Atomic Absorption Spectrophotometer DW-220A/B
DW-220A/B Atomic Absorption Spectrophotometer is designed for reliable elemental analysis with a 190–900 nm wavelength range, 8-lamp automatic turret, Czerny-Turner monochromator, Hamamatsu PMT detector and dual background correction. DW-220A supports both flame and graphite furnace analysis, while DW-220B is optimized for routine flame AAS testing.
Drawell Atomic Absorption Spectrophotometer Solutions
Features of Atomic Absorption Spectrophotometer DW-220A/B
- 8-Lamp Automatic Turret: Fully automatic 8-lamp turret supports 1 lamp working + 7 lamps preheating simultaneously, improving multi-element analysis efficiency.
- Stable Optical System: Aberration-corrected Czerny-Turner monochromator with a high-performance Hamamatsu PMT detector ensures stable optical performance and reliable detection.
- Precise Flame Gas Control: High-precision mass flow controllers accurately regulate fuel gas flow, while the modular gas supply system improves operational stability and safety.
- Extended Flame Linear Range: Interchangeable emission burner is suitable for easily ionized elements such as K and Na, providing a linear range up to 3× wider than a conventional flame.
- Flexible Graphite Furnace Control: Supports optical control and constant-voltage control for graphite furnace analysis, allowing optimization according to different elements and graphite tubes.
- One-Click Method Optimization: Automatic optimization of analytical conditions plus an expert method database simplifies method setup and routine operation.
- Chemical-Resistant Spray Chamber: Molded PPS spray chamber offers high chemical and thermal resistance, suitable for strong-acid and demanding sample environments.
- Multi-Level Safety & Reliable Communication: Lamp-current monitoring, safety interlocks, graphite furnace temperature protection and dual circuit breakers improve operational safety, while bus-based communication enhances anti-interference and data transmission reliability.
Applications of DW-220A/B
Environmental and Water Testing
Used for trace Hg, As and other supported elements in drinking water, groundwater, river water, wastewater and environmental water samples.
Food and Agricultural Testing
Suitable for trace-element monitoring in food, agricultural products and food-safety laboratories.
Soil, Feed and Fertilizer Analysis
Used for trace-element determination in agricultural and environmental samples after appropriate sample preparation.
Pharmaceutical and Cosmetic Testing
Supports quality-control testing of trace elements in pharmaceutical, herbal and cosmetic materials.
Geological and Metallurgical Analysis
Suitable for geological survey and metallurgical laboratories requiring trace analysis of supported elements.
Public Health and Research
Suitable for trace-element analysis of properly prepared biological and laboratory research samples.
DW-220A vs DW-220B
| Feature | DW-220A | DW-220B |
| Flame Analysis | Yes | Yes |
| Graphite Furnace | Yes | — |
| GF Temperature | Up to 3000°C | — |
| GF Heating Rate | >2500°C/s | — |
| Burner Height / Position | Automatic | Push-button / Manual |
| Spectral Bandwidth | 0.1 / 0.2 / 0.4 / 0.8 / 1.6 nm | 0.1 / 0.2 / 0.4 / 1.2 nm |
| Best For | Trace analysis & flexible laboratory testing | Routine flame elemental analysis |
Which Model Should I Choose?
Choose DW-220A
For laboratories requiring Flame + Graphite Furnace AAS, higher-sensitivity analysis and more automated burner positioning.
Choose DW-220B
For laboratories mainly performing routine flame AAS metal analysis and looking for a simpler configuration.
AAS Display
FAQ
Specifications of Atomic Absorption Spectrophotometer DW-220A/B
| Wavelength Range | 190nm ~ 900nm |
| Light Source | 8-lamp turret automatically rotates and aligns |
| 2 positions for High performance lamp. | |
| 8-lamp power on and multiple lamp preheat at the same time. | |
| Lamp current range: 0~15mA | |
| Power Supply | Main Unit for model A：Single phase AC, 110V/220V，max power consumption: 0.2kVA |
| Main Unit for model B：Single phase AC, 110V/220V，max power consumption: 0.15kVA | |
| GF Power Supply for model A：Single phase AC, 220V，max power consumption: 5.5kVA | |
| Dimensions & Weight | Main Unit for Type A：1020mm（L）×530mm（W）×500mm（H），85kg |
| Main Unit for Type B：1020mm（L）×530mm（W）×500mm（H），80kg | |
| GF Power Supply for Type A：350mm（L）×490mm（W）×430mm（H），40kg |
Optical System
- Czerny-Turner monochromator
- Diffraction Grating： Groove 1800lines/mm， blaze wavelength 250nm
- Focal Length：277mm
- Spectral Bandwidth： 0.1nm, 0.2nm, 0.4nm, 0.8nm, 1.6nm
- automatically change（Model A）
- 0.1nm, 0.2nm, 0.4nm, and 1.2nm automatically change（Model B）
- Automatic peak-picking, automatic spectral bandwidth setting, automatic energy, and wavelength optimization.
Flame System
- 10cm Ti burner head for air-acetylene flame, emission burner provided.
- Burner head height and horizontal position automatic adjustment, with burner angle rotatable. （Model A）
- Burner head height push-button adjustable and horizontal position manually adjusted, with burner angle rotatable. （Model B）
- Direct forming spray chamber with corrosion-resistant material PPS
- Automatic ignition with high precision mass flow control system, realizing fully automated fuel gas flow control an adjustment.
Graphite Furnace System（Type A）
- Longitudinal heating GF system with temperature up to 3000℃, a heating rate of more than 2500℃/s.
- Two temperature control modes are selectable: optical and constant voltage. Both slope and stepped temperature programming are available.
- Fully automatic GF height and horizontal position setting and optimization.
- Inner gas, external gas, and make-up gas are controlled separately. A circulating water and gas flow monitoring system is equipped.
- Different types of graphite tubes can be used.
Safety Protection
- Full package of safety protection measures, with hardware and software dual alarm system.
- Real-time monitoring for flame condition and air pressure etc., with automatic flame shutting down, gas supply cutting off, and activating alarm when abnormal detected， such as ignition failure, fuel gas leakage, flow control error, etc.
- Real-time monitoring for GF conditions and heating program etc., with automatic power cut-off and alarm when abnormality detected, such as water and gas control errors, graphite tube installation mistakes, temperature control problems, etc.
Background Correction
- D2 lamp background correction, with correction ability more than 30 times.
- S-H background correction, with correction ability more than 30 times.
Software and Communication
- Intelligent operation software is compatible to WinXP, Win7, Win8, Win10.
- One-key operation for instrument optimization, supporting multi-task analysis.
- Automatic curve fitting, automatic re-slope, automatic concentration calculation, etc.
- Repeat measure 1~99 times, automatic calculation of Average Value, Standard Deviation, RSD, etc..
- Standard USB communication port.
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Why Choose Us?
“Multiple suppliers” have always been an issue in the procurement process. Drawell as a one-stop laboratory equipment and scientific instruments supplier, can perfectly solve this problem. In addition to manufacturing our own equipment, we also represent other laboratory equipment. Our product lines are rich and diverse at competitive prices. Provide one-stop service to customers.
User Training – Training by Drawell skilled engineers about installation, debug tests, technical services, etc. It can happen in our factory in China, or at the site in the customers’ country. Cost depends on where and when the training happens.
To discuss the problem and get it resolved, online chats, real-time video calls, and remote guidance. For the after-sales stage, our online technical guidance is free and ready forever.
1 year free official warranty, including repairing quality-damaged parts, and offering replacements of selected parts (shipping cost is extra). 5% of the product price is charged for extending the warranty before the end of the official warranty.
