Sample Dilution Instrument
The sample diluter is used for the automated dilution and pretreatment of samples—such as food, pharmaceuticals, and cosmetics—that contain microorganisms. The instrument automatically performs serial dilutions on samples of any weight, thereby simplifying laboratory workflows.
Request a QuoteProduct Introduction
The HD-DT20 Sample Dilution Instrument is designed for automatic sample weighing, dilution calculation, diluent addition, and sample pretreatment in microbiology laboratories.
It is mainly used for the automatic dilution of microbial samples from food, pharmaceuticals, cosmetics, and other testing materials. The instrument can automatically complete gradient dilution for samples of different weights, helping laboratories simplify sample preparation, reduce manual operation, improve dilution accuracy, and lower the risk of contamination during pretreatment.
The HD-DT20 can be used as a gravimetric dilutor, automatic microbial sample weight dilutor, continuous gradient dilutor, intelligent electronic dilutor, automatic weighing dilutor, automatic dilution instrument, gravimetric automatic dilutor, and dilution preparation instrument.
Working Principle
The HD-DT20 works based on automatic weighing and precision liquid dispensing.
First, the built-in precision balance weighs the sample that needs to be diluted. Then, according to the measured sample weight and the preset dilution ratio, the system automatically calculates the required amount of diluent. After calculation, the instrument controls the precision pump to add the correct volume of diluent automatically.
This process allows the system to complete sample dilution with high accuracy and minimal manual operation. Because the diluent only passes through sterilizable dispensing tubing, the risk of sample contamination is reduced.
Main Applications
The HD-DT20 Sample Dilution Instrument is suitable for sample pretreatment and automatic dilution in microbiological testing workflows.
Typical applications include:
- Food microbiology sample dilution
- Pharmaceutical microbiology sample pretreatment
- Cosmetic microbiology testing
- Microbial limit testing
- Food safety testing
- Quality control laboratories
- Environmental microbiology testing
- Third-party testing laboratories
- Research and teaching laboratories
- Routine laboratory sample preparation
It is especially suitable for laboratories that need accurate sample dilution before microbial counting, pathogen detection, enrichment culture, or other microbiological analysis.
Technical Specifications
| Item | Specification |
|---|---|
| Product Name | Sample Dilution Instrument |
| Model | HD-DT20 |
| Main Function | Automatic weighing, dilution calculation, diluent addition, and sample pretreatment |
| Application Samples | Food, pharmaceutical, cosmetic, and microbial samples |
| Working Principle | Precision balance weighing + automatic calculation + precision pump diluent addition |
| Balance Weighing Accuracy | 0.01 g |
| Liquid Pump Dispensing Accuracy | 0.1 g |
| Dilution Accuracy | >99.9% |
| Weighing Range | 0–2400 g, including tare weight |
| Dilution Range | 20–2400 g |
| Dilution Ratio | Any fraction with numerator and denominator from 1 to 999 |
| Dispensing Speed | 950 ml/min |
| Dilution Time Example | 25 g sample + 225 ml diluent in less than 30 seconds |
| Automatic Dispensing | Replaceable dispensing platform, weight-based automatic dispensing |
| Dispensing Accuracy | 0.03 ml |
| Operation Interface | Large LCD touch screen |
| Data Storage | Built-in microprocessor data storage |
| Data Export / Printing | Date, time, operator ID, sample ID, sample weight, dilution factor, diluent ID, total weight, final accuracy |
| Safety Design | Separate dispensing tube and pump; diluent only passes through sterilizable tubing |
| Waterproof Design | Seamless waterproof safety design |
| Standard Configuration | Main unit, 2 injection tubes, dispensing platform |
System Functions
Automatic Sample Weighing
The instrument uses a precision balance to weigh the sample automatically. The weighing accuracy is 0.01 g, supporting accurate dilution calculation for samples of different weights.
Automatic Dilution Calculation
After weighing, the system automatically calculates the required diluent amount according to the preset dilution ratio. This reduces manual calculation errors and improves workflow consistency.
Automatic Diluent Addition
The precision pump automatically adds the calculated amount of diluent. The liquid pump dispensing accuracy is 0.1 g, helping ensure accurate and repeatable dilution results.
Flexible Dilution Ratio Setting
The dilution ratio can be set as any fraction with numerator and denominator from 1 to 999. This allows the instrument to meet different sample preparation requirements in microbiology laboratories.
High Dilution Accuracy
The HD-DT20 provides dilution accuracy of more than 99.9%, making it suitable for microbiological sample preparation where precision and repeatability are important.
Fast Dilution Speed
The instrument supports a dispensing speed of 950 ml/min. For example, adding 225 ml diluent to a 25 g sample can be completed in less than 30 seconds.
Automatic Dispensing Function
The system supports a replaceable dispensing platform and can automatically dispense liquid according to weight. This means the instrument can also support certain dispensing workflows without requiring a separate dispenser.
Touch Screen Operation
The instrument uses a large LCD touch screen to display operation information. Users can start dilution with one click, making daily laboratory operation simple and efficient.
Programmable Data Management
Experimental data are stored in the built-in microprocessor and can be programmed according to laboratory workflow needs.
The system can export or print records including:
- Date
- Time
- Operator ID
- Sample ID
- Sample weight
- Dilution factor
- Diluent ID
- Total weight
- Final accuracy
This helps laboratories improve traceability and quality management.
Safety and Contamination Control
Sterilizable Liquid Path
The diluent only passes through sterilizable dispensing tubing. This design helps avoid direct contamination of the instrument and reduces contamination risk during sample dilution.
Separated Tube and Pump Design
The dispensing tube is separated from the pump, making cleaning, sterilization, and replacement more convenient.
Homogenizer Bag Opening Design
The instrument is designed so that the bag opening method does not touch the bag mouth during operation. This helps avoid operation-related contamination.
Seamless Waterproof Structure
The whole instrument adopts a seamless waterproof safety design, making it more suitable for laboratory environments where liquid handling is frequent.
Core Components
The HD-DT20 Sample Dilution Instrument includes the dilution instrument main unit, injection tubes, and dispensing platform.
Main Unit
The main unit integrates weighing, calculation, pump control, touch screen operation, data storage, and dilution workflow management.
Precision Balance
The precision balance measures sample weight and provides the data required for automatic diluent calculation.
Precision Pump
The precision pump controls diluent addition according to the calculated value, supporting accurate and stable dilution.
Injection Tubes
The system is equipped with injection tubes for diluent transfer. The tubes can be managed according to laboratory cleaning and sterilization requirements.
Dispensing Platform
The replaceable dispensing platform supports weight-based automatic dispensing and expands the instrument’s application flexibility.
Operation Workflow
A typical HD-DT20 workflow includes:
- Prepare the sample and diluent
- Place the sample or homogenizer bag on the weighing platform
- Select or set the required dilution ratio
- The instrument automatically weighs the sample
- The system calculates the required diluent amount
- The precision pump automatically adds the diluent
- The dilution process is completed automatically
- Data are stored in the system
- Records can be exported or printed for quality control
- The dispensing tube can be cleaned or sterilized after use
This workflow helps laboratories complete sample dilution quickly and with better repeatability than manual dilution.
Applicable Laboratories and Institutions
The HD-DT20 is suitable for:
- Food safety testing laboratories
- Pharmaceutical microbiology laboratories
- Cosmetic testing laboratories
- Biopharmaceutical quality control laboratories
- Microbial limit testing laboratories
- Environmental microbiology laboratories
- Public health laboratories
- Third-party testing laboratories
- Research institutes
- Universities and teaching laboratories
- Industrial quality control departments
Product Advantages
Automatic Dilution for Any Sample Weight
The instrument can automatically calculate and add diluent according to the actual sample weight, making dilution more flexible and accurate.
High Dilution Accuracy
With dilution accuracy greater than 99.9%, the HD-DT20 supports reliable sample pretreatment for microbiological testing.
Fast Sample Preparation
The instrument can add 225 ml diluent to a 25 g sample in less than 30 seconds, helping improve laboratory efficiency.
Reduced Manual Operation
The entire dilution process is completed automatically, reducing manual calculation, manual liquid addition, and repetitive operation.
Lower Contamination Risk
The diluent only passes through sterilizable tubing, and the bag opening design helps prevent contact with the bag mouth.
Flexible Dilution Ratio
Any fraction with numerator and denominator from 1 to 999 can be set, making the system suitable for different testing methods.
Built-in Data Traceability
The system can store, export, and print complete dilution records, supporting laboratory quality management and audit requirements.
Integrated Dispensing Capability
The replaceable dispensing platform supports automatic weight-based dispensing, reducing the need for additional dispensing equipment in some workflows.
Easy Touch Screen Operation
The large LCD touch screen provides clear operation information and supports one-click startup.
Waterproof Laboratory Design
The seamless waterproof design improves safety and durability during daily liquid handling operations.
Installation Requirements
The HD-DT20 should be installed on a stable laboratory bench in a clean, dry, and well-ventilated environment. The work area should provide enough space for the main unit, diluent container, injection tubes, dispensing platform, samples, and homogenizer bags.
The instrument should be placed away from strong vibration, excessive dust, corrosive gases, and direct sunlight. A stable power supply should be prepared according to the instrument configuration.
Before use, the weighing platform should be placed level and the liquid path should be installed correctly to ensure accurate weighing and diluent dispensing.
Maintenance Requirements
Routine maintenance includes cleaning the instrument surface, checking the injection tubes, confirming pump operation, verifying weighing accuracy, cleaning or sterilizing liquid-contact tubing, and checking dispensing performance.
After using culture media, diluents, or sample preparation liquids, the tubing should be cleaned or sterilized according to laboratory procedures to prevent residue, blockage, or contamination.
Laboratories should regularly check weighing and dilution accuracy according to internal quality control requirements.
Packaging and Export
The HD-DT20 can be packed with protective materials to ensure safe transportation of the main unit, injection tubes, dispensing platform, and operating documents.
For export projects, product configuration guidance, technical documents, operation instructions, installation support, and after-sales service can be provided according to customer requirements.
Customization Service
The instrument can be configured according to different laboratory workflows and sample preparation requirements.
Customization options may include:
- Dilution workflow configuration
- Dispensing platform selection
- Injection tube configuration
- Data export format setting
- Record printing requirements
- Laboratory quality control workflow support
- Application-specific dilution process settings
Product appearance, structure, performance, and technical parameters may change due to continuous product upgrades. Final configuration should be confirmed according to the latest product information.
Related Equipment and Applications
The HD-DT20 can be used as part of a complete microbiology sample preparation solution. Related equipment and applications include:
- Gravimetric dilutor
- Automatic microbial sample weight dilutor
- Continuous gradient dilutor
- Intelligent electronic dilutor
- Automatic weighing dilutor
- Automatic dilution instrument
- Gravimetric automatic dilutor
- Dilution preparation instrument
- Microbial sample pretreatment system
- Food microbiology sample dilution
- Pharmaceutical microbiology sample preparation
- Cosmetic microbiology testing
- Microbial limit testing sample preparation
FAQ
1. What is the HD-DT20 used for?
The HD-DT20 is used for automatic sample weighing, dilution calculation, diluent addition, and sample pretreatment in microbiology laboratories.
2. What samples can it process?
It can be used for microbial samples from food, pharmaceuticals, cosmetics, and other testing materials.
3. How does the instrument calculate the diluent amount?
The system weighs the sample with a precision balance, then automatically calculates the required diluent amount based on the preset dilution ratio.
4. What is the weighing accuracy?
The sample balance weighing accuracy is 0.01 g.
5. What is the dilution accuracy?
The dilution accuracy is greater than 99.9%.
6. What is the weighing range?
The weighing range is 0–2400 g, including tare weight.
7. What is the dilution range?
The dilution range is 20–2400 g.
8. Can the dilution ratio be customized?
Yes. The dilution ratio can be set as any fraction with numerator and denominator from 1 to 999.
9. How fast can it complete dilution?
The dispensing speed is 950 ml/min. For example, adding 225 ml diluent to a 25 g sample takes less than 30 seconds.
10. Does the instrument reduce contamination risk?
Yes. The diluent only passes through sterilizable tubing, and the bag opening design helps prevent contact contamination.
11. Can the system export or print records?
Yes. The system can export or print records including date, time, operator ID, sample ID, sample weight, dilution factor, diluent ID, total weight, and final accuracy.
12. What is included in the standard configuration?
The standard configuration includes the dilution instrument main unit, two injection tubes, and a dispensing platform.