
- 1 x Durable Mesh Cleaning Basket
- One cover, one power cord, one manual warranty card certificate of conformity.
Packing type:
- One unit filled with thick foam, then standard export corrugated carton or wooden box.
Real Customer Feedback
Support & FAQ
Frequency determines cavitation bubble size, impact force, and penetration depth. Lower frequencies produce violent impact for heavy dirt, while higher frequencies provide dense, gentle cleaning for sub-micron microstructures:
Granbo Recommended Frequency Matrix:
• 28kHz: Heavy oil, scale, rust, polishing wax, cutting dust, and thick contaminants (>10μm) on heavy metal/resin parts.
• 40kHz: Universal choice for standard labware, stainless steel, glass, and general maintenance (>10μm particles).
• 68kHz / 80kHz: Fine cleaning for PCBs, watch components, optics, medical instruments, and micro-grooves (5–10μm particles).
• 120kHz: Precision cleaning for micro-blind holes (<0.1mm), semiconductors, ICs, optical lenses, and MEMS (1–5μm particles).
• 200kHz: Ultra-precision cleaning for silicon wafers, MEMS, thin films, and sub-micron / nano-scale contamination (<1μm).
• 28kHz: Heavy oil, scale, rust, polishing wax, cutting dust, and thick contaminants (>10μm) on heavy metal/resin parts.
• 40kHz: Universal choice for standard labware, stainless steel, glass, and general maintenance (>10μm particles).
• 68kHz / 80kHz: Fine cleaning for PCBs, watch components, optics, medical instruments, and micro-grooves (5–10μm particles).
• 120kHz: Precision cleaning for micro-blind holes (<0.1mm), semiconductors, ICs, optical lenses, and MEMS (1–5μm particles).
• 200kHz: Ultra-precision cleaning for silicon wafers, MEMS, thin films, and sub-micron / nano-scale contamination (<1μm).
Based on Granbo multi-frequency switchable configurations (Single/Dual/Triple/Quad), we recommend:
| Process | Recommended Frequency | Application Context |
|---|---|---|
| Dispersion | 17-28kHz / 40kHz / 120kHz | 17-28kHz for coarse solid chunks; 40kHz for powders; 120kHz for micro/nano suspensions. |
| Emulsification | 28kHz / 40kHz | 28kHz generates stronger shear force for heavy liquid blending. |
| Extraction | 40kHz / 120kHz | 120kHz is standard for intracellular substance extraction and cell disruption. |
| Mixing/Catalysis | 40kHz / 120kHz | 40kHz for routine mixing; 120kHz for micro-particle homogenization. |
| Synthesis | 80kHz / 120kHz | Prevents molecular degradation during material synthesis. |
| Environmental | 20kHz | High-power sonication for sludge treatment, sewage, and algae disruption. |
To resist cavitation erosion, Granbo customizes tank thickness and welding based on operating frequency:
| Frequency Range | Inner Tank (SUS304) | Outer Shell | Common Tank Capacities & Process |
|---|---|---|---|
| 28kHz - 200kHz | 1.5 mm Thickness | SUS304 (1.0 mm) | 3–10L, 14–22L, 30–58L, 61–135L. Industrial precision stamping & TIG welding. |
| 25kHz | 2.0 mm Thickness | SUS201 (1.0 mm) | Thickened tank; Manual oxy-acetylene heavy welding. |
| 17kHz & 20kHz | 3.0 mm Thickness | SUS201 (1.0 mm) | Ultra-thickened tank; Manual oxy-acetylene heavy welding. |
*Material Safety Tip: Soft metals (aluminum, brass, gold) and delicate glass/ceramics may scratch or fracture at 28kHz. We recommend 40kHz to 80kHz or pre-testing for delicate substrates.
When a workpiece has both stubborn contaminants and sub-micron precision requirements, use a multi-stage approach:
- Stage 1 (Pre-cleaning / 28kHz or 40kHz): Strips heavy grease, rust, polishing paste, scale, or coarse metal particles.
- Stage 2 (Fine Cleaning / 68kHz or 80kHz): Removes fine particles (5–10μm) from blind holes, threads, and complex internal geometry.
- Stage 3 (Ultra-Precision Rinse / 120kHz or 200kHz): Eliminates sub-micron (<1μm) residues without damaging fragile surfaces or thin films.
- Sweep Mode: Automatically sweeps ±1kHz around the center frequency to eliminate standing waves, ensuring uniform cavitation across the bath.
- Degas Mode: Uses pulsed ultrasound intervals (e.g., 5s on / 5s off) to purge dissolved air/gas from liquids—crucial for HPLC sample prep and max cavitation efficiency.
- Pulse Mode: Rapidly cycles power from 100% to 0% to produce a "blasting" impact that removes tough or baked-on residues.
Granbo units utilize Full-Bridge Separately Excited PCB Driver Boards rather than cheap self-excited circuits:
- Visualized Real-time Data: Displays live Power, Frequency, and Current for strict laboratory protocol logging.
- High Power Density: Guarantees a standard ≥ 0.3W/cm² for thorough cleaning. Power Density = Ultrasonic Power (W) / Radiating Area (cm²)
- Low Noise Operation: While 28kHz operation naturally produces more audible mechanical noise, Granbo's multi-layer noise-reduction design enables high-frequency units (≥68kHz) to operate at noise levels below 80dB.
Ultrasonic frequency determines sound wavelength and cavitation bubble collapse intensity:
Wavelength (λ) = 1,450,000 (mm/s) / Frequency (Hz)
- 20kHz (λ ≈ 72.5mm): Large bubbles, high collapse force. Best for heavy rust, sludge, and thick scale.
- 40kHz (λ ≈ 36.2mm): Medium bubbles. Ideal balance between cleaning power and component safety.
- 120kHz (λ ≈ 12.0mm): Micro bubbles. High penetration depth for sub-micron cracks and fragile silicon/semiconductor parts.
Beaker Size Matching:
• Beaker ≤ 500mL → 3.2L to 6.5L Tank.
• Beaker ≥ 800mL → 10L to 30L Tank (10L is the most popular size for general lab applications).
Temperature Management:
Ultrasonic activity inherently raises liquid temperature. Although Granbo heating goes up to 80°C, cavitation effectiveness drops significantly above 72°C–80°C due to increased vapor pressure. For temperature-sensitive or low-temp processes, use cooling coils or ice packs in the bath.
Standard production lead times for out-of-stock or customized Granbo models:
- 28kHz - 200kHz Models (Single, Dual, Triple, Quad Frequency): 3 - 5 business days for shipping.
- Ultra-Low Frequency (17kHz, 20kHz, 25kHz): 14 - 20 business days for shipping.
*Note: Customizations like RS-485 communication or PLC integration may slightly adjust delivery timelines. Contact us for precise scheduling.
More Models & Specifications
Click a model name to view its corresponding product page and detailed specifications.
20kHz Series
| Model | Transducers
(PCS) |
Capacity
(L) |
Tank Size
(LxWxH mm) |
Unit Size
(LxWxH mm) |
Frequency
(kHz) |
Ultrasonic Power
(W) |
Heating Power
(W) |
Temp.
(C) |
Timer
(S) |
| GNLH0203-20 | 2 | 3.2 | 240x135x100 | 340x195x320 | 20 | 0-200 | 300 | 20-80 | 1-9999 |
| GNLH0205-20 | 2 | 4.8 | 240x135x150 | 340x195x370 | 20 | 0-200 | 300 | 20-80 | 1-9999 |
| GNLH0304-20 | 3 | 4.5 | 300x150x100 | 400x210x220 | 20 | 0-300 | 450 | 20-80 | 1-9999 |
| GNLH0306-20 | 3 | 6.5 | 300x150x150 | 400x210x370 | 20 | 0-300 | 450 | 20-80 | 1-9999 |
| GNLH0610-20 | 6 | 10 | 300x240x150 | 400x300x370 | 20 | 0-600 | 600 | 20-80 | 1-9999 |
| GNLH0614-20 | 6 | 14 | 300x240x200 | 400x300x420 | 20 | 0-600 | 600 | 20-80 | 1-9999 |
| GNLH0815-20 | 8 | 15 | 330x300x150 | 430x360x370 | 20 | 0-800 | 1000 | 20-80 | 1-9999 |
| GNLH0819-20 | 8 | 19 | 330x300x200 | 430x360x420 | 20 | 0-800 | 1000 | 20-80 | 1-9999 |
| GNLH1422-20 | 14 | 22 | 500x300x150 | 600x360x380 | 20 | 0-1400 | 1000 | 20-80 | 1-9999 |
| GNLH1430-20 | 14 | 30 | 500x300x200 | 600x360x430 | 20 | 0-1400 | 1000 | 20-80 | 1-9999 |
15L Capacity
| Model | Transducers (PCS) |
Capacity (L) |
Tank Size (L×W×H mm) |
Unit Size (L×W×H mm) |
Frequency (kHz) |
Ultrasonic Power (W) |
Heating Power (W) |
Temp. (°C) |
Timer (S) |
|---|---|---|---|---|---|---|---|---|---|
| GNLH0815-17 | 8 | 15 | 330×300×150 | 430×360×370 | 17 | 0–640 | 1000 | 20–80 | 1–9999 |
| GNLH0815-20 | 8 | 15 | 330×300×150 | 430×360×370 | 20 | 0–800 | 1000 | 20–80 | 1–9999 |
| GNL1015-25 | 10 | 15 | 330×300×150 | 430×360×370 | 25 | 0–500 | 1000 | 20–80 | 1–9999 |
| GL0815-28 | 8 | 15 | 330×300×150 | 355×325×340 | 28 | 0–400 | 1000 | 20–80 | 1–9999 |
| GL0815-33 | 8 | 15 | 330×300×150 | 355×325×340 | 33 | 0–400 | 1000 | 20–80 | 1–9999 |
| GL0615-40 | 6 | 15 | 330×300×150 | 355×325×330 | 40 | 0–300 | 1000 | 20–80 | 1–9999 |
| GL1015-40 | 10 | 15 | 330×300×150 | 355×325×330 | 40 | 0–500 | 1000 | 20–80 | 1–9999 |
| GLS2015-50 | 20 | 15 | 330×300×150 | 355×325×330 | 50 | 0–600 | 1000 | 20–80 | 1–9999 |
| GLS2015-53 | 20 | 15 | 330×300×150 | 355×325×330 | 53 | 0–700 | 1000 | 20–80 | 1–9999 |
| GL1015-68 | 10 | 15 | 330×300×150 | 355×325×340 | 68 | 0–500 | 1000 | 20–80 | 1–9999 |
| GL1015-80 | 10 | 15 | 330×300×150 | 355×325×330 | 80 | 0–500 | 1000 | 20–80 | 1–9999 |
| GL1015-120 | 10 | 15 | 330×300×150 | 355×325×330 | 120 | 0–500 | 1000 | 20–80 | 1–9999 |
| GL1015-130 | 10 | 15 | 330×300×150 | 355×325×330 | 130 | 0–600 | 1000 | 20–80 | 1–9999 |
| GLS2015-200 | 20 | 15 | 330×300×150 | 355×325×330 | 200 | 0–500 | 1000 | 20–80 | 1–9999 |
| GL0815-2840 | 8 | 15 | 330×300×150 | 355×325×340 | 28/40 | 0–400 | 1000 | 20–80 | 1–9999 |
| GL1015-4068 | 10 | 15 | 330×300×150 | 355×325×340 | 40/68 | 0–500 | 1000 | 20–80 | 1–9999 |
| GL1015-4080 | 10 | 15 | 330×300×150 | 355×325×330 | 40/80 | 0–500 | 1000 | 20–80 | 1–9999 |
| GL1015-40120 | 10 | 15 | 330×300×150 | 355×325×330 | 40/120 | 0–500 | 1000 | 20–80 | 1–9999 |
| GL1015-80120 | 10 | 15 | 330×300×150 | 355×325×330 | 80/120 | 0–500 | 1000 | 20–80 | 1–9999 |
| GL1015-255080120 | 10 | 15 | 330×300×150 | 355×325×330 | 25/50/80/120 | 0–500 | 1000 | 20–80 | 1–9999 |
| GL1015-4080100160 | 10 | 15 | 330×300×150 | 355×325×330 | 40/80/100/160 | 0–500 | 1000 | 20–80 | 1–9999 |
| GL1015-4080120170 | 10 | 15 | 330×300×150 | 355×325×330 | 40/80/120/170 | 0–500 | 1000 | 20–80 | 1–9999 |
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